Percentage of Mandatory Convertible Shares Preferred stock, percent of mandatory convertible shares (as a percent) This element represents Percent of Mandatory Convertible Shares. Preferred Stock Seven Percent Mandatory Convertible Shares Issued Preferred stock, 7% mandatory convertible shares issued This element represents Preferred Stock Seven Percent Mandatory Convertible Shares Issued. CONDENSED CONSOLIDATED BALANCE SHEETS Statement [Table] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Statement Statement [Line Items] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Accounts receivable, less allowance for doubtful accounts ($380 at March 31, 2012 and $397 at December 31, 2011) Accounts Receivable, Net, Current Accounts receivable, net Inventories of supplies, at cost Inventory, Net Income tax receivable Income Taxes Receivable, Current Current portion of deferred income taxes Deferred Tax Assets, Net, Current Assets held for sale Assets Held-for-sale, Current Other current assets Other Assets, Current Other current assets Total current assets Assets, Current Investments and other assets Long-term Investments and Receivables, Net Investments and other assets Current portion of long-term debt Long-term Debt and Capital Lease Obligations, Current Less current portion Deferred income taxes, net of current portion Deferred Tax Assets, Net, Noncurrent Property and equipment, at cost, less accumulated depreciation and amortization ($3,442 at March 31, 2012 and $3,386 at December 31, 2011) Property, Plant and Equipment, Net Net property and equipment Goodwill Goodwill Total Total Total assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Long-term debt, net of current portion Long-term Debt and Capital Lease Obligations Long-term debt, net of current portion Accounts payable Accounts Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Professional and general liability reserves Self Insurance Reserve, Current Accrued interest payable Interest Payable, Current Accrued legal settlement costs Estimated Litigation Liability, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Other long-term liabilities Other Liabilities, Noncurrent Professional and general liability reserves Self Insurance Reserve, Noncurrent Accrued legal settlement costs Estimated Litigation Liability, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Redeemable noncontrolling interests in equity of consolidated subsidiaries Redeemable Noncontrolling Interest, Equity, Carrying Amount Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.15 par value; authorized 2,500,000 shares; 345,000 of 7% mandatory convertible shares with a liquidation preference of $1,000 per share issued at both March 31, 2012 and December 31, 2011 Preferred Stock, Value, Issued Common stock, $0.05 par value; authorized 1,050,000,000 shares; 551,631,747 shares issued at March 31, 2012 and 551,468,550 shares issued at December 31, 2011 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated deficit Retained Earnings (Accumulated Deficit) Common stock in treasury, at cost, 138,100,420 shares at March 31, 2012 and 136,442,696 shares at December 31, 2011 Treasury Stock, Value Total shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balances Balances Total liabilities and equity Liabilities and Equity Accounts receivable, allowance for doubtful accounts (in dollars) Allowance for Doubtful Accounts Receivable, Current Property and equipment, accumulated depreciation and amortization (in dollars) Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization Other intangible assets, accumulated amortization (in dollars) Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized shares Preferred Stock, Shares Authorized Preferred stock, liquidation preference per share (in dollars per share) Preferred Stock, Liquidation Preference Per Share Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized shares Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock in treasury, shares Treasury Stock, Shares Discontinued Operation Restructuring Settlement and Impairment Provisions before Income Tax Impairment of long-lived assets and goodwill, and restructuring charges, net Pretax aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period relating to a disposal group that is classified as a component of the entity. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items). Net impairment and restructuring charges in discontinued operations Health Care Organization Revenue, Gross Net operating revenues before provision for doubtful accounts The sum of revenues before provision for doubtful accounts that are recognized during the period by the entity from providing services to in-patients, outpatients, residents in facilities owned or operated by the entity, from insurance premiums, or from goods provided or services performed. Net operating revenues: Health Care Organization, Revenue [Abstract] Net operating revenues Health Care Organization, Revenue Revenues payments Operating expenses: Operating Expenses [Abstract] Salaries, wages and benefits Labor and Related Expense Investment earnings Marketable Securities, Gain (Loss) Net gain on sales of investments Gain (Loss) on Sale of Investments Net gain on sales of investments Gain on sale of investment in Peoples Health Network Supplies Health Care Organization, Medical Supplies and Drugs Expense Other operating expenses, net Other Cost and Expense, Operating Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Impairment of long-lived assets and goodwill, and restructuring charges, net Restructuring, Settlement and Impairment Provisions Net impairment and restructuring charges Litigation and investigation costs Litigation and investigation costs Gain (Loss) Related to Litigation Settlement Litigation and Investigation Costs Gain on settlement Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments for supplemental executive retirement plans Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Unrealized gains on securities available for sale Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Other comprehensive income before income taxes Other Comprehensive Income (Loss), before Tax Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income, net of tax Other comprehensive income Income tax expense related to items of other comprehensive income Other Comprehensive Income (Loss), Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Preferred stock dividends Preferred Stock Dividends (Deprecated 2011-01-31) Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to Tenet Healthcare Corporation common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Statement, Equity Components [Axis] Operating income Operating Income (Loss) Interest expense Interest Expense Gain (loss) from early extinguishment of debt Gains (Losses) on Extinguishment of Debt Loss (gain) from early extinguishment of debt Loss from early extinguishment of debt Investment earnings Gain (Loss) on Investments Equity earnings of unconsolidated affiliates Income from continuing operations, before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Income tax expense (benefit) Income tax expenses Income from continuing operations, before discontinued operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Discontinued operations: Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Income (loss) from operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Income (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Preferred stock dividends Dividends, Preferred Stock Preferred stock dividends Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Amounts attributable to Tenet Healthcare Corporation common shareholders Income Amounts Attributable to Parent, Disclosures [Abstract] Income from continuing operations, net of tax Income (Loss) from Continuing Operations Attributable to Parent Income available to Tenet Healthcare Corporation common shareholders for basic earnings per share, Income Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Earnings (loss) per share attributable to Tenet Healthcare Corporation common shareholders EARNINGS PER COMMON SHARE Basic Earnings Per Share, Basic [Abstract] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Income available to Tenet Healthcare Corporation common shareholders for basic earnings (Per-Share) Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share Total earnings (loss) per share, Basic (in dollars per share) Earnings Per Share, Basic Diluted Earnings Per Share, Diluted [Abstract] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Income available to Tenet Healthcare Corporation common shareholders for diluted earnings per share (Per-Share) Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share Total earnings (loss) per share, Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average shares and dilutive securities outstanding (in thousands): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Income available to Tenet Healthcare Corporation common shareholders for basic earnings per share (in Weighted Average Shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Income available to Tenet Healthcare Corporation common shareholders for diluted earnings per share (in Weighted Average Shares) Guarantees [Text Block] GUARANTEES Restructuring, Impairment, and Other Activities Disclosure [Text Block] IMPAIRMENT AND RESTRUCTURING CHARGES Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] DISCONTINUED OPERATIONS Stockholders' Equity Note Disclosure [Text Block] EQUITY Significant Accounting Policies [Text Block] SIGNIFICANT ACCOUNTING POLICIES Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document and Entity Information Increase (Decrease) in Inventories and Other Assets, Current Inventories and other current assets The net change during the reporting period in the aggregate value of all inventory held by the reporting entity and other current assets not otherwise defined in the taxonomy, associated with underlying transactions that are classified as operating activities. Payments for Restructuring and Litigation Costs Payments against reserves for restructuring charges and litigation costs and settlements Payments against reserves for restructuring charges and litigation costs, which may include attorneys' fees and other litigation costs. Payments to Acquire Property, Plant and Equipment for Continuing Operations Purchases of property and equipment - continuing operations The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services for continuing operations and not intended for resale; includes cash outflows to pay for construction of self-constructed assets except for new and replacement hospitals. Construction of New and Replacement Hospitals Construction of new and replacement hospitals The cash outflow from construction costs to date on new and replacement hospitals. Purchases of property and equipment - discontinued operations This element represent as Purchases of property and equipment - discontinued operations. Payments to Acquire Property, Plant and Equipment for Discontinued Operations Proceeds from Sale of Marketable Securities Long-term Investments and Other Assets Proceeds from sales of marketable securities, long-term investments and other assets The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (trading, held-to-maturity, or available-for-sale) during the period. Sale of long term investments and the sale of other assets not otherwise defined in the taxonomy. Distributions Received from Reclassification of Reserve Fund Distributions received from investments in Reserve Yield Plus Fund The cash inflow associated with the reclassification of the Reserve Yield Plus Fund investment into cash and cash equivalents due to the collection of cash during or subsequent to the reporting period. This fund did not previously meet the definition of cash equivalent. Proceeds from Interest Rate Swap Agreement Proceeds from interest rate swap agreement The cash inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations. Adjustments to reconcile net income to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Deferred income tax expense Deferred Income Tax Expense (Benefit) Stock-based compensation expense Share-based Compensation Fair market value adjustments related to interest rate swap and LIBOR cap agreements Unrealized Gain (Loss) on Derivatives Mark-to-market adjustments Amortization of debt discount and debt issuance costs Amortization of Financing Costs and Discounts Pre-tax (income) loss from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income (loss) before income taxes Other items, net Other Noncash Income (Expense) Changes in cash from operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Income taxes Increase (Decrease) in Income Taxes Receivable Accounts payable, accrued expenses and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Equity Component [Domain] Tenet Healthcare Corporation Shareholders' Equity Parent [Member] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Deficit Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Noncontrolling Interests Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balances (in shares) Balances (in shares) Shares, Issued Distributions paid to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Contributions from noncontrolling interests Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest Purchases of businesses or joint venture interests Stock Issued During Period, Value, Acquisitions Proceeds from Issuance of Convertible Preferred Stock Proceeds from issuance of mandatory convertible preferred stock Net proceeds from shares sold Stock-based compensation expense and issuance of common stock (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock-based compensation expense and issuance of common stock Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stockholders' Equity, Period Increase (Decrease) Stock Issued During Period, Shares, Period Increase (Decrease) Other long-term liabilities Increase (Decrease) in Other Operating Liabilities Net cash used in operating activities from discontinued operations, excluding income taxes Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of businesses or joint venture interests Payments to Acquire Businesses, Gross Proceeds from sales of facilities and other assets - discontinued operations Proceeds from Divestiture of Businesses Purchases of marketable securities Payments to Acquire Marketable Securities Proceeds from hospital authority bonds Proceeds from Sale and Maturity of Other Investments Release of escrow funds Increase (Decrease) in Restricted Cash Other items, net Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Repayments of other borrowings Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Proceeds from borrowings Proceeds from Issuance of Long-term Debt and Capital Securities, Net Deferred debt issuance costs Payments of Debt Issuance Costs Repurchases of common stock Payments for Repurchase of Common Stock Cash dividends on preferred stock Payments of Dividends, Preferred Stock and Preference Stock Preferred stock dividends paid Distributions paid to noncontrolling interests Payments of Dividends, Noncontrolling Interest Other items, net Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Interest paid, net of capitalized interest Interest Paid, Net Income tax payments, net Income Taxes Paid, Net Property Professional and General Liability Insurance Disclosure [Text Block] PROPERTY AND PROFESSIONAL AND GENERAL LIABILITY INSURANCE This element represent PROPERTY AND PROFESSIONAL AND GENERAL LIABILITY INSURANCE. PROPERTY AND PROFESSIONAL AND GENERAL LIABILITY INSURANCE SIGNIFICANT ACCOUNTING POLICIES IMPAIRMENT AND RESTRUCTURING CHARGES GUARANTEES PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] EQUITY ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive Income (Loss) Note [Text Block] CLAIMS AND LAWSUITS CLAIMS AND LAWSUITS Commitments and Contingencies Disclosure [Text Block] INCOME TAXES INCOME TAXES Income Tax Disclosure [Text Block] EARNINGS PER COMMON SHARE Earnings Per Share [Text Block] FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] ACQUISITIONS Business Combination Disclosure [Text Block] RECENT ACCOUNTING STANDARDS RECENT ACCOUNTING STANDARDS Accounting Changes and Error Corrections [Text Block] SEGMENT INFOMRATION SEGMENT INFOMRATION Segment Reporting Disclosure [Text Block] SUBSEQUENT EVENTS SUBSEQUENT EVENTS Subsequent Events [Text Block] SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME Other Comprehensive Income (Loss), before Tax [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax Reclassification adjustments for realized losses included in net income Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Net losses on sales of facilities Net Income (Loss) Available to Common Stockholders, Basic Net income attributable to Tenet Healthcare Corporation common shareholders Stock Repurchased During Period, Value Repurchases of common stock Shares repurchased, amount Stock Repurchased During Period, Shares Common stock repurchased (in shares) Repurchases of common stock (in shares) ACCUMULATED OTHER COMPREHENSIVE LOSS ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS Financing Receivables [Text Block] ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS DISCONTINUED OPERATIONS LONG-TERM DEBT AND LEASE OBLIGATIONS Debt and Capital Leases Disclosures [Text Block] LONG-TERM DEBT AND LEASE OBLIGATIONS Other Assets Disclosure [Text Block] OTHER CURRENT ASSETS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] INVESTMENTS AND OTHER ASSETS INVESTMENTS AND OTHER ASSETS Stock Issued During Period, Value, New Issues Issuance of mandatory convertible preferred stock Stock Issued During Period, Shares, New Issues Issuance of mandatory convertible preferred stock (in shares) Number of shares sold Property, Plant and Equipment [Table Text Block] Schedule of components of property and equipment Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Domain] Land [Member] Land Building and Building Improvements [Member] Buildings and improvements Construction in Progress [Member] Construction in progress Equipment [Member] Equipment Property, Plant and Equipment [Line Items] Components of property and equipment Property and equipment Property, Plant and Equipment, Gross Gross property and equipment Capital Expenditures Incurred but Not yet Paid Accrued property and equipment purchases for items received but not yet paid Schedule of Goodwill [Table Text Block] Schedule of changes in the carrying amount of goodwill Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of other intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of estimated future amortization of intangibles with finite useful lives Goodwill [Roll Forward] Changes in the carrying amount of goodwill Goodwill, Gross Goodwill Goodwill Goodwill, Impaired, Accumulated Impairment Loss Accumulated impairment losses Accumulated impairment losses Goodwill, Acquired During Period Goodwill acquired during the year Goodwill, Allocation Adjustment Goodwill allocated to assets held for sale Schedule of Finite-Lived Intangible Assets by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Computer Software, Intangible Asset [Member] Capitalized software costs Long-term Debt Issue Costs [Member] Long-term debt issuance costs Represents the debt issue cost which has not yet been amortized. Other Intangible Assets [Member] Other Finite-Lived Intangible Assets [Line Items] Information regarding other intangible assets Goodwill and Other Intangible Assets Finite-Lived Intangible Assets, Gross Gross Carrying Amount Finite-Lived Intangible Assets, Net Net Book Value Other intangible assets, at cost, less accumulated amortization ($375 at March 31, 2012 and $360 at December 31, 2011) Finite-Lived Intangible Assets, Future Amortization Expense [Abstract] Estimated future amortization of intangibles with finite useful lives Finite-Lived Intangible Assets, Future Amortization Expense Total Total Future Amortization Expense, Year One 2012 Future Amortization Expense, Year Two 2013 Future Amortization Expense, Year Three 2014 Future Amortization Expense, Year Four 2015 Future Amortization Expense, Year Five 2016 Future Amortization Expense, after Year Five Later years Investments and Other Noncurrent Assets [Table Text Block] Schedule of investments and other assets Tabular disclosure for investments and other noncurrent assets. Long-term Investments and Other Assets [Abstract] Investment and other assets Marketable Securities, Noncurrent Marketable debt securities Equity Method Investments Equity investments in unconsolidated health care entities Other Long-term Investments Other Long-term Investments Total investments Cash Surrender Value of Life Insurance Cash surrender value of life insurance policies Deposits Assets, Noncurrent Long-term deposits Land Held-for-expansion, Long-term Receivables and Other Assets, Noncurrent Land held for expansion, long-term receivables and other assets Represents the land held for expansion, long-term receivables and other assets which are classified as noncurrent as of the balance sheet date. Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Unamortized realized losses from interest rate lock derivatives Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Adjustments for supplemental executive retirement plans Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized losses on securities held as available-for-sale Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax Tax effect allocated to adjustments for supplemental executive retirement plans Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of provision for income taxes for continuing operations Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Reconciliation between reported income tax expense (benefit) and income taxes calculated by the statutory federal income tax rate Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of components of deferred tax assets and liabilities, including any valuation allowance Schedule of Classification of Deferred Tax Assets and Liabilities [Table Text Block] Reconciliation of the deferred tax assets and liabilities and the corresponding amounts reported in the accompanying Consolidated Balance Sheets Tabular disclosure of classification of deferred tax assets and liabilities recognized in the entity's statement of financial position. Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Provision for income taxes for continuing operations Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current tax expense (benefit): Current Federal Tax Expense (Benefit) Federal Current State and Local Tax Expense (Benefit) State Current Income Tax Expense (Benefit) Total Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred tax expense (benefit): Deferred Federal Income Tax Expense (Benefit) Federal Deferred State and Local Income Tax Expense (Benefit) State Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Statutory federal rate (as a percent) Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] Reconciliation between reported income tax expense (benefit) and income taxes calculated by the statutory federal income tax rate Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate Tax expense at statutory federal rate of 35% Income Tax Reconciliation, State and Local Income Taxes State income taxes, net of federal income tax benefit Income Tax Reconciliation, Noncontrolling Interest Income (Expense) Tax attributable to noncontrolling interests Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance Other changes in valuation allowance Income Tax Reconciliation, Tax Contingencies Change in tax contingency reserves, including interest Income Tax Reconciliation, Disposition of Assets Termination of company-owned life insurance policies Income Tax Reconciliation, Prior Year Income Taxes and Change in Deferred Taxes Prior-year provision to return adjustment and other changes in deferred taxes, net of valuation allowance The portion of the difference between total income tax expense (benefit) as reported in the income statement for the current period and the expected income tax expense or benefit computed attributable to revisions of previously reported income tax expense and other changes in deferred taxes, net of valuation allowance. Income Tax Reconciliation, Other Adjustments Other items Components of Deferred Tax Assets and Liabilities [Abstract] Components of deferred tax assets and liabilities Components of Deferred Tax Assets [Abstract] Assets Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Receivables (doubtful accounts and adjustments) Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Self Insurance Accruals for retained insurance risks Deferred Tax Assets, Other Long-term Liabilities Other long-term liabilities The tax effect as of the balance sheet date of the amount of the estimated future tax reductions attributable to the difference between the tax basis and the generally accepted accounting principle basis of a company's other long-term liabilities which will decrease future taxable income when such basis difference reverses. Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Benefit plans Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Other accrued liabilities Investments and other assets Deferred Tax Assets, Investments and Other Assets The tax effect as of the balance sheet date of the amount of the estimated future tax reductions attributable to the difference between the tax basis and the generally accepted accounting principle basis of a company's investment and other assets which will decrease future taxable income when such basis difference reverses. Deferred Tax Assets, Operating Loss Carryforwards Net operating loss carryforwards Deferred tax benefit, net of valuation allowance and federal tax impact, associated with NOL carryforwards Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock-based compensation Deferred Tax Assets, Other Other items Deferred Tax Assets, Gross Deferred tax assets, gross Deferred Tax Assets, Valuation Allowance Valuation allowance Valuation allowance attributable to certain state net operating loss carryovers and federal tax credits Deferred Tax Assets, Net Deferred tax assets, net Components of Deferred Tax Liabilities [Abstract] Liabilities Deferred Tax Liabilities, Property, Plant and Equipment Depreciation and fixed-asset differences Deferred Tax Liabilities, Financing Arrangements Deferred gain on debt exchanges Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets Intangible assets Deferred Tax Liabilities Deferred tax liabilities, total Deferred Tax Assets (Liabilities), Net [Abstract] Reconciliation of the deferred tax assets and liabilities Deferred Tax Liabilities, Noncurrent Noncurrent deferred income tax liability Deferred Tax Assets (Liabilities), Net Net deferred tax asset (liability) Segment, Continuing Operations [Member] Continuing operations Segment, Discontinued Operations [Member] Discontinued operations Income Tax Contingency [Line Items] INCOME TAXES Income Tax Expense (Benefit), Change in Valuation Allowance of Deferred Tax Assets and Other Tax Adjustments Income tax (expense) benefit related to decrease in the valuation allowance for deferred tax assets and other tax adjustments Represents income tax (expense) or benefit recorded during the period related to decrease in the valuation allowance for the entity's deferred tax assets and other tax adjustments. Valuation Allowance, Deferred Tax Asset, Change in Amount Reduction in valuation allowance against deferred tax assets Income Tax Expense (Benefit), Change in Estimated Liabilities for Uncertain Tax Positions Income tax benefit (expense) from continuing operations to reduce estimated liabilities for uncertain tax positions Represents the income tax expense or benefit recorded during the period resulted from change in estimated liabilities for uncertain tax positions. Income Tax Expense (Benefit) Termination of Company Owned Life Insurance Policies Income tax benefit (expense) for termination of company-owned life insurance policies Represents the income tax expense recorded during the period resulting from termination of company-owned life insurance policies. Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Changes in unrecognized tax benefits Unrecognized Tax Benefits Balance at the beginning of the period Balance at the end of the period Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Additions for prior-year tax positions Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions Reductions for tax positions of prior years Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Additions for current-year tax positions Unrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions Reductions for current-year tax positions Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities Reductions due to settlements with taxing authorities Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations Reductions due to a lapse of statute of limitations Increase (Decrease) in Estimated Liabilities for Uncertain Tax Positions Increase (decrease) in estimated liabilities for uncertain tax positions Represents the increase (decrease) in estimated liabilities for uncertain tax positions resulted from audit settlements and the expiration of statutes of limitation. Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits which, if recognized, would impact effective tax rate Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Interest and penalties related to accrued liabilities for uncertain tax positions, recognized Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Total accrued interest and penalties on unrecognized tax benefits Income Tax Contingency [Table] Statement, Operating Activities Segment [Axis] Segment, Operating Activities [Domain] Income Tax Examination [Table] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Examination [Line Items] Audit of tax returns Income Tax Examination Tax Deficiency Asserted by Income Tax Authority Tax deficiency asserted by income tax authority Represents the tax deficiency asserted by the income tax authority in audit of the entity's tax returns. Income Tax Examination, Liability Recorded Repayment of refunds previously received Income Tax Examination, Interest from Examination Interest agreed to be paid on the repayment of the refunds previously received Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Unrecognized federal and state tax benefits and reserves for interest and penalties, which may decrease in the next 12 months Internal Revenue Service (IRS) [Member] IRS Domestic Country [Member] Federal State and Local Jurisdiction [Member] State Operating Loss Carryforwards [Line Items] Operating loss carryforwards Operating Loss Carryforwards Net operating loss carryforwards subject to expiration Tax Credit Carryforward [Table] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Alternative Minimum Tax Credit [Member] Alternative minimum tax credits Future tax reductions arising from alternative minimum tax carryforwards; a tax credit carryforward is the amount by which tax credits available for utilization exceed statutory limitations for inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization. General Business [Member] General business Range [Axis] Range [Domain] Minimum [Member] Minimum Low end of range Tax Credit Carryforward [Line Items] Tax credits Tax Credit Carryforward, Amount Tax credits carryforwards Operating Loss Carryforward, Limitation on Use, Measurement Period Rolling period during which certain ownership changes limit ability of the entity for utilization of NOL carryforwards Represents the rolling period during which certain ownership changes may limit the ability of the entity for utilization of NOL carryforwards. Operating Loss Carryforward, Limitation on Use, Percent of Shareholders Percentage of shareholders, purchase or sale of stock by them is considered as ownership change Represents the percent of shareholders whose ownership change limits the utilization of NOL carryforwards. Operating Loss Carryforward, Limitation on Use, Maximum Change Increase in Ownership Maximum increase in percentage points of the ownership of the 5% shareholders in a given period to enable the full use of NOL carryfowards Represents the maximum increase in ownership of 5% of shareholders in s given period to enable the entity to utilize its operating loss carryforward without limitation. Membership interest in Peoples Health Network (as a percent) Membership Interest Percentage Represents the percentage of membership interest in other entity who administers the operations of entity's subsidiary. Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of reconciliation of revenues for each reportable segment and other reconciling items Number of Reportable Segments Number of reportable segments Represents the number of reportable segments of the entity. Number of Hospitals Operated by Subsidiaries Represents the number of hospitals operated by subsidiaries of the entity. Number of acute care hospitals operated by subsidiaries Number of Academic Medical Centers Operated by Subsidiaries Number of academic medical centers operated by subsidiaries Represents the number of academic medical centers operated by subsidiaries of the entity. Number of Licensed Beds in Hospitals Operated by Subsidiaries Number of licensed beds in hospitals operated by subsidiaries Represents the number of licensed beds in hospitals operated by subsidiaries. Number of States in which Subsidiaries of Entity Operate Hospitals Number of states in which subsidiaries of the entity operate hospitals Represents the number of states in which subsidiaries of the entity operate hospitals. Number of Hospitals Owned by Subsidiaries Number of hospitals owned by subsidiaries Represents the Number of hospitals owned by subsidiaries. Number of Hospitals Leased by Subsidiaries from Third Parties Number of hospitals owned by third parties and leased by subsidiaries Represents the number of hospitals owned by third parties and leased by subsidiaries. Number of Medical Office Buildings Owned or Leased and Operated by Subsidiaries Number of medical office buildings owned or leased and operated by subsidiaries Represents the number of medical office buildings owned or leased and operated by subsidiaries of the entity. Number of Free Standing and Provider Based Diagnostic Imaging Centers and Ambulatory Surgery Centers Operated by Subsidiaries Number of free-standing and provider-based diagnostic imaging centers and ambulatory surgery centers operated by subsidiaries Represents the number of free-standing and provider-based diagnostic imaging centers and ambulatory surgery centers operated by subsidiaries. Number of States in which Free Standing and Provider Based Diagnostic Imaging Centers and Ambulatory Surgery Centers Operated by Subsidiaries Number of states in which free-standing and provider-based diagnostic imaging centers and ambulatory surgery centers are operated by subsidiaries Represents the number of states in which free-standing and provider-based diagnostic imaging centers and ambulatory surgery centers are operated by subsidiaries. Number of Hospitals to which Segment of the Entity Provides Revenue Cycle Services Minimum number of Tenet and non-Tenet Hospitals and other health care organizations to which Conifer provided revenue cycle services Represents the number of Tenet and non-Tenet Hospitals to which a segment of the entity provides revenue cycle services. Schedule of Segment Reporting Information, by Segment [Table] Core Services Segment [Member] Core Services Represents the Core Services a reportable segment of the entity. Conifer Segment [Member] Conifer Represents Conifer, a reportable segment of the entity. Significant Reconciling Items [Member] Corporate and other Statement, Business Segments [Axis] Segment [Domain] Segment Reporting Information [Line Items] SEGMENT INFOMRATION Adjusted Earnings before Interest Tax Depreciation and Amortization Adjusted segments EBITDA Represents the net income with interest, taxes, depreciation, and amortization added back to it, used to analyze and compare profitability between companies and industries because it eliminates the effects of financing and accounting decisions. Adjusted Segment EBITDA [Abstract] Summary of Adjusted segment EBITDA Asset Impairment Charges Impairments of long-lived assets Schedule of Other Assets [Table Text Block] Schedule of other current assets OTHER CURRENT ASSETS Prepaid Expense, Current Prepaid expenses Physician Receivables and Relocation Agreements, Current Physician receivables and relocation agreements Represents the physician receivables and relocation agreements which are due within one year as of the balance sheet date. Physician and Group Coverage Guarantees, Current Physician and group coverage guarantees Represents the physician and group coverage guarantees which are due within one year as of the balance sheet date. Disproportionate Share Hospital, Revenue Receivables Current Disproportionate share hospital revenue receivables Represents the disproportionate share hospital revenue receivables which are due within one year as of the balance sheet date. Grants Receivable, Current Grant receivable related to medical residency program Sublease Receivables, Current Sublease receivables Represents the sublease receivables which are due within one year as of the balance sheet date. Notes, Loans and Financing Receivable, Net, Current Notes receivable from asset sales Other Assets, Miscellaneous, Current Other, net Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due Other current assets past due for more than 90 days Share-based Compensation Arrangement by Share-based Payment Award by Grant Date Disclosure [Table Text Block] Schedule of information related to stock-based awards by grant date Tabular disclosure of awards granted by grant date, including exercise price of awards granted, fair value per share at grant date and compensation expense. Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of assumptions used to determine fair value of stock options Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Schedule of information about stock options by range of exercise prices Schedule of Share-based Compensation Stock Options by Monetary Status and Employment Status [Table Text Block] Schedule of stock options by monetary status and employment status of the awardees Tabular disclosure of stock options on the basis of monetary status and employment status of the awardees. Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Schedule of employee stock purchase plan activity Schedule of Net Funded Status Amounts Recognized in Balance Sheet and Assumptions Used for Projected Benefit Obligations [Table Text Block] Schedule of Reconciliation of funded status of plans, the amounts included in the Consolidated Balance Sheets and assumptions used for projected benefit obligations Tabular disclosure of funded status of plans, the amounts included in the Consolidated Balance Sheets and the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. Schedule of Expected Benefit Payments [Table Text Block] Schedule of estimated future benefits payments Stock Incentive Plan 2008 [Member] 2008 Stock Incentive Plan Represents 2008 Stock Incentive Plan which was approved by the shareholders at their 2008 annual meeting. Restricted Stock Units (RSUs) [Member] Restricted Stock Units Schedule of Share-based Compensation, Arrangement by Share-based Payment Award, by Grant Date [Axis] Represents pertinent disclosure based on the grant date of awards. Schedule of Share-based Compensation, Arrangement by Share-based Payment Award, by Grant Date [Domain] Represents the various grant dates. Grant Date 25 February 2010 [Member] Grant date, February 25, 2010 Represents grant date of awards on February 25, 2010. Grant Date 26 February 2009 One [Member] Grant date, February 26, 2009 Represents grant date of first awards on February 26, 2009. Grant Date 26 February 2009 Two [Member] Grant date, February 26, 2009 Represents grant date of second awards on February 26, 2009. Grant Date 6 March 2008 [Member] Grant date, March 6, 2008 Represents grant date of awards on March 6, 2008. Grant Date 6 May 2010 [Member] Grant date, May 6, 2010 Represents grant date of awards on May 6, 2010. Grant Date 1 March 2007 [Member] Grant date, March 1, 2007 Represents grant date of awards on March 1, 2007. Grant Date Other [Member] Grant date, Other grants Represents other grant date of awards. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] EMPLOYEE BENEFIT PLANS Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available under the plan Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Expiration period from the date of grant (in years) Share-based Compensation, Arrangement by Share-based Payment Award, Convertible in Number of Shares Contractual right to receive shares of common stock for a stock based award Represents the number of shares of common stock into which a share-based award can be converted in the future. Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period (in years) Allocated Share-based Compensation Expense Stock-based compensation costs, pretax Stock Based Compensation Expense Allocated Share-based Compensation Expense, Net of Tax Stock-based compensation costs, after tax Share-based Compensation Arrangement by Share-based Payment Award, Options Grant Date Disclosure [Abstract] Information pertaining to the awards on the basis of grant date Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Awards granted (in shares) Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercise Price Per Share (in dollars per share) Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Fair Value Per Share at Grant Date (in dollars per share) Weighted average estimated fair value of awards granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Awards granted (in shares) Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Fair Value Per Share at Grant Date (in dollars per share) Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Forfeited/Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Vested and expected to vest at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding at the beginning of the period (in dollars per share) Outstanding at the end of the period (in dollars per share) Exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Forfeited/Expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vested and expected to vest at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Vested and expected to vest at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options Weighted Average Remaining Life [Abstract] Weighted Average Remaining Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding at the end of the period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Vested and expected to vest at the end of the period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable at the end of the period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Aggregate Intrinsic Value of awards exercised Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized compensation costs Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Period for recognition of unrecognized compensation costs (in years) Share-based Compensation, Arrangement by Share-based Payment Award, Options Grants in Period Number of Employees Number of top employees to whom awards granted Represents the number of top employees to whom options were granted during the reporting period. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Assumptions used to calculate fair value of awards granted to top eleven employees Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life (in years) Share-based Compensation, Arrangement by Share-based Payment Award, Fair Value Assumptions Expected Forfeiture Rate Expected forfeiture rate (as a percent) The expected forfeiture rate assumption that is used in valuing an option on its own shares. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate (as a percent) Share-based Compensation, Arrangement by Share-based Payment Award, Fair Value Assumptions Early Exercise Threshold Early exercise threshold gain (as a percent) The early exercise threshold assumption that is used in valuing an option on its own shares. Share-based Compensation, Arrangement by Share-based Payment Award, Fair Value Assumptions Early Exercise Rate Early exercise rate, gain (as a percent) The early exercise rate assumption that is used in valuing an option on its own shares. Exercise Price Range One [Member] Range of Exercise Prices, $0.00 to $1.149 Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the first range of prices. Exercise Price Range Six [Member] Range of Exercise Prices, $28.76 and over Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the sixth range of prices. Exercise Price Range Two [Member] Range of Exercise Prices, $1.15 to $10.639 Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the second range of prices. Exercise Price Range Three [Member] Range of Exercise Prices, $10.64 to $13.959 Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the third range of prices. Exercise Price Range Four [Member] Range of Exercise Prices, $13.96 to $17.589 Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the fourth range of prices. Exercise Price Range Five [Member] Range of Exercise Prices, $17.59 to $28.759 Represents information related to options for exercise prices per share of stock options outstanding and exercisable within the fifth range of prices. Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Summary information about outstanding stock options Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Exercise price per share, low end of the range (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Exercise price per share, high end of the range (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract] Options Outstanding Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Number of Options (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual life (in years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance Weighted Average Exercise Price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period Options Exercisable [Abstract] Options Exercisable Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Number of Options (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Weighted Average Exercise Price (in dollars per share) In-the-Money Options In-The-Money Options Stock Options [Member] Information pertaining to options that are in-the-money, that is the exercise prices of the options are below the market price of the underlying entity stock price. Out-of-the-Money Options Out-of The Money Options Stock Options [Member] Information pertaining to options that are out-of-the-money, that is the exercise prices of the options are above the market price of the underlying entity stock price. Employment Status [Axis] Pertinent data describing the current employment status of an individual in relation to the entity. Employment Status [Domain] Information relating to the current employment status of an individual in relation to the entity. Current Employee [Member] Current employees Represents the current employee of the entity. Former Employee [Member] Former employees Represents the former employee of the entity. Maximum [Member] Maximum High end of range Share-based Compensation Arrangement by Share-based Payment Award Options, Outstanding, Percentage Percentage of awards outstanding The percentage of a certain classification of awards in a stock based compensation plan to the total of a particular category of awards. Share-based Compensation Arrangement by Share-based Payment Award Options, Outstanding, Percentage of Total Percentage to the total of outstanding options The percentage of a category of awards in stock based compensation plan to the total outstanding awards. Time-based Restricted Stock Units RSU [Member] Restricted stock units subject to time-vesting Time-based restricted stock units (RSUs) as awarded by a company to their employees as a form of incentive compensation. Performance-based Restricted Stock Units RSU [Member] Performance-based restricted stock units to certain of our senior officers Performance-based restricted stock units (RSUs) as awarded by a company to their employees as a form of incentive compensation. Employee Stock [Member] Employee Stock Purchase Plan Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Restricted stock unit activity Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested at the beginning of the period (in shares) Unvested at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Weighted Average Grant Date Fair Value Per Unit Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Unvested at the beginning of the period (in dollars per share) Unvested at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares authorized under plan Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock Percent Percentage of closing price at which shares are purchased by participant Represents the purchase price expressed as a percentage of the fair market value of common stock. Share-based Compensation Arrangement by Share-based Payment Award, Requisite Holding Period of Shares Requisite holding period for shares issued under plan (in years) Represents the requisite holding period for shares issued under plan. Share-based Compensation Arrangement by Share-based Payment Award, Maximum Fair Market Value of Shares Per Employee Fair market value per employee per year Represent the maximum fair market value of shares which an employee can purchase in a year. Employee Stock Purchase Plans Activity [Abstract] Employee stock purchase plan activity Stock Issued During Period, Shares, Employee Stock Purchase Plans Number of shares Stock Issued, During Period Value Per Share Employee Stock Purchase Plan Weighted average price (in dollars per share) Represents value per share for stock issued during the period as a result of employee stock purchase plan. Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] 401(k) plan Defined Contribution Plan, Employee Contribution Percentage Minimum Minimum employee contribution (as a percent of compensation) The minimum annual employee contributions to the plan as a percentage of compensation. Defined Contribution Plan, Employee Contribution Percentage Maximum Maximum employee contribution (as a percent of compensation) The maximum annual employee contributions to the plan as a percentage of compensation. Defined Contribution Plan, Requisite Working Period Per Year Minimum Requisite working period per year, minimum (in hours) Represents the minimum requisite working period per year to be eligible to receive any match from employer. Defined Contribution Plan, Employer Matching Contribution before Reduction Employer's matching contribution before reduction (as a percent) Represents the employer's matching contribution to the plan before reduction. Defined Contribution Plan, Employer Matching Contribution after Reduction Employer's matching contribution after reduction (as a percent) Represents the employer's matching contribution to the plan after reduction. Defined Contribution Plan, Cost Recognized Contribution expense Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Reconciliation of funded status of plans and the amounts included in the Consolidated Balance Sheets: Defined Benefit Plan, Benefit Obligation Beginning obligations Ending obligations Defined Benefit Plan, Service Cost Service cost Service costs Defined Benefit Plan, Interest Cost Interest cost Interest costs Defined Benefit Plan, Actuarial Net (Gains) Losses Actuarial loss Defined Benefit Plan, Benefits Paid Benefits paid Defined Benefit Plan, Fair Value of Plan Assets Fair value of plans' assets Defined Benefit Plan, Funded Status of Plan Funded status of plans Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Other current liability Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Other long-term liability Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Accumulated other comprehensive loss Defined Benefit Plan, Amounts Recognized in Balance Sheet Total Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]