Document - Document and Entity Information [Abstract] Document and Entity Information Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Trading Symbol Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Entity Public Float Entity Voluntary Filers Entity Current Reporting Status Entity Well-known Seasoned Issuer Consolidated Balance Sheets ASSETS Current assets: Cash and cash equivalents Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value, Total Investments in Reserve Yield Plus Fund Investments in marketable securities Marketable Securities, Current, Total Accounts receivable, less allowance for doubtful accounts ($352 at December 31, 2010 and $369 at December 31, 2009) Accounts receivable, less allowance for doubtful accounts ($355 at September 30, 2010 and $369 at December 31, 2009) Accounts receivable, less allowance for doubtful accounts ($352 at December 31, 2010 and $369 at December 31, 2009) and $369 at December 31, 2009) Accounts receivable, less allowance for doubtful accounts ($0 at December 31, 2010 and $369 at December 31, 2009) Inventories of supplies, at cost Inventory, Net, Total Income tax receivable Current portion of deferred income taxes Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Assets held for sale Assets Held-for-sale, Current, Total Other Assets Current Other current assets Total current assets Total current assets LongTermInvestmentsAndReceivablesNet Long-term Investments and Receivables, Net, Total Investments and other assets Deferred income taxes, net of current portion Deferred Tax Assets, Net, Noncurrent, Total Property and equipment, at cost, less accumulated depreciation and amortization ($3,100 at December 31, 2010 and $2,970 at December 31, 2009) ($0 at December 31, 2010 and $2,970 at December 31, 2009) Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment, at cost, less accumulated depreciation and amortization ($0 at December 31, 2010 and $2,970 at December 31, 2009) Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Other intangible assets, at cost, less accumulated amortization ($302 at December 31, 2010 and $257 at December 31, 2009) Other intangible assets, at cost, less accumulated amortization ($0 at December 31, 2010 and $257 at December 31, 2009) Intangible Assets, Net (Excluding Goodwill), Total Total assets Total assets LIABILITIES AND EQUITY Current liabilities: Current portion of long-term debt Capital leases and mortgage notes Long-term Debt and Capital Lease Obligations, Current, Total Accounts payable Accounts Payable, Current, Total Accrued compensation and benefits Employee-related Liabilities, Current, Total Represents the current portion of the carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's' compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. Self Insurance Reserve, Current Professional and general liability reserves Accrued interest payable Litigation Reserve, Current Accrued legal settlement costs Other current liabilities Other Liabilities, Current, Total Total current liabilities Total current liabilities Long Term Debt And Capital Lease Obligations Long-term Debt and Capital Lease Obligations, Total Long-term debt, net of current portion Self Insurance Reserve Self insurance reserve Professional and general liability reserves Litigation Reserve, Noncurrent Accrued legal settlement costs Other Liabilities, Noncurrent Other Liabilities, Noncurrent, Total Other long-term liabilities Deferred income taxes Total liabilities Total liabilities Commitments and contingencies Equity: Shareholders' equity: 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 December 31, 2010 and 2009 Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Common stock, $0.05 par value; authorized 1,050,000,000 shares; 550,882,110 shares issued at December 31, 2010 and 538,610,856 shares issued at December 31, 2009 Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock, $0.05 par value; authorized 1,050,000,000 shares; 0 shares issued at December 31, 2010 and 538,610,856 shares issued at December 31, 2009 Additional paid-in capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total AccumulatedOtherComprehensiveIncomeLossNetOfTax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated deficit Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Less common stock in treasury, at cost, 0 shares at December 31, 2010 and 57,475,602 shares at December 31, 2009 Less common stock in treasury, at cost, 65,098,918 shares at December 31, 2010 and 57,475,602 shares at December 31, 2009 Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Less common stock in treasury, at cost, 0 shares at December 31, 2010 and 57,475,602 shares at December 31, 2009 Total shareholders' equity Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total shareholders' equity Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Total equity Balances Balances Total equity Total liabilities and equity Total liabilities and equity Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Property and equipment, accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Other intangible assets, accumulated amortization Preferred stock, par value Preferred stock, authorized Preferred stock, liquidation preference Preferred stock, shares issued Preferred Stock, Shares Issued, Total Common stock, par value Common stock, authorized Common stock, shares issued Common Stock, Shares, Issued, Total Common stock in treasury, shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Consolidated Statements of Operations Net operating revenues Health Care Organization, Revenue, Total Operating expenses: Salaries, wages and benefits Labor and Related Expense, Total Supplies Provision for doubtful accounts Other operating expenses, net Other Cost and Expense, Operating, Total Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction, Total Impairment of long-lived assets and goodwill, and restructuring charges, net of insurance recoveries Restructuring, Settlement and Impairment Provisions, Total Litigation and investigation costs Litigation and investigation costs, net of insurance recoveries Gain (Loss) Related to Litigation Settlement, Total Operating income Operating income Interest Expense Interest expense Interest Expense, Total Gain from early extinguishment of debt (Gain) loss from early extinguishment of debt Gains (Losses) on Extinguishment of Debt, Total Gain (loss) from early extinguishment of debt Investment earnings Gain (Loss) on Investments, Total Net gain on sales of investments Net gain on sales of investments Gain (Loss) on Sale of Investments, Total Sum of operating profit and nonoperating income (expense) before income (loss) from income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. Income (loss) from continuing operations, before income taxes Income from continuing operations, before income taxes Income tax benefit (expense) Income tax benefit Income Tax Expense (Benefit), Total Income from continuing operations, before discontinued operations Income from continuing operations, before discontinued operations Discontinued operations: Income (loss) from operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax, Total 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). Discontinued Operation Restructuring Settlement And Impairment Provisions Before Income Tax Impairment of long-lived assets and goodwill, and restructuring charges, net Impairment of long-lived assets and goodwill, and restructuring charges, net Litigation settlements, net of insurance recoveries Litigation settlements, net of insurance recoveries Litigation settlements, net of insurance recoveries Litigation settlements, net of insurance recoveries Net gains (losses) on sales of facilities Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax, Total Discontinued Operation, Tax Effect of Discontinued Operation Income tax (expense) benefit Discontinued Operation, Tax Effect of Discontinued Operation, Total Loss from discontinued operations Income (loss) from discontinued operations Profit Loss Net income Net income Net income Less: Preferred stock dividends Preferred stock dividends Less: Preferred stock dividends Preferred Stock Dividends, Total Preferred stock dividend Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest, Total Net income Net income attributable to Tenet Healthcare Corporation common shareholders Amounts attributable to Tenet Healthcare Corporation common shareholders Income from continuing operations, net of tax Income (loss) from Continuing Operations Attributable to Parent, Total Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total Earnings Per Share, Basic [Abstract] Basic Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Continuing Operations, Per Outstanding Share, Total Continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Share, Total Discontinued operations Earnings Per Share, Basic Earnings Per Share, Basic, Total Earnings Per Share, Diluted [Abstract] Diluted Income (Loss) from Continuing Operations, Per Diluted Share Continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share, Total Discontinued operations Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Weighted average shares and dilutive securities outstanding (in thousands): Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Basic Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Diluted Consolidated Statements of Other Comprehensive Income Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss): Other Comprehensive Income, Defined Benefit Plan's Adjustment, before Tax Adjustments for supplemental executive retirement plans Other Comprehensive Income, Defined Benefit Plan's Adjustment, before Tax, Total Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Unrealized gains (losses) on securities held as available-for-sale Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Reclassification adjustments for realized losses included in net income Other comprehensive income (loss) before income taxes Other comprehensive income (loss) before income taxes Income tax (expense) benefit related to items of other comprehensive income (loss) Other Comprehensive Income (Loss), Tax, Total Total other comprehensive income (loss), net of tax Other comprehensive income (loss) Total other comprehensive income (loss), net of tax Comprehensive income (loss) Comprehensive income Comprehensive Income, Net of Tax, Attributable to Noncontrolling Interest Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income, Net of Tax, Attributable to Noncontrolling Interest, Total Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income (loss) attributable to Tenet Healthcare Corporation common shareholders Comprehensive income attributable to Tenet Healthcare Corporation common shareholders Consolidated Statements of Changes in Equity Balances, shares Balances, shares Balances, shares Distributions paid to noncontrolling interests Contributions from noncontrolling interests Proceeds from issuance of mandatory convertible preferred stock Issuance of mandatory convertible preferred stock Issuance of mandatory convertible preferred stock, shares Issuance of mandatory convertible preferred stock, shares Issuance of mandatory convertible preferred stock, shares Stock Issued During Period, Value, Share-based Compensation Stock-based compensation expense and issuance of common stock Stock Issued During Period, Shares, Share-based Compensation Stock-based compensation expense and issuance of common stock, shares Consolidated Statements of Cash Flows Adjustments to reconcile net income to net cash provided by operating activities: Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit), Total Stock-based compensation expense Share-based Compensation, Total Fair market value adjustments related to interest rate swap and LIBOR cap agreements Fair market value adjustments related to interest rate swap and LIBOR cap agreements Amortization of Financing Costs Amortization of debt discount and issue costs Pre-tax loss from discontinued operations Pre-tax (gain) loss from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax, Total Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Other Other items, net Changes in cash from operating assets and liabilities: Accounts receivable Accounts receivable 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. Increase Decrease In Inventories And Other Assets Current Inventories and other current assets Inventories and other current assets Increase (Decrease) in Income Taxes Receivable Income taxes Accounts payable, accrued expenses and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Increase (Decrease) in Other Operating Liabilities Other long-term liabilities Payments against reserves for restructuring charges and litigation costs, which may include attorneys' fees and other litigation costs. 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 Net cash provided by operating activities from discontinued operations, excluding income taxes Net cash provided by operating activities Net cash provided by operating activities Cash flows from investing activities: 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. Payments To Acquire Property Plant And Equipment For Continuing Operations Purchases of property and equipment-continuing operations The cash outflow from construction costs to date on new and replacement hospitals. Construction Of New And Replacement Hospitals Construction of new and replacement hospitals 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 discontinued operations and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Payments To Acquire Property Plant And Equipment For Discontinued Operations Purchases of property and equipment-discontinued operations Purchases of businesses or joint venture interest Purchases of business or joint venture interest Proceeds from sales of facilities and other assets-discontinued operations 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. Proceeds From Sale Of Marketable Securities Long Term Investments And Other Assets Proceeds from sales of marketable securities, long-term investments and other assets Purchases of marketable securities Purchases of marketable securities Payments to Acquire Marketable Securities, Total 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. Distributions Received From Reclassification Of Reserve Fund Distributions received from (reclassification of) investments in Reserve Yield Plus Fund Proceeds from hospital authority bonds Proceeds from Sale and Maturity of Other Investments, Total Proceeds from cash surrender value or basis reduction of insurance policies Proceeds from cash surrender value or basis reduction of insurance policies Proceeds from cash surrender value or basis reduction of insurance policies Increase (Decrease) in Restricted Cash Release of escrow funds Increase (Decrease) in Restricted Cash, Total Release of escrow funds Payments for (Proceeds from) Other Investing Activities Other items, net Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Cash flows from financing activities: Repayments of borrowings Repayments of borrowings Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities, Total Proceeds from borrowings Proceeds from Issuance of Long-term Debt and Capital Securities, Net, Total Deferred debt issuance costs Deferred debt issuance costs Cash dividends on preferred stock Cash dividends on preferred stock Payments Of Dividends Minority Interest Distributions paid to noncontrolling interests Distributions paid to noncontrolling interests Proceeds from (Payments for) Other Financing Activities Other items, net Net cash used in financing activities Net cash provided by (used in) financing activities Net increase (decrease) in cash and cash equivalents Net increase (decrease) in cash and cash equivalents Supplemental disclosures: Interest paid, net of capitalized interest Interest paid, net of capitalized interest Interest Paid, Net, Total 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. Proceeds from interest rate swap agreement Proceeds from interest rate swap agreement Income tax (payments) refunds, net Income Taxes Paid, Net, Total Significant Accounting Policies Significant Accounting Policies [Text Block] Significant Accounting Policies Equity StockholdersEquityNoteDisclosureTextBlock Equity Accounts Receivable and Allowance for Doubtful Accounts Schedule Of Accounts Notes Loans And Financing Receivable Text Block Accounts Receivable and Allowance for Doubtful Accounts Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Impairment and Restructuring Charges Description of impairment and restructuring activities including exit activities, which should include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled. For long-lived assets to be held and used by an entity, disclosures may include a description of the impaired long-lived asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. Restructuring And Impairment Charges Disclosure Text Block Impairment and Restructuring Charges Long-Term Debt and Lease Obligations Long Term Debt [Text Block] Long-Term Debt and Lease Obligations Guarantees [Abstract] Guarantees Schedule Of Guarantee Obligations Text Block Guarantees Employee Benefit Plans Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Employee Benefit Plans Other Current Assets [Abstract] Other Current Assets Disclosure of current assets not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). Other Current Assets [Text Block] Other Current Assets Property and Equipment Property, Plant and Equipment [Text Block] Property and Equipment Goodwill and Other Intangible Assets Goodwil lAnd Intangible Assets Disclosure Text Block Goodwill and Other Intangible Assets Investments and Other Assets Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments and Other Assets Accumulated Other Comprehensive Loss ComprehensiveIncomeNoteTextBlock Accumulated Other Comprehensive Loss Property And Professional and General Liability Insurance. Property and Professional and General Liability Insurance Description of insurance coverage used by the entity to manage the financial risk of malpractice claims (including general and professional liability) and property, business interruption and related insurance coverage . Disclosure may include a discussion of the entity's risk management policies, a description of the insurance arrangements (including type, coverage, coverage limits, and deductible), description of the insurer, and whether the entity is self insured or retains significant self-insurance risk. Property Professional And General Liability Insurance Disclosure Text Block Property and Professional and General Liability Insurance Claims And Lawsuits. Claims and Lawsuits Commitments And Contingencies Disclosure [Text Block] Claims and Lawsuits Income Taxes ncomeTaxDisclosureTextBlock Income Taxes Earnings Per Common Share EarningsPerShareTextBlock Earnings Per Common Share Fair Value Measurements [Abstract] Fair Value Measurements FairValueMeasurementInputsDisclosureTextBlock Fair Value Measurements Acquisitions BusinessCombinationDisclosureTextBlock Acquisitions Sales of Investments Gain Loss On Investments Text Block Sales of Investments Recent Accounting Standards ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock Recent Accounting Standards Subsequent Events [Abstract] Subsequent Events SUBSEQUENT EVENTS [Text Block] Subsequent Events Selected Quarterly Financial Data Quarterly Financial Information [Text Block] Selected Quarterly Financial Data Valuation And Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule 2 Valuation and Qualifying Accounts Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Actual [Member] Preferred Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Deficit [Member] Treasury Stock [Member] Noncontrolling Interests [Member]