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Business And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount charged at established rates for charity care and uninsured discounts | $ 956,000,000 | $ 807,000,000 | $ 671,000,000
Percentage of uninsured discount extended for unqualified charity patients | 20.00% |  |
Establishment of partial reserve in the allowance for doubtful accounts for self-pay balances outstanding from the date of discharge, in days | 60 |  |
Establishment of fully reserve for self-pay balances outstanding from the date of discharge, in days | 90 |  |
Establishment of fully reserve in the allowance for doubtful accounts for third party liability accounts from the date of discharge, in days | 180 |  |
Net of allowance for doubtful accounts | 253,000,000 | 249,000,000 |
Capitalize interest expense | 400,000 | 7,600,000 | 11,600,000
Depreciation expense | 268,500,000 | 202,800,000 | 184,600,000
Other intangible assets, net of accumulated amortization | 97,000,000 | 100,000,000 |
Amount of estimated future payments related to physician-related contractual commitments | 7,000,000 | 8,000,000 |
Amount of potential future financial obligations | 6,000,000 |  |
Amount of potential future financial obligations year one | 4,000,000 |  |
Amount of potential future financial obligations year two | 2,000,000 |  |
Workers' compensation reserves analyses |  | 4,000,000 | 7,000,000
Acute care facilities with outside owners holding noncontrolling minority interest | 5 |  |
Redeemable noncontrolling interest balances | 218,000,000 | 212,000,000 |
Noncontrolling interest balances | 51,000,000 | 45,000,000 |
Net excess tax benefits generated | 0 | 0 | 0
Anti-dilutive weighted average stock options excluded from computation of earnings per share | 1,400,000 | 1,000 | 3,600,000
Charity care and uninsured discounts based on charges at established rates | 956,000,000 | 807,000,000 |
Estimated cost of providing the charity services | 173,000,000 | 158,000,000 |
Medicare And Medicaid [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of revenue | 37.00% | 38.00% | 38.00%
Care Entities [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of revenue | 43.00% | 46.00% | 46.00%
Las Vegas, Nevada [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of revenue | 16.00% | 21.00% | 22.00%
Illinois [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable | 54,000,000 |  |
Receivables due outstanding in excess of 60 days | $ 41,000,000 |  |
Receivables days in excess | 60 |  |
McAllen/Edinburg, Texas [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of revenue | 5.00% | 6.00% | 7.00%
Acute Care Facility [Member] | Las Vegas, Nevada [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 28.00% |  |
Acute Care Facility [Member] | Washington, D.C. [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 20.00% |  |
Acute Care Facility [Member] | Laredo, Texas [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 11.00% |  |
Behavioral Health Care Facility [Member] | Philadelphia, Pennsylvania [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of noncontrolling, minority ownership interests held by outside owners | 20.00% |  |
Buildings And Improvements [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Property and equipment, useful lives, minimum years | 20 |  |
Property and equipment, useful lives, maximum years | 40 |  |
Equipment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Property and equipment, useful lives, minimum years | 3 |  |
Property and equipment, useful lives, maximum years | 15 |  |

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