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Commitments And Contingencies (Professional And General Liability) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  | 10 Months Ended | 12 Months Ended |
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Dec. 31, 2011 PSI Subsidiaries [Member] | Dec. 31, 2011 PSI Subsidiaries [Member] Minimum [Member] | Dec. 31, 2011 PSI Subsidiaries [Member] Maximum [Member] | Dec. 31, 2011 Professional And General Liability [Member] | Dec. 31, 2007 Professional And General Liability [Member] | Dec. 31, 2011 Professional And General Liability [Member] Minimum [Member] | Dec. 31, 2011 Professional And General Liability [Member] Maximum [Member] | Dec. 31, 2011 Professional And General Liability [Member] PSI Subsidiaries [Member] | Dec. 31, 2010 Professional And General Liability [Member] PSI Subsidiaries [Member] | Dec. 31, 2009 Professional And General Liability [Member] PSI Subsidiaries [Member] | Oct. 31, 2010 Professional And General Liability [Member] PSI Subsidiaries [Member] Minimum [Member] | Oct. 31, 2010 Professional And General Liability [Member] PSI Subsidiaries [Member] Maximum [Member] | Dec. 31, 2011 Professional And General Liability [Member] PSI Subsidiaries [Member] Maximum [Member] | Dec. 31, 2011 Professional And General Liability [Member] Legacy Subsidiaries [Member] Maximum [Member] | Dec. 31, 2011 Professional And General Liability [Member] Subsidiaries [Member] | Dec. 31, 2011 Professional And General Liability [Member] Subsidiaries [Member] Minimum [Member] | Dec. 31, 2011 Professional And General Liability [Member] Subsidiaries [Member] Maximum [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Self-insured exposure per occurrence |  |  |  | $ 10 |  |  |  |  |  |  |  |  | $ 3 | $ 10 |  |  |
Commercial insured exposure per occurrence |  |  |  |  | 20 | 10 | 200 |  |  |  |  |  |  |  |  |  |
Percentage of liability for claims paid under commercially insured coverage |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Liability for claims paid pursuant to commercially insured coverage, amount |  |  |  |  |  | 10 | 60 |  |  |  |  |  |  |  |  |  |
Commercial self-insured retention |  | 3 | 10 |  |  |  |  |  |  |  | 3 |  |  |  |  | 10 | 60
Commercial self-insured retention cap | 200 |  |  |  |  |  |  |  |  |  |  | 75 |  |  |  |  |
Total liability claims accrual including estimated claims related to facilities acquired |  |  |  |  |  |  |  | 292 | 289 |  |  |  |  |  |  |  |
Professional and general claims included in current liabilities |  |  |  |  |  |  |  | 60 |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  |  |  |  |  | 60 |  |  |  |  |  |  |  |
Reduction in professional and general liability self-insurance reserves relating to prior years |  |  |  |  |  |  |  | $ 11 | $ 49 | $ 23 |  |  |  |  |  |  |
Weighting given to company-specific metrics |  |  |  |  |  |  |  |  | 75.00% | 50.00% |  |  |  |  |  |  |
General industry metrics |  |  |  |  |  |  |  |  | 25.00% | 50.00% |  |  |  |  |  |  |

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- Definition Aggregate carrying amount, as of the balance sheet date, of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed in the balance sheet. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6911-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6904-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 6 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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