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Commitments and Contingencies (Property Insurance and Other) (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |
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Jun. 30, 2011 | Dec. 31, 2010 | Jun. 30, 2011 Puerto Rico [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 California [Member] Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 High Hazard Areas [Member] Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Letters of Credit and Surety Bonds [Member] | Jun. 30, 2011 Letters of Credit and Surety Bonds [Member] Self-Insurance Programs [Member] | Jun. 30, 2011 Letters of Credit and Surety Bonds [Member] Pending Appeals of Legal Judgments [Member] | Jun. 30, 2011 Letters of Credit and Surety Bonds [Member] Other Debt Guarantees [Member] | Jun. 30, 2011 Facilities Located in Fault Zones [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 Minimum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Minimum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 Minimum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Minimum [Member] Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Minimum [Member] Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Maximum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Maximum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 Maximum [Member] Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Maximum [Member] Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Maximum [Member] Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Acute Care Facilities and Legacy Behavioral Health Care Facilities [Member] Earthquake [Member] | Jun. 30, 2011 Behavioral Health Care Facilities [Member] | Jun. 30, 2011 Behavioral Health Care Facilities [Member] Windstorm [Member] | Jun. 30, 2011 Behavioral Health Care Facilities [Member] Flood [Member] | Jun. 30, 2011 Behavioral Health Care Facilities [Member] Earth Movement [Member]
Commercial property insurance for catastrophic losses, deductible rate |  |  |  | 5.00% |  |  |  |  |  |  | 3.00% | 1.00% |  | 1.00% |  | 5.00% | 5.00% |  | 5.00% |  |  |  |  |  |  |
Commercial property insurance for catastrophic losses deductible limit per occurrence |  |  | $ 25,000,000 |  | $ 500,000 |  |  |  |  |  |  |  | $ 250,000 |  | $ 50,000 |  |  | $ 500,000 |  |  | $ 250,000 | $ 250,000 | $ 25,000 |  |  | $ 50,000
Commercial property insurance for catastrophic losses limit per occurrence |  |  |  | 50,000,000 | 25,000,000 |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  | 100,000 | 1,000,000,000 | 250,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000
Off-balance sheet contingent obligation |  |  |  |  |  | $ 76,000,000 | $ 62,000,000 | $ 7,000,000 | $ 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SWHCS pre-tax (deficit)/income from operations after income attributable to noncontrolling interest | (0.90%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SWHCS pre-tax (deficit)/income from operations after income attributable to noncontrolling interest |  | 1.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611 + Details
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