Commitments And Contingencies (Property Insurance And Other) (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2011
Puerto Rico [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	$ 25,000,000
California [Member] | Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	5.00%
Commercial property insurance for catastrophic losses limit per occurrence	50,000,000
High Hazard Areas [Member] | Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	500,000
Commercial property insurance for catastrophic losses limit per occurrence	25,000,000
Letters Of Credit And Surety Bonds [Member]
Loss Contingencies [Line Items]
Off-balance sheet contingent obligation	86,000,000
Letters Of Credit And Surety Bonds [Member] | Self-Insurance Programs [Member]
Loss Contingencies [Line Items]
Off-balance sheet contingent obligation	62,000,000
Letters Of Credit And Surety Bonds [Member] | Pending Appeals Of Legal Judgments [Member]
Loss Contingencies [Line Items]
Off-balance sheet contingent obligation	7,000,000
Letters Of Credit And Surety Bonds [Member] | Other Debt Guarantees [Member]
Loss Contingencies [Line Items]
Off-balance sheet contingent obligation	17,000,000
Facilities Located In Fault Zones [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses limit per occurrence	100,000,000
Minimum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	3.00%
Minimum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	1.00%
Minimum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	250,000
Minimum [Member] | Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	1.00%
Minimum [Member] | Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	50,000
Maximum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	5.00%
Maximum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	5.00%
Maximum [Member] | Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	500,000
Maximum [Member] | Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses, deductible rate	5.00%
Maximum [Member] | Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses limit per occurrence	100,000
Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	250,000
Commercial property insurance for catastrophic losses limit per occurrence	1,000,000,000
Acute Care Facilities And Legacy Behavioral Health Care Facilities [Member] | Earthquake [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	250,000
Commercial property insurance for catastrophic losses limit per occurrence	250,000,000
Behavioral Health Care Facilities [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	25,000
Commercial property insurance for catastrophic losses limit per occurrence	100,000,000
Behavioral Health Care Facilities [Member] | Windstorm [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses limit per occurrence	100,000,000
Behavioral Health Care Facilities [Member] | Flood [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses limit per occurrence	100,000,000
Behavioral Health Care Facilities [Member] | Earth Movement [Member]
Loss Contingencies [Line Items]
Commercial property insurance for catastrophic losses deductible limit per occurrence	50,000
Commercial property insurance for catastrophic losses limit per occurrence	$ 100,000,000