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
	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%