Business Combinations And Divestitures (Narrative) (Details) (USD $)	7 Months Ended	12 Months Ended			7 Months Ended	12 Months Ended			12 Months Ended								12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2011	May 31, 2010	May 31, 2009	Dec. 31, 2010 Eclipsys [Member]	Dec. 31, 2011 Eclipsys [Member]	May 31, 2010 Eclipsys [Member]	Aug. 24, 2010 Eclipsys [Member]	Dec. 31, 2011 Eclipsys [Member] Pro Forma Adjustment [Member]	Jun. 30, 2010 Eclipsys [Member] Pro Forma Adjustment [Member]	May 31, 2010 Eclipsys [Member] Pro Forma Adjustment [Member]	Jun. 30, 2009 Eclipsys [Member] Pro Forma Adjustment [Member]	May 31, 2009 Eclipsys [Member] Pro Forma Adjustment [Member]	Dec. 31, 2011 Clinical Solutions [Member]	Oct. 10, 2008 Clinical Solutions [Member] Misys [Member]	Oct. 09, 2008 Clinical Solutions [Member] Misys [Member]	Dec. 31, 2011 Health Solutions [Member]	Oct. 10, 2008 Health Solutions [Member] Misys [Member]	Oct. 09, 2008 Health Solutions [Member] Misys [Member]	May 31, 2009 Prepackaged Medications Business [Member]	May 31, 2009 Prepackaged Medications Business [Member]	Oct. 10, 2008 Prepackaged Medications Business [Member] Misys [Member]
Business Acquisition [Line Items]
Merger, stock conversion ratio								1.2
Acquisition and integration-related costs					$ 36,000,000	$ 57,000,000	$ 4,000,000
Goodwill adjustment related to tax liabilities		2,360,000												0			0
Net increase in revenue									80,000,000	522,000,000		519,000,000
Net increase in net income									3,000,000	15,000,000		86,000,000
Increase in revenue									27,000,000
Decrease in revenue											2,000,000		46,000,000
Increase to amortization expense									1,000,000		21,000,000		21,000,000
Increase to interest expense									3,000,000		22,000,000		23,000,000
Increase (decrease) in stock-based compensation expense									0		7,000,000		9,000,000
Increase (decrease) in operating expenses									(72,000,000)		14,000,000		86,000,000
Acquisition-related transaction costs									15,000,000
Assumed effective income tax rate									39.00%		39.00%		39.00%
Allocated goodwill amount																259,000,000			72,000,000
Allocated amortizable intangible assets amount															181,000,000			53,000,000				3,000,000
Net proceeds from the sale of the prepackaged medications business	0	0	0	8,000,000																8,000,000
Gain loss on sale of the prepackaged medications business	$ 0	$ 0	$ 0	$ (1,588,000)																	$ 2,000,000