Reduction Of Misys Share Ownership (Details) (Misys [Member], USD $) In Millions, unless otherwise specified	0 Months Ended			12 Months Ended
	Nov. 17, 2010	Aug. 27, 2010	Jun. 08, 2010	Dec. 31, 2011
Misys [Member]
Business Acquisition [Line Items]
Common stock shares held by Misys			80
Aggregate voting power percentage			55.00%
Outstanding shares reduced ownership, percentage	4.00%	10.00%
Excess of the repurchase price over par				$ 679