Share Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Share-Based Compensation [Abstract]
Options outstanding, Beginning Balance, Shares	28,932,000
Options outstanding, Beginning Balance, Weighted Average Exercise Price	$ 18.73
Granted, Shares	931,000	32,115	10,015,883
Granted, Weighted Average Exercise Price	$ 15.67
Vested options exercised by employees , shares	(1,116,000)	700,000	1,500,000
Exercised, Weighted-Average Exercise Price	$ 12.50
Surrendered, Shares	(418,000)
Surrendered, Weighted Average Exercise Price	$ 13.53
Forfeited, Shares	(459,000)
Forfeited, Weighted Average Exercise Price	$ 20.74
Options outstanding, Ending Balance, Shares	27,870,000	28,932,000
Options outstanding, Ending Balance, Weighted Average Exercise Price	$ 18.94	$ 18.73
Options outstanding, Ending Balance, Weighted Average Remaining Contractual Term	3.65
Options outstanding, Ending Balance, Aggregate Intrinsic Value	$ 83,306
Options exercisable, Ending Balance, Shares	24,939,000	24,900,000	27,200,000
Options exercisable, Ending Balance, Weighted Average Exercise Price	$ 19.83	$ 20.19	$ 21.04
Options exercisable, Ending Balance, Weighted Average Remaining Contractual Term	3.14
Options exercisable, Ending Balance, Aggregate Intrinsic Value	$ 65,949