Stock-Based Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Incentive Plan [Abstract]

Stock Option Activity

	Number of Shares Under Option			Weighted Average Exercise Price per Share
Outstanding at December 31, 2008		23,423,041		$	15.32
Options granted		5,426,354			13.74
Options exercised		(1,354,218	)		11.59
Options forfeited		(1,226,499	)		14.50
Outstanding at December 31, 2009		26,268,678		$	15.22
Options granted		2,575,039			20.47
Options exercised		(3,900,514	)		14.03
Options forfeited		(1,103,154	)		15.09
Outstanding at December 31, 2010		23,840,049		$	15.99
Options granted		4,943,178			22.40
Options exercised		(4,514,170	)		15.09
Options forfeited		(669,801	)		19.05
Outstanding at December 31, 2011		23,599,256		$	17.42
Vested and expected to vest at December 31, 2011		22,503,933		$	17.32
Options exercisable at December 31, 2011		15,584,220		$	16.05

Status Of Company's Nonvested Restricted Stock And Restricted Stock Unit Awards And Changes

	Number of Restricted Stock Awards			Weighted  Average Grant-Date Fair Value Per Share
Nonvested at December 31, 2010		2,339,410		$	15.36
Granted		1,392,690			22.47
Released		(1,126,827	)		13.20
Forfeited		(84,786	)		17.87
Nonvested at December 31, 2011		2,520,487		$	20.16

Stock-Based Compensation Plans, Valuation Assumptions

	Year Ended December 31, 2011	Year Ended December 31, 2010	Year Ended December 31, 2009
Volatility	33.0%	30.8%	37.8%
Risk-free interest rate	2.4%	2.5%	2.4%
Expected term of options (in years)	6.0	5.7	5.7
Forfeiture rate	5.5%	5.5%	5.5%
Weighted average grant date fair value per option	$8.13	$6.89	$5.43