Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Stock-Based Compensation Expense

	2011			2010			2009
	(in millions)
Stock-based compensation expense by type:
Stock options	$	16		$	22		$	20
Restricted stock awards		51			41			46
Total stock-based compensation expense		67			63			66
Tax benefit recognized		(25	)		(23	)		(24	)
Stock-based compensation expense, net of tax	$	42		$	40		$	42

Weighted-Average Fair Value Of Stock Options

	2011			2010			2009
Weighted-average fair value at grant date	$	28.29		$	19.58		$	14.24
Expected option life (years)		4.8			5.2			4.6
Expected volatility		46.8	%		43.8	%		39.2	%
Risk-free interest rate at grant date		1.7	%		2.7	%		1.9	%
Dividend yield(1)		0.5	%		None			None

(1) As discussed in Note 14, in April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy.

Activity For Option Plans

	Shares Under Option			Weighted-Average Exercise Price
	(shares in thousands)
Options outstanding at December 31, 2010		5,795		$	46.86
Granted		448			71.79
Exercised		(3,079	)		43.63
Forfeited		(20	)		43.66
Options outstanding at December 31, 2011		3,144		$	53.60
Options exercisable at December 31, 2011		1,552		$	55.68

Activity For Restricted Stock Awards

	Shares			Weighted- Average Grant-Date Fair Value
	(shares in thousands)
Nonvested restricted stock awards at December 31, 2010		2,459		$	51.38
Granted		1,291			67.70
Vested		(584	)		67.87
Forfeited		(250	)		56.70
Nonvested restricted stock awards at December 31, 2011		2,916		$	53.93