Stock-Based Employee Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Employee Compensation Plans [Abstract]

Additional information with respect to restricted stock units and performance units

	Restricted Stock Units					Performance Units*
				Weighted Average					Weighted Average
	Number			Grant Date		Number			Grant Date
	of Shares			Fair Value		of Shares			Fair Value
Nonvested, January 1, 2011		3,159,265		$	46.93		1,384,230		$	52.02
Granted		866,646			60.58		525,459			64.34
Vested		(999,272	)		49.64		(771,883	)		45.60
Forfeited		(192,839	)		51.62		(3,763	)		65.00
Nonvested, December 31, 2011		2,833,800			49.83		1,134,043			62.01

Stock option pricing weighted average assumptions

	2011			2010			2009
Risk-free interest rate		2	.4%		2	.5%		2	.0%
Expected volatility		24	.2%		25	.0%		23	.8%
Dividend yield		2	.6%		2	.9%		3	.4%
Expected average term (in years)		5	.5		5	.2		5	.4

Additional information with respect to stock options

						Weighted Average
	Number			Weighted Average		Remaining		Aggregate
	of Shares			Exercise Price		Contractual Term		Intrinsic Value
						(in years)		(in millions)
Outstanding, January 1, 2011		3,158,696		$	37.58
Granted		38,753			60.56
Exercised		(1,425,571	)		37.99
Forfeited		(47,438	)		39.31
Outstanding, December 31, 2011		1,724,440			37.71		1.9		54
Exercisable, December 31, 2011		1,594,577			36.66		1.4		52