Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-based Compensation [Abstract]

Summary of stock options outstanding and exercised under various stock options plans

Year Ended December 31	Stock Options/Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value (in millions)
2011
Number outstanding at beginning of period		85,622,705		$	26.80
Granted		4,063,369			28.66
Exercised		(8,508,107	)		19.49
Cancelled (a)		(5,354,026	)		28.44
Number outstanding at end of period (b)		75,823,941		$	27.60		5.2	$	(42	)
Exercisable at end of period		57,039,334		$	29.14		4.4	$	(120	)
2010
Number outstanding at beginning of period		88,379,469		$	26.49
Granted		5,417,631			23.98
Exercised		(5,769,586	)		19.38
Cancelled (a)		(2,404,809	)		27.03
Number outstanding at end of period (b)		85,622,705		$	26.80		5.5	$	15
Exercisable at end of period		57,542,065		$	28.28		4.4	$	(76	)
2009
Number outstanding at beginning of period		82,293,011		$	29.08
Granted		14,316,237			12.04
Exercised		(1,085,328	)		19.98
Cancelled (a)		(7,144,451	)		28.33
Number outstanding at end of period (b)		88,379,469		$	26.49		6.1	$	(352	)
Exercisable at end of period		50,538,048		$	27.52		4.5	$	(253	)

(a) Options cancelled include both non-vested (i.e., forfeitures) and vested options.

(b) Outstanding options include stock-based awards that may be forfeited in future periods. The impact of the estimated forfeitures is reflected in compensation expense.

Weighted average estimated fair value and assumptions utilized by company for newly issued grants

Year Ended December 31	2011			2010			2009
Estimated fair value	$	10.55		$	8.36		$	3.39
Risk-free interest rates		2.5	%		2.5	%		1.8	%
Dividend yield		2.5	%		3.0	%		4.2	%
Stock volatility factor		.47			.47			.44
Expected life of options (in years)		5.5			5.5			5.5

Stock option activity of the company

Year Ended December 31 (Dollars in Millions)	2011		2010		2009
Fair value of options vested	$	54	$	61	$	74
Intrinsic value of options exercised		61		35		3
Cash received from options exercised		165		112		22
Tax benefit realized from options exercised		23		13		1

Stock options outstanding additional information

	Outstanding Options						Exercisable Options
Range of Exercise Prices	Shares		Weighted- Average Remaining Contractual Life (Years)		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
$11.02 - $15.00		10,225,221		7.1	$	11.42		4,141,927	$	11.43
$15.01 - $20.00		212,080		4.4		19.28		182,151		19.50
$20.01 - $25.00		10,530,634		4.3		22.68		6,814,608		22.05
$25.01 - $30.00		17,848,881		4.8		29.12		13,566,583		29.32
$30.01 - $35.00		27,400,486		5.2		31.65		22,727,835		31.55
$35.01 - $36.25		9,606,639		5.0		36.07		9,606,230		36.07
		75,823,941		5.2	$	27.60		57,039,334	$	29.14

Summary of the status of the Company's restricted shares of stock and unit awards

	2011					2010					2009
Year Ended December 31	Shares			Weighted- Average Grant- Date Fair Value		Shares			Weighted- Average Grant- Date Fair Value		Shares			Weighted- Average Grant-Date Fair Value
Nonvested Shares
Outstanding at beginning of period		8,811,027		$	19.74		6,788,203		$	16.68		2,420,535		$	32.42
Granted		3,136,086			28.20		4,398,660			24.05		5,435,363			12.09
Vested		(2,552,979	)		20.15		(1,862,228	)		18.71		(869,898	)		31.84
Cancelled		(398,839	)		22.20		(513,608	)		20.00		(197,797	)		16.52
Outstanding at end of period		8,995,295	(a)	$	22.46		8,811,027		$	19.74		6,788,203		$	16.68

(a) Includes maximum number of shares to be received by participants under awards that are based on the achievement of certain future performance criteria by the Company.