Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2010

Stock Based Compensation (Tables) [Abstract]

Summary of stock option activity and related information

				Weighted-
				Average		Aggregate
				Exercise		Intrinsic
Stock Options	Options			Price		Value
	(Millions)					(Millions)
Outstanding at December 31, 2009		13.0		$	16.73
Granted		1.3		$	21.20
Exercised		(1.2	)	$	6.11	$	20
Expired		(0.3	)	$	40.89
Forfeited		(0.1	)	$	17.71
Outstanding at December 31, 2010		12.7		$	17.59	$	109
Exercisable at December 31, 2010		9.8		$	17.44	$	86

Summary of outstanding and exercisable stock options

	Stock Options Outstanding						Stock Options Exercisable
					Weighted-						Weighted-
			Weighted-		Average				Weighted-		Average
			Average		Remaining				Average		Remaining
			Exercise		Contractual				Exercise		Contractual
Range of Exercise Prices	Options		Price		Life		Options		Price		Life
	(Millions)				(Years)		(Millions)				(Years)
$2.27 to $11.82		5.4	$	8.85		4.6		4.0	$	8.18		3.4
$11.83 to 21.38		4.0	$	19.53		5.4		2.8	$	18.75		3.6
$21.39 to $30.94		2.0	$	25.14		5.3		2.0	$	25.14		5.3
$30.95 to $40.51		1.3	$	36.17		5.3		1.0	$	36.06		4.7
Total		12.7	$	17.59		5.0		9.8	$	17.44		4.0

Estimated fair value at date of grant of options for common stock granted

	2010			2009			2008
Weighted-average grant date fair value of options for our common stock granted during the year	$	7.02		$	5.60		$	12.83
Weighted-average assumptions:
Dividend yield		2.6	%		1.6	%		1.2	%
Volatility		39.0	%		60.8	%		33.4	%
Risk-free interest rate		3.0	%		2.3	%		3.5	%
Expected life (years)		6.5			6.5			6.5

Summary of nonvested restricted stock unit activity and related information

				Weighted-
				Average
Restricted Stock Units	Shares			Fair Value*
	(Millions)
Nonvested at December 31, 2009		6.1		$	16.24
Granted		2.1		$	21.05
Forfeited		(0.1	)	$	19.87
Cancelled		(0.5	)	$	0.00
Vested		(1.0	)	$	28.67
Nonvested at December 31, 2010		6.6		$	16.97

* Performance-based shares are primarily valued using the end-of-period market price until certification that the performance objectives have been completed, a value of zero once it has been determined that it is unlikely that performance objectives will be met, or a valuation pricing model. All other shares are valued at the grant-date market price.

Other restricted stock unit information

	2010		2009		2008
Weighted-average grant date fair value of restricted stock units granted during the year, per share	$	21.05	$	10.23	$	30.13
Total fair value of restricted stock units vested during the year ($’s in millions)	$	29	$	28	$	48