Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes the activity related to options during 2014:

	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In millions)
Outstanding at January 1	12,787,545		$	15.45
Options granted	816,713		26.22
Options exercised	(2,941,178	)	13.82			$	37
Options expired	(107,909	)	12.54
Options cancelled	(204,538	)	17.77
Outstanding at December 31	10,350,633		16.75		5.7	123
Vested and expected to vest at December 31	9,954,431		16.77		5.6	119
Exercisable at December 31	6,748,799		16.95		4.4	79
Available for grant at December 31	9,954,317

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

Significant option groups outstanding at December 31, 2014 and related weighted average exercise price and remaining contractual term information follows:

Grant Date	Options Outstanding	Options Exercisable	Exercise Price			Remaining Contractual Term(Years)
2/24/2014	600,801	—	$	26.44		9.2
2/28/2013	1,815,818	422,219	12.98			8.2
2/27/2012	1,433,627	666,348	12.94			7.2
2/22/2011	995,776	712,524	13.91			6.2
2/23/2010	771,769	771,769	12.74			5.2
2/26/2009	707,972	707,972	4.81			4.2
2/21/2008	976,043	976,043	26.74			3.2
2/27/2007	1,039,847	1,039,847	24.71			2.2
12/6/2005	405,944	405,944	17.15			0.9
All other	1,603,036	1,046,133	(1		)	(1	)
	10,350,633	6,748,799

_______________________________________

(1) Options in the “All other” category had exercise prices ranging from $6.22 to $36.25. The weighted average exercise price for options outstanding and exercisable in that category was $18.43 and $17.56, respectively, while the remaining weighted average contractual term was 6.0 and 4.6, respectively.

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Weighted average grant date fair values of stock options and the assumptions used in estimating those fair values are as follows:

	2014			2013			2012
Weighted average grant date fair value	$	11.48		$	6.28		$	6.33
Black-Scholes model assumptions (1):
Expected term (years)	7.40			6.25			6.25
Interest rate	2.10		%	1.11		%	1.09		%
Volatility	43.45		%	46.66		%	50.83		%
Dividend yield	0.81		%	—			—

_______________________________________

(1) We review the assumptions used in our Black-Scholes model in conjunction with estimating the grant date fair value of the annual grants of stock-based awards by our Board of Directors.

Schedule of Nonvested Share Activity [Table Text Block]

The following table summarizes the activity related to performance share units during 2014:

	Units		Weighted Average Grant Date Fair Value
Unvested at January 1	341,049		$	13.61
Units granted	143,199		29.00
Units vested	(159,806	)	13.57
Units forfeited	(2,344	)	13.63
Unvested at December 31	322,098		20.47

	Units		Weighted Average Grant Date Fair Value
Unvested at January 1	439,952		$	16.35
Units granted	259,869		25.49
Units vested and settled	(214,943	)	13.71
Units forfeited	(2,701	)	26.40
Unvested at December 31	482,177		22.36

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

Stock-based compensation expense, cash payments made to settle SARs and cash received from the exercise of stock options follows:

(In millions)	2014			2013		2012
Stock-based compensation expense recognized	$	20		$	18	$	15
Tax benefit	(7		)	—		—
After-tax stock-based compensation expense	$	13		$	18	$	15
Cash payments to settle SARs	$	2		$	1	$	—
Cash received from stock option exercises	$	39		$	22	$	4