Stock Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Award activity — (shares in millions)

											Restricted					Performance
	Options					SARs					Stock Units					Notional Shares
				Weighted-					Weighted-					Weighted-					Weighted-
				Average					Average					Average					Average
				Exercise					Exercise					Grant-Date					Grant-Date
Outstanding at	Shares			Price		Shares			Price		Shares			Fair Value		Shares			Fair Value
December 31, 2011		4.6		$	8.56		0.5		$	8.13		0.9		$	16.51		0.4		$	14.95
Granted		0.7			15.93		0.2			15.85		0.6			15.83		0.1			16.00
Exercised or vested		(1.8	)		5.35		(0.2	)		2.67		(0.3	)		16.21		(0.5	)		15.10
Forfeited or expired		(0.2	)		13.93							(0.1	)		16.20
December 31, 2012		3.3		$	11.73		0.5		$	12.62		1.1		$	16.24		-		$	-

	2012		2011		2010
Weighted-average per share grant-date fair value
Stock options	$	7.88	$	9.43	$	7.23
SARs		7.84		9.89		6.99

Intrinsic value of awards exercised or vested
Stock options / SARs	$	18	$	26	$	38
RSUs / PSUs		11		10		14

Key Assumptions as Part of Black-Scholes Option Pricing Model

We estimated fair values for options and SARs at the date of grant using the following key assumptions as part of the Black-Scholes option pricing model. The expected term was estimated using the simplified method because the limited period of time our common stock has been publicly traded provides insufficient historical exercise data. The risk-free rate was based on U.S. Treasury security yields at the time of grant. The dividend yield was calculated by dividing the expected annual dividend by the average stock price of our common stock over the prior year. There is no dividend yield assumption for years 2011 and 2010 since there were no plans to pay common stock dividends at that time. The expected volatility was estimated using a combination of the historical volatility of similar entities and the implied volatility of our exchange-traded options.

	Options									SARs
	2012			2011			2010			2012			2011			2010
Expected term (in years)		6.00			6.00			6.00			6.00			6.00			6.00
Risk-free interest rate		1.24	%		2.63	%		2.74	%		1.24	%		2.66	%		2.75	%
Dividend yield		1.33	%		0.00	%		0.00	%		1.33	%		0.00	%		0.00	%
Expected volatility		59.90	%		58.03	%		66.15	%		59.90	%		58.16	%		66.10	%

Outstanding Awards Expected to Vest and Exercisable

Outstanding awards expected to vest and exercisable or convertible at December 31, 2012 — (shares in millions)

	Equity Awards Outstanding								Equity Awards Outstanding
	Expected to Vest								That are Exercisable or Convertible
					Weighted-Average								Weighted-Average
			Aggregate				Remaining				Aggregate				Remaining
			Intrinsic		Exercise		Contractual				Intrinsic		Exercise		Contractual
	Shares		Value		Price		Life in Years		Shares		Value		Price		Life in Years
Options / SARs		3.7	$	15	$	11.77		7.0		2.3	$	14	$	9.39		6.0
RSUs		1.1		17		-		1.4		0.1		1		-		0.3