Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Pre-Tax Compensation Expense and Related Income Tax Benefit for Stock-Based Incentives

Pre-tax compensation expense and the related income tax benefit for these stock-based incentives were as follows, in millions:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Long-term stock awards	$	7	$	9	$	27	$	28
Stock options		2		3		12		12
Phantom stock awards and stock appreciation rights		3		2		6		8
Total	$	12	$	14	$	45	$	48
Income tax benefit (37 percent tax rate — before valuation allowance)	$	5	$	5	$	17	$	18

Company's Long-Term Stock Award Activity

The Company’s long-term stock award activity was as follows, shares in millions:

	Nine Months Ended September 30,
	2013		2012
Unvested stock award shares at January 1		8		10
Weighted average grant date fair value	$	16	$	17
Stock award shares granted		2		1
Weighted average grant date fair value	$	20	$	12
Stock award shares vested		2		2
Weighted average grant date fair value	$	17	$	18
Stock award shares forfeited		—		1
Weighted average grant date fair value	$	17	$	17
Unvested stock award shares at September 30		8		8
Weighted average grant date fair value	$	17	$	16

Company's Stock Option Activity

The Company’s stock option activity was as follows, shares in millions:

	Nine Months Ended
	September 30,
	2013			2012
Option shares outstanding, January 1		30			36
Weighted average exercise price	$	21		$	21
Option shares granted, including restoration options		1			1
Weighted average exercise price	$	20		$	12
Option shares exercised		3			1
Aggregate intrinsic value on date of exercise (A)	$	22	million	$	4	million
Weighted average exercise price	$	12		$	9
Option shares forfeited		1			3
Weighted average exercise price	$	23		$	18
Option shares outstanding, September 30		27			33
Weighted average exercise price	$	22		$	21
Weighted average remaining option term (in years)		4			5
Option shares vested and expected to vest, September 30		27			33
Weighted average exercise price	$	22		$	21
Aggregate intrinsic value (A)	$	91	million	$	39	million
Weighted average remaining option term (in years)		4			5
Option shares exercisable (vested), September 30		22			25
Weighted average exercise price	$	24		$	24
Aggregate intrinsic value (A)	$	51	million	$	17	million
Weighted average remaining option term (in years)		3			4

(A) Aggregate intrinsic value is calculated using the Company’s stock price at each respective date, less the exercise price (grant date price) multiplied by the number of shares.

Weighted Average Grant Date Fair Value of Option Shares Granted and Assumptions Used to Estimate Those Values Using Black-Scholes Option Pricing Model

The weighted average grant date fair value of option shares granted and the assumptions used to estimate those values using a Black-Scholes option pricing model were as follows:

	Nine Months Ended
	September 30,
	2013			2012
Weighted average grant date fair value	$	8.35		$	4.44
Risk-free interest rate		1.22	%		1.09	%
Dividend yield		1.47	%		2.57	%
Volatility factor		49.07	%		50.97	%
Expected option life		6 years			6 years