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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 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 |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Long-term stock awards |  | $ | 11 |  |  | $ | 11 |  |  | $ | 20 |  |  | $ | 19 |
Stock options |  |  | 5 |  |  |  | 4 |  |  |  | 10 |  |  |  | 9 |
Phantom stock awards and stock appreciation rights |  |  | — |  |  |  | 1 |  |  |  | 3 |  |  |  | 6 |
Total |  | $ | 16 |  |  | $ | 16 |  |  | $ | 33 |  |  | $ | 34 |
Income tax benefit (37 percent tax rate – before valuation allowance) |  | $ | 6 |  |  | $ | 6 |  |  | $ | 12 |  |  | $ | 13 |
Company's Long-Term Stock Award Activity | The Company’s long-term stock award activity was as follows, shares in millions:
|  | Six Months Ended |
|  | June 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 |  | $ | 16 |  |  | $ | 17 |
Stock award shares forfeited |  |  | — |  |  |  | — |
Weighted average grant date fair value |  | $ | 18 |  |  | $ | 18 |
Unvested stock award shares at June 30 |  |  | 8 |  |  |  | 9 |
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:
|  | Six Months Ended |
|  | June 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 |  |  | 2 |  |  |  | — |
Aggregate intrinsic value on date of exercise (A) |  | $ | 21 million |  |  | $ | 1 million |
Weighted average exercise price |  | $ | 11 |  |  | $ | 9 |
Option shares forfeited |  |  | 1 |  |  |  | 3 |
Weighted average exercise price |  | $ | 23 |  |  | $ | 19 |
Option shares outstanding, June 30 |  |  | 28 |  |  |  | 34 |
Weighted average exercise price |  | $ | 22 |  |  | $ | 21 |
Weighted average remaining option term (in years) |  |  | 4 |  |  |  | 5 |
Option shares vested and expected to vest, June 30 |  |  | 28 |  |  |  | 34 |
Weighted average exercise price |  | $ | 22 |  |  | $ | 21 |
Aggregate intrinsic value (A) |  | $ | 69 million |  |  | $ | 29 million |
Weighted average remaining option term (in years) |  |  | 4 |  |  |  | 5 |
Option shares exercisable (vested), June 30 |  |  | 23 |  |  |  | 26 |
Weighted average exercise price |  | $ | 24 |  |  | $ | 24 |
Aggregate intrinsic value (A) |  | $ | 37 million |  |  | $ | 15 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:
|  | Six Months Ended |
|  | June 30, |
|  | 2013 |  |  | 2012 |
Weighted average grant date fair value |  | $ | 8.33 |  |  | $ | 4.44 |
Risk-free interest rate |  |  | 1.20 | % |  |  | 1.10 | %
Dividend yield |  |  | 1.47 | % |  |  | 2.57 | %
Volatility factor |  |  | 49.00 | % |  |  | 51.00 | %
Expected option life |  |  | 6 years |  |  |  | 6 years |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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