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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2014
Stock-Based Compensation |
Schedule of pre-tax compensation expense and the related income tax benefit for these 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 |
|  | March 31, |
|  | 2014 |  | 2013 |
Long-term stock awards |  | $ | 11 |  | $ | 9 |
Stock options |  | 1 |  | 5 |
Phantom stock awards and stock appreciation rights |  | — |  | 3 |
Total |  | $ | 12 |  | $ | 17 |
Income tax benefit (37 percent tax rate - before valuation allowance) |  | $ | 4 |  | $ | 6 |
Schedule of the Company's long-term stock award activity | The Company’s long-term stock award activity was as follows, shares in millions:
|  | Three Months Ended |
|  | March 31, |
|  | 2014 |  | 2013 |
Unvested stock award shares at January 1 |  | 8 |  | 8 |
Weighted average grant date fair value |  | $ | 17 |  | $ | 16 |
Stock award shares granted |  | 1 |  | 2 |
Weighted average grant date fair value |  | $ | 22 |  | $ | 20 |
Stock award shares vested |  | 2 |  | 2 |
Weighted average grant date fair value |  | $ | 17 |  | $ | 16 |
Stock award shares forfeited |  | — |  | — |
Weighted average grant date fair value |  | $ | 18 |  | $ | 18 |
Unvested stock award shares at March 31 |  | 7 |  | 8 |
Weighted average grant date fair value |  | $ | 18 |  | $ | 17 |
Schedule of the Company's stock option activity | The Company’s stock option activity was as follows, shares in millions:
|  | Three Months Ended |
|  | March 31, |
|  | 2014 |  | 2013 |
Option shares outstanding, January 1 |  |  | 24 |  |  | 30 |
Weighted average exercise price |  | $ | 22 |  | $ | 21 |
Option shares granted |  |  | — |  |  | 1 |
Weighted average exercise price |  | $ | 22 |  | $ | 20 |
Option shares exercised |  |  | 1 |  |  | 2 |
Aggregate intrinsic value on date of exercise (A) |  | $ | 10 million |  | $ | 17 million |
Weighted average exercise price |  | $ | 16 |  | $ | 11 |
Option shares forfeited |  |  | — |  |  | — |
Weighted average exercise price |  | $ | 27 |  | $ | 19 |
Option shares outstanding, March 31 |  |  | 23 |  |  | 29 |
Weighted average exercise price |  | $ | 22 |  | $ | 22 |
Weighted average remaining option term (in years) |  |  | 4 |  |  | 4 |
Option shares vested and expected to vest, March 31 |  |  | 23 |  |  | 29 |
Weighted average exercise price |  | $ | 22 |  | $ | 22 |
Aggregate intrinsic value (A) |  | $ | 93 million |  | $ | 82 million |
Weighted average remaining option term (in years) |  |  | 4 |  |  | 4 |
Option shares exercisable (vested), March 31 |  |  | 20 |  |  | 23 |
Weighted average exercise price |  | $ | 23 |  | $ | 24 |
Aggregate intrinsic value (A) |  | $ | 72 million |  | $ | 45 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.
Schedule of 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 | 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:
|  | Three Months Ended |
|  | March 31, |
|  | 2014 |  | 2013 |
Weighted average grant date fair value |  | $ | 9.53 |  | $ | 8.33 |
Risk-free interest rate |  | 1.91 | % | 1.20 | %
Dividend yield |  | 1.34 | % | 1.47 | %
Volatility factor |  | 49.00 | % | 49.00 | %
Expected option life |  | 6 years |  | 6 years |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units 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 significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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