v2.4.0.8

Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2014
Share-Based Compensation [Abstract] |
Schedule of Weighted-Average Assumptions Used to Determine the Weighted-Average Fair Values |
|  | Three Months Ended March 31,
|  | 2014
Weighted-average risk free interest rate |  |  | 0.79%
Expected volatility(1) |  |  | 29.1%
Weighted-average fair value at grant date |  | $ | 43.13
(1) We use historic volatility for PSU awards issued under the TSR program, as implied volatility cannot be used when simulating multivariate prices for companies in the S&P 500.
Summary of Share-Based Compensation Expense |
|  | Three Months Ended March 31,
|  | 2014 |  | 2013
|  | (in millions)
Share-based compensation expense before income taxes |  | $ | 14 |  | $ | 9
Income tax benefit |  |  | (6) |  |  | (4)
Share-based compensation expense after income taxes |  | $ | 8 |  | $ | 5
Summary of Stock Option Activity |
|  | Number of Stock Options(1) |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term |  | Aggregate Intrinsic Value
|  |  |  |  |  |  |  | (in years) |  | (in millions)
Outstanding at January 1, 2014 |  |  | 4,926,522 |  | $ | 25.21 |  |  | 4.97 |  | $ | 73
Exercised |  |  | (367,115) |  |  | 19.39 |  |  |  |  |  |
Forfeited or expired |  |  | (27,401) |  |  | 22.67 |  |  |  |  |  |
Outstanding at March 31, 2014 |  |  | 4,532,006 |  | $ | 25.70 |  |  | 4.76 |  | $ | 52
Exercisable at March 31, 2014 |  |  | 4,472,845 |  | $ | 25.72 |  |  | 4.73 |  | $ | 51
(1) No stock option awards were gra nted during the three months ended March 31, 2014.
Summary of Restricted Stock And PSU Activity |
|  | Restricted Stock |  | PSUs
|  | Number of Awards |  | Weighted-Average Grant Date Fair Value |  | Number of Awards |  | Weighted-Average Grant Date Fair Value
Unvested balances at January 1, 2014 |  |  | 3,826,470 |  | $ | 25.96 |  |  | 1,915,601 |  | $ | 30.03
Granted |  |  | 953,178 | (1) |  | 36.94 |  |  | 787,906 | (2) |  | 40.31
Vested |  |  | (1,337,866) |  |  | 22.60 |  |  | (56,659) |  |  | 25.28
Forfeited |  |  | (72,342) |  |  | 27.38 |  |  | (77,344) |  |  | 27.16
Unvested balances at March 31, 2014 |  |  | 3,369,440 |  | $ | 30.35 |  |  | 2,569,504 |  | $ | 33.37
(1) Primarily reflects our company-wide equity grant issued in March 201 4, as discussed above. (2) PSUs granted in 201 4 reflect awards issued to certain officers, as described above.

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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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