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Earnings Per Share | 3 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share:
| Three Months Ended March 31,
| 2017 |  | 2016
| (in millions, except share and per share amounts)
Numerator: |  |  |
Net income attributable to common shareholders | $ | 169 |  |  | $ | 132 |
Denominator: |  |  |
Weighted-average common shares outstanding for basic earnings per share | 166,473,073 |  |  | 164,281,692 |
Weighted-average effect of dilutive securities: |  |  |
Employee equity awards | 3,773,874 |  |  | 4,086,752 |
Weighted-average common shares outstanding for diluted earnings per share | 170,246,947 |  |  | 168,368,444 |
Basic and diluted earnings per share: |  |  |
Basic earnings per share | $ | 1.02 |  |  | $ | 0.80 |
Diluted earnings per share | $ | 0.99 |  |  | $ | 0.78 |
Stock options to purchase 1,634,772 shares of common stock and 4,245,457 shares of restricted stock and PSUs were outstanding at March 31, 2017. For the three months ended March 31, 2017, we included 1,365,955 of the outstanding stock options and 3,293,769 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted-average basis, as their inclusion was dilutive. The remaining stock options, shares of restricted stock and PSUs are antidilutive, and as such, they were properly excluded. Stock options to purchase 2,539,676 shares of common stock and 5,594,549 shares of restricted stock and PSUs were outstanding at March 31, 2016. For the three months ended March 31, 2016, we included all of the outstanding stock options and 4,533,893 shares of restricted stock and PSUs in the computation of diluted earnings per share, on a weighted-average basis, as their inclusion was dilutive. The remaining shares of restricted stock and PSUs are antidilutive, and as such, they were properly excluded. See “Recently Adopted Accounting Pronouncements,” of Note 2, “Basis of Presentation and Principles of Consolidation,” for the impact of the adoption of ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting" on diluted earnings per share.

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