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Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock Options Roll Forward | A summary of award activity by type for the nine months ended September 30, 2019 is presented below.
Stock Options |  | Awards (in millions) |  | Weighted- Average Exercise Price |  | Aggregate Intrinsic Value (in millions) |  | Weighted Average Remaining Contractual Life (years)
Outstanding at January 1, 2019 |  | 7.2 |  |  | $ | 19.32 |  |  |  |  |
Granted |  | 0.8 |  |  | 26.91 |  |  |  |  |
Exercised |  | (3.6 | ) |  | 12.63 |  |  |  |  |
Forfeited |  | (0.8 | ) |  | 28.94 |  |  |  |  |
Outstanding at September 30, 2019 |  | 3.6 |  |  | $ | 25.77 |  |  |  |  |
Vested and expected to vest at September 30, 2019 |  | 3.6 |  |  | $ | 25.77 |  |  | $ | 17.6 |  |  | 6.12
Exercisable at September 30, 2019 |  | 2.5 |  |  | $ | 24.84 |  |  | $ | 15.3 |  |  | 5.02
Schedule of Restricted Stock Units and Restricted Stock Awards Roll Forward |
Restricted Stock Awards and Restricted Stock Units |  | Awards/Units (millions) |  | Weighted-Average Fair Value
Outstanding at January 1, 2019 |  | 1.6 |  |  | $ | 29.12 |
Granted |  | 0.7 |  |  | 26.98 |
Vested |  | (0.7 | ) |  | 28.53 |
Forfeited |  | (0.4 | ) |  | 28.56 |
Outstanding at September 30, 2019 |  | 1.2 |  |  | $ | 28.38 |
Schedule of Performance Stock Roll Forward |
Performance Stock Awards and Performance Share Units |  | Awards/Units (millions) |  | Weighted-Average Fair Value
Outstanding at January 1, 2019 |  | 0.8 |  |  | $ | 31.82 |
Granted |  | 0.3 |  |  | 29.10 |
Vested |  | — |  |  | — |
Forfeited |  | (0.6 | ) |  | 30.38 |
Outstanding at September 30, 2019 |  | 0.5 |  |  | $ | 32.11 |

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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 change in stock options. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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