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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2020
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Company recorded stock-based compensation of $(2) million net, due to reversal of expenses recorded in previous quarters, and $5 million expense ($(1) million and $4 million, net of tax) during the three months ended March 31, 2020 and 2019, respectively. The activity related to restricted stock units (“RSUs”) consisted of (in thousands of shares):
|  |  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (in millions)
Time-based RSUs |  |  |  |  |  |  |
| Outstanding at January 1, 2020 | 847 |  |  | $ | 36.99 |  |  |  |  |
|  | Granted (a) | 568 |  |  | 21.67 |  |  |  |  |
|  | Vested (b) | (376 | ) |  | 38.29 |  |  |  |  |
|  | Forfeited | (34 | ) |  | 38.91 |  |  |  |  |
| Outstanding and expected to vest at March 31, 2020 (c) | 1,005 |  |  | $ | 27.78 |  |  | 1.6 |  | $ | 14 |
Performance-based RSUs |  |  |  |  |  |  |
| Outstanding at January 1, 2020 | 1,061 |  |  | $ | 38.89 |  |  |  |  |
|  | Granted (a) | 515 |  |  | 21.09 |  |  |  |  |
|  | Vested (b) | (73 | ) |  | 36.64 |  |  |  |  |
|  | Forfeited | (380 | ) |  | 35.54 |  |  |  |  |
| Outstanding at March 31, 2020 | 1,123 |  |  | $ | 32.01 |  |  | 2.2 |  | $ | 16 |
| Outstanding and expected to vest at March 31, 2020 (c) | 257 |  |  | $ | 21.09 |  |  | 2.9 |  | $ | 4 |
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(a) | Reflects the maximum number of stock units assuming achievement of all performance- and time-vesting criteria and does not include those for non-employee directors. The weighted-average fair value of time-based RSUs and performance-based RSUs granted during the three months ended March 31, 2019 was $34.82.
(b) | The total fair value of RSUs vested during March 31, 2020 and 2019 was $17 million and $12 million, respectively.
(c) Aggregate unrecognized compensation expense related to time-based RSUs and performance-based RSUs amounted to $32 million and will be recognized over a weighted average vesting period of 1.9 years.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- References No definition available. + Details
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