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Stock-Based Compensation and Stockholders' Equity - Additional Information (Details) - USD ($) |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 01, 2020 | Jun. 19, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Nov. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  | $ 39.00 |  |  |  |  |
Sale of stock, consideration received on transaction |  | $ 772,000,000 |  |  |  |  |
Payments of stock issuance costs |  | $ 35,000,000 |  |  |  |  |
Stock-based compensation expense |  |  | $ 45,000,000 | $ 4,000,000 | $ 55,000,000 | $ 16,000,000 |
Exercise of stock options (in shares) |  |  |  |  | 26,900 |  |
Options outstanding (in shares) |  |  | 220,432 |  | 220,432 |  |
Options exercisable (in shares) |  |  | 104,257 |  | 104,257 |  |
Subsequent Event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Sale of stock, shares issued in transaction (in shares) | 35,650,000 |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ 56.00 |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ 1,900,000,000 |  |  |  |  |  |
Payments of stock issuance costs | $ 50,000,000 |  |  |  |  |  |
Public Stock Offering |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Sale of stock, shares issued in transaction (in shares) |  | 20,700,000 |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Equity instruments other than options, fair value |  |  | $ 42,000,000 |  | $ 59,000,000 |  |
Granted (in shares) |  |  |  |  | 1,222,736 |  |
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition |  |  |  |  | 1 year 8 months 12 days |  |
Vested (in shares) |  |  |  |  | (1,068,509) |  |
Unrecognized compensation expense |  |  | 103,000,000 |  | $ 103,000,000 |  |
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, nonvested |  |  | 7,000,000 |  | 7,000,000 |  |
Market-based Stock Units (MSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, nonvested |  |  | $ 13,000,000 |  | $ 13,000,000 |  |
Granted (in shares) |  |  | 185,639 |  | 185,639 |  |
Award vesting period |  |  | 3 years |  |  |  |
Vested (in shares) |  |  |  |  | (61,322) |  |
Market-based Stock Units (MSUs) | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage |  |  | 0.00% |  |  |  |
Market-based Stock Units (MSUs) | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage |  |  | 200.00% |  |  |  |
Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 150,000,000
Treasury stock (in shares) |  |  | 223,823 |  | 223,823 |  |
Common stock acquired value |  |  |  |  | $ 9,000,000 |  |
Common stock acquired average price per share (in dollars per share) |  |  |  |  | $ 40.80 |  |
Common stock shares acquired (in shares) |  |  |  |  | 0 | 0 |

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