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Stockholders' Equity - Additional Information (Details) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 23, 2019 | May 05, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 22, 2020
Class of Stock [Line Items] |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  | 1,125,000,000 | 1,125,000,000 |  |
Common stock, par value (in dollars per share) |  |  | $ 0.2 | $ 0.2 |  |
Common stock shares outstanding (in shares) |  |  | 421,000,000 |  |  |
Common shares unissued but encumbered (in shares) |  |  | 37,000,000 |  |  |
Common stock dividend per common share |  |  | $ 0.12 |  |  |
Common stock dividends |  |  |  | $ 0 | $ 0 |
Aggregate purchase price (not to exceed) | $ 200,000,000 |  |  |  |  |
Common stock repurchased (in shares) | 17,000,000 |  | 16,962,199 | 0 | 0 |
Repurchase amount | $ 167,000,000 |  | $ 33,000,000 |  |  |
Subsequent Event |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Aggregate purchase price (not to exceed) |  |  |  |  |  | $ 600,000,000
Series A Preferred Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares outstanding (in shares) |  | 3,300,000 | 0 | 0 |  |
Preferred stock dividend rate (as a percentage) |  | 6.97% |  |  |  |
Preferred stock dividend rate (in dollars per share) |  | $ 50 |  |  |  |
Series B Preferred Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares outstanding (in shares) |  |  | 4,000,000.0 | 4,000,000 |  |
Preferred stock liquidation preference (in dollars per share) |  |  | $ 100 |  |  |
Series B Preferred Stock | Three Month LIBOR |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock dividend rate (as a percentage) |  |  | 1.70% |  |  |
Common Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Share price (in dollars per share) |  |  | $ 8.91 |  |  |

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