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Stockholders' Equity - Repurchase of Common Stock (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Aug. 02, 2021 | May 02, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, remaining authorizations | $ 375,000,000 |  | $ 375,000,000 |  |  |
Number of shares repurchased (in shares) | 2,133,020 | 0 | 6,058,054 | 0 |  |
Value of shares repurchased | $ 122,400,000 |  | $ 297,800,000 |  |  |
Shares acquired, average price per share (in usd per share) | $ 57.36 |  | $ 49.16 |  |  |
Common Stock |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, authorized increase |  |  |  |  |  | $ 1,000,000,000.0
Number of shares repurchased (in shares) |  |  | 35,100 |  |  |
Value of shares repurchased | $ 1,600,000 |  | $ 1,600,000 |  |  |
Common Stock | New Share Repurchase Program | Subsequent Event |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 1,000,000,000.0 |

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