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Stockholders' Equity (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Oct. 28, 2021 | Apr. 30, 2021 | Feb. 28, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Increase (decrease) in authorization amount |  |  |  |  |  | $ 325,300,000 | $ 211,400,000
Treasury stock, acquired (in shares) | 4,100,000 | 0 | 14,100,000 | 2,600,000 |  |  |
Value of treasury stock acquired | $ 190,000,000.0 |  | $ 551,400,000 | $ 187,500,000 |  |  |
Payments for repurchase of common stock |  |  | 551,400,000 | 187,500,000 |  |  |
Subsequent Event |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Authorized amount of stock to be repurchased |  |  |  |  | $ 600,000,000 |  |
Performance-based Restricted Stock Units |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Value of treasury stock acquired | 300,000 | $ 100,000 | 14,400,000 | $ 12,100,000 |  |  |
February 2016 Program |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Remaining shares under share repurchase authorization | $ 186,900,000 |  | $ 186,900,000 |  |  |  |

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