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Equity - Stock Repurchases (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Aug. 31, 2020 | Sep. 30, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Repurchase of common stock | $ 19,474,000 | $ 200,000,000 |  |
2018 Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Aggregate authorized amount of common stock to be repurchased (up to) |  |  |  | $ 500,000,000
2020 Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Aggregate authorized amount of common stock to be repurchased (up to) |  |  | $ 500,000,000 |
2018 and 2020 Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Amount remaining under stock repurchase programs | $ 519,100,000 |  |  |

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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