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Equity - Additional Information (Details) - USD ($) shares in Millions, $ in Millions |  | 3 Months Ended
--- | --- | ---
Apr. 18, 2019 | Mar. 31, 2019 | Mar. 31, 2018
Dividends Payable [Line Items] |  |  |  |
Dividend paid | [1] |  | $ 53.2 | $ 22.3
Shares repurchased under repurchase program (in shares) |  |  | 1.3 |
Stock repurchase program, remaining authorized repurchase amount |  |  | $ 900.0 |
Subsequent Event |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Dividend paid |  | $ 52.8 |  |
[1] | See Note 15 regarding quarterly cash dividend.

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