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Equity - Additional Information (Details) - USD ($) shares in Millions, $ in Millions			6 Months Ended
		Jul. 18, 2019	Jun. 30, 2019	Jun. 30, 2018
Dividends Payable [Line Items]
Dividend paid	[1]		$ 106.0	$ 44.6
Shares repurchased under repurchase program (in shares)			2.6
Stock repurchase program, remaining authorized repurchase amount			$ 800.0
Subsequent Event
Dividends Payable [Line Items]
Dividend paid		$ 52.3
[1] See Note 15 regarding quarterly cash dividend.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount remaining of a stock repurchase plan authorized.

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