Equity - Summary of Dividends Paid and Stock Repurchases and Retirements (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Dividends
Per share (in dollars per share)	$ 0.20		$ 0.19
Amount	$ 65.5		$ 66.2
Repurchased under the 2018 Stock Repurchase Program
Amount	$ 243.2		$ 2.9
Forward contract under ASR		$ 40.0
Stock Repurchase Program 2018
Repurchased under the 2018 Stock Repurchase Program
Shares (in shares)	10.3		0.0
Treasury Stock Acquired, Average Cost Per Share	$ 23.83		$ 0
Amount	$ 200.0		$ 0.0