Equity - Cash Dividends on Shares of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders' Equity Note [Abstract]
Cash dividends declared per share of common stock (in dollars per share)	$ 0.20		$ 0.20
Amount	$ 64.7	$ 66.3	$ 129.9	$ 131.8