Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2021	Apr. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Equity [Abstract]
Shares issued (in shares)	16.9
Common stock, par value (in dollars per share)	$ 0.01				$ 0.01
Stock price (in dollars per share)	$ 91.00
Proceeds from sale of stock	$ 1,500.0
Dividend declared (in dollars per share)			$ 0.78	$ 0.78
Common stock, dividends, per share, cash paid (in dollars per share)		$ 0.78	$ 0.78