Income Taxes Schedule of Earnings (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings before income taxes	$ 365.4	$ 475.2	$ 475.2
U.S.
Earnings before income taxes, U.S.	151.4	211.1	151.4
Non-U.S.
Earnings before income taxes, Non-U.S.	$ 214.0	$ 264.1	$ 323.8