Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income before taxes:
Total income before income taxes	$ 400.4	$ 322.6	$ 135.6
United States
Income before taxes:
Total income before income taxes	7.0	(12.5)	(4.8)
Foreign
Income before taxes:
Total income before income taxes	$ 393.4	$ 335.1	$ 140.4