Supplemental Financial Data - Deferred Tax Asset Valuation Allowance (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 37.0	$ 39.4	$ 36.6
Additions charged (credited) to costs and expenses	0.9	0.6	4.2
Additions charged (credited) due to foreign currency fluctuations	1.3	(3.0)	(1.6)
Additions charged (credited) to other accounts			0.2
Balance at end of period	$ 39.2	$ 37.0	$ 39.4