Income Taxes (Valuation Allowance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 265.5	$ 259.7	$ 241.0
Valuation Allowance, Deferred Tax Asset, Change in Amount	0.8	(5.8)
Ending balance	264.7	265.5	259.7
Increase to valuation allowance
Valuation Allowance, Deferred Tax Asset, Change in Amount	4.2	8.4	21.1
Decrease to valuation allowance
Valuation Allowance, Deferred Tax Asset, Change in Amount	(3.9)	(2.0)	(2.8)
Foreign exchange translation
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ (1.1)	$ (0.6)	$ 0.4