Goodwill and Intangible Assets (Changes to Intangible Assets) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived and Indefinite-Lived Intangible Assets [Roll Forward]
Balance at beginning of period, net of accumulated amortization	$ 344.9	$ 388.5
Amortization expense	(27.0)	(36.0)
Currency translation and other	(3.6)	(7.6)
Balance at end of period, net of accumulated amortization	$ 314.3	$ 344.9