Goodwill and Other Intangible Assets - Other Intangible Assets, Changes in Net Carrying Amount (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gross Amount
Other intangible assets, beginning	$ 618.7	$ 645.7
Finite-Lived Intangible Assets, Disposal of Intangible Assets	(13.4)	(25.8)
Currency translation effect on foreign balances	(0.9)	(1.2)
Other intangible assets, ending	604.4	618.7	$ 645.7
Accumulated Amortization
Other intangible assets, beginning	(74.8)	(72.6)
Amortization of Intangible Assets, Adjustment for Disposal	13.4	20.7
Amortization expense	(18.8)	(22.9)	(24.4)
Currency translation effect on foreign balances	0.2	0.0
Other intangible assets, ending	$ (80.0)	$ (74.8)	$ (72.6)