Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Gross cost at January 1	$ 291.1
Additions	4.3
Exchange effect	(0.6)
Gross cost at March 31	296.3		$ 291.1
Accumulated amortization at January 1	(246.1)
Amortization expense	(2.7)	$ (4.0)
Exchange effect	0.9
Accumulated amortization at March 31	249.4
Net book amount at March 31	$ 46.9		$ 45.0