Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gross cost at January 1	$ 298.9	$ 294.8
Exchange effect	(3.7)	4.1
Gross cost at December 31	295.2	298.9	$ 294.8
Accumulated amortization at January 1	(223.6)	(181.3)
Amortization expense	(16.0)	(20.9)	(23.0)
Impairment	0.0	(19.8)	0.0
Exchange effect	1.9	(1.6)
Accumulated amortization at December 31	(237.7)	(223.6)	$ (181.3)
Net book amount at December 31	$ 57.5	$ 75.3