Description of Business and Summary of Significant Accounting Policies - Reconciliation of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss) by Component	$ (11.0)
Beginning balance	1,985.1	$ 1,996.7	$ 1,922.3
Change in fair value of interest rate swap, net of tax			(11.9)
Reclassification of interest rate swap, net of tax		21.5	6.9
Pension & other post retirement benefit obligation adjustment, net of tax	7.4	3.3	(2.6)
Reclassification adjustment of pension plan, net of tax	0.1	0.6	0.4
Foreign currency translation adjustment	(103.5)	(57.5)	87.0
Change in fair value of net investment hedge, net of tax			31.2
Net current-period other comprehensive income/(loss)	(96.0)	(32.1)	111.0
Accumulated Other Comprehensive Income (Loss) by Component	(107.0)	(11.0)
Ending balance	2,002.4	1,985.1	1,996.7
Gains and (Losses) on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss) by Component		(21.5)	(16.5)
Change in fair value of interest rate swap, net of tax			(11.9)
Reclassification of interest rate swap, net of tax		21.5	6.9
Net current-period other comprehensive income/(loss)		21.5	(5.0)
Accumulated Other Comprehensive Income (Loss) by Component			(21.5)
Pension & Other Post Retirement Benefit Plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss) by Component	0.2	(3.7)	(1.5)
Pension & other post retirement benefit obligation adjustment, net of tax	7.4	3.3	(2.6)
Reclassification adjustment of pension plan, net of tax	0.1	0.6	0.4
Net current-period other comprehensive income/(loss)	7.5	3.9	(2.2)
Accumulated Other Comprehensive Income (Loss) by Component	7.7	0.2	(3.7)
Cumulative Foreign Currency Translation Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss) by Component	(11.2)	46.3	(71.9)
Foreign currency translation adjustment	(103.5)	(57.5)	87.0
Change in fair value of net investment hedge, net of tax			31.2
Net current-period other comprehensive income/(loss)	(103.5)	(57.5)	118.2
Accumulated Other Comprehensive Income (Loss) by Component	(114.7)	(11.2)	46.3
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(11.0)	21.1	(89.9)
Ending balance	$ (107.0)	$ (11.0)	$ 21.1