Accumulated Other Comprehensive Loss - Schedule of Details of Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (344.1)
Other comprehensive income (loss) before reclassifications	22.6	$ (40.5)
Less: amounts reclassified from accumulated other comprehensive loss	0.7	(4.4)	$ 7.5
Other comprehensive income (loss)	23.3	(44.9)	29.6
Balance at end of period	(549.5)	(344.1)
Intra-entity foreign currency translation adjustment	(770.6)	(837.5)
Unrecognized Pension Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	126.3	137.5
Other comprehensive income (loss) before reclassifications	(23.8)	7.3
Less: amounts reclassified from accumulated other comprehensive loss	3.7	3.9
Other comprehensive income (loss)	(20.1)	11.2
Balance at end of period	146.4	126.3	137.5
Cumulative Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	837.5	760.5
Other comprehensive income (loss) before reclassifications	66.9	(77.0)
Less: amounts reclassified from accumulated other comprehensive loss	0.0	0.0
Other comprehensive income (loss)	66.9	(77.0)
Balance at end of period	770.6	837.5	760.5
Cumulative Translation Adjustment | Intra-entity transactions
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Intra-entity foreign currency translation adjustment	12.9	(15.8)	(30.2)
Unrecognized (Losses) Gains on Derivative Instruments for Net Investment Hedge and Cash Flow Hedge | Net Investment Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	18.3	38.3
Other comprehensive income (loss) before reclassifications	(19.8)	20.0
Less: amounts reclassified from accumulated other comprehensive loss	0.0	0.0
Other comprehensive income (loss)	(19.8)	20.0
Balance at end of period	38.1	18.3	38.3
Unrecognized (Losses) Gains on Derivative Instruments for Net Investment Hedge and Cash Flow Hedge | Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(3.3)	(2.4)
Other comprehensive income (loss) before reclassifications	(0.7)	9.2
Less: amounts reclassified from accumulated other comprehensive loss	(3.0)	(8.3)
Other comprehensive income (loss)	(3.7)	0.9
Balance at end of period	0.4	(3.3)	(2.4)
Accumulated  Other Comprehensive  Loss, Net of  Taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	978.8	933.9
Balance at end of period	$ 955.5	$ 978.8	$ 933.9