Shareholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) Balances (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2023	$ (57.5)
Reclassification to the statement of income	(11.2)
Change in fair value	(17.6)
Balance as of September 30, 2024	(86.3)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2023	(62.6)
Balance as of September 30, 2024	(77.5)
Cash Flow Hedging | Foreign currency contracts
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2023	1.7
Reclassification to the statement of income	(10.7)
Change in fair value	(2.7)
Balance as of September 30, 2024	(11.7)
Retirement Plan Activity
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2023	3.4
Reclassification to the statement of income	(0.5)
Balance as of September 30, 2024	$ 2.9