Schedule - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 78.4	$ 60.1	$ 58.6
Additions Charged (Credited) to Expense	5.1	22.5	12.4
Deductions / Other Additions to Reserve	(5.1)	(7.6)	(9.0)
Effects of Foreign Currency	(3.3)	3.4	(1.9)
Balance at End of Period	75.1	78.4	60.1
Deferred Tax Asset Valuation Allowances [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	463.2	460.1	527.3
Additions Charged (Credited) to Expense	(3.1)	3.0	(2.6)
Deductions / Other Additions to Reserve	3.7	2.0	(61.5)
Effects of Foreign Currency	0.8	(1.9)	(3.1)
Balance at End of Period	$ 464.6	$ 463.2	$ 460.1