Pension and Post-Employment Benefits - Fair Value of Pension Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair value of pension assets
Total plan assets	$ 35.1	$ 48.1
Non-US [Member]
Fair value of pension assets
Debt securities	443.4	436.1
Cash	15.8	16.0
Total plan assets	459.2	452.1
Non-US [Member] | Debt Securities Issued by Non-U.S. Government and Government Agencies [Member]
Fair value of pension assets
Debt securities	4.7	4.3
Non-US [Member] | Corporate Debt Securities [Member]
Fair value of pension assets
Debt securities	0.0	0.0
Non-US [Member] | Insurance Contracts [Member]
Fair value of pension assets
Debt securities	438.7	431.8
Non-US [Member] | Other Financial Derivatives [Member]
Fair value of pension assets
Debt securities	0.0
Non-US [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of pension assets
Debt securities	4.7	4.3
Cash	15.8	16.0
Total plan assets	20.5	20.3
Non-US [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Debt Securities Issued by Non-U.S. Government and Government Agencies [Member]
Fair value of pension assets
Debt securities	4.7	4.3
Non-US [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of pension assets
Debt securities	0.0	0.0
Total plan assets	0.0	0.0
Non-US [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of pension assets
Debt securities	438.7	431.8
Total plan assets	438.7	431.8
Non-US [Member] | Significant Unobservable Inputs (Level 3) [Member] | Insurance Contracts [Member] | Other Asset Backed Securitites [Member]
Fair value of pension assets
Debt securities	$ 438.7	$ 431.8