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Pension and Post-Employment Benefits - Fair Value of Pension Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair value of pension assets |  |
Total plan assets | $ 48.1 | $ 159.8
Non-US [Member] |  |
Fair value of pension assets |  |
Debt securities | 436.1 | 733.7
Cash | 16.0 | 105.2
Total plan assets | 452.1 | 838.9
Non-US [Member] | Debt Securities Issued by Non-U.S. Government and Government Agencies [Member] |  |
Fair value of pension assets |  |
Debt securities | 4.3 | 80.3
Non-US [Member] | Corporate Debt Securities [Member] |  |
Fair value of pension assets |  |
Debt securities | 0.0 | 445.7
Non-US [Member] | Real Estate [Member] |  |
Fair value of pension assets |  |
Debt securities |  | 47.0
Non-US [Member] | Insurance Contracts [Member] |  |
Fair value of pension assets |  |
Debt securities | 431.8 | 162.2
Non-US [Member] | Other Financial Derivatives [Member] |  |
Fair value of pension assets |  |
Debt securities | 0.0 | (1.5)
Non-US [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair value of pension assets |  |
Debt securities | 4.3 | 127.3
Cash | 16.0 | 105.2
Total plan assets | 20.3 | 232.5
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 | 4.3 | 80.3
Non-US [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate [Member] |  |
Fair value of pension assets |  |
Debt securities |  | 47.0
Non-US [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair value of pension assets |  |
Debt securities | 0.0 | 444.2
Total plan assets | 0.0 | 444.2
Non-US [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] |  |
Fair value of pension assets |  |
Debt securities |  | 445.7
Non-US [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Financial Derivatives [Member] |  |
Fair value of pension assets |  |
Debt securities |  | (1.5)
Non-US [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Fair value of pension assets |  |
Debt securities | 431.8 | 162.2
Total plan assets | 431.8 | 162.2
Non-US [Member] | Significant Unobservable Inputs (Level 3) [Member] | Insurance Contracts [Member] | Other Asset Backed Securitites [Member] |  |
Fair value of pension assets |  |
Debt securities | $ 431.8 | $ 162.2

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