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Retirement Plans, Postretirement and Postemployment Benefits - Schedule of Amounts Recognized on Consolidated Balance Sheet (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Defined Benefit Plan Disclosure [Line Items] |  |
Noncurrent asset pension and postretirement benefits | $ 295.3 | $ 179.2
Current pension and postretirement benefits | (6.8) | (14.8)
Noncurrent pension, postretirement and postemployment benefits | (79.0) | (99.6)
Net amount recognized at end of year | 209.5 | 64.8
Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net amount recognized at end of year | (8.9) | (11.4)
Current pension and postretirement benefits | (1.0) | (1.2)
Noncurrent pension, postretirement and postemployment benefits | (7.9) | (10.2)
Net amount recognized at end of year | $ (8.9) | $ (11.4)

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