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Defined Contribution and Defined Benefit Retirement - Composition of Pension Plan Assets (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 533.9 | $ 548.2 |
Quoted Prices in Active Markets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 155.1 | 204.9 |
Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 9.2 | 10.1 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 320.5 | 314.8 | $ 283.5
Assets measured at NAV |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 49.1 | 18.4 |
Non U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 481.5 | $ 494.8 | $ 450.0
Long-term return on plan assets | 2.40% | 2.00% | 2.90%
Germany |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 282.9 | $ 292.5 |
Germany | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 282.9 | 292.5 |
Canada | Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0.2 | 0.2 |
Canada | Non Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 21.9 | 26.6 |
Canada | Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 89.3 | 87.3 |
Canada | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0.8 | 0.9 |
Canada | Quoted Prices in Active Markets (Level 1) | Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0.2 | 0.2 |
Canada | Quoted Prices in Active Markets (Level 1) | Non Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 21.9 | 26.6 |
Canada | Quoted Prices in Active Markets (Level 1) | Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 89.3 | 87.3 |
Canada | Quoted Prices in Active Markets (Level 1) | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0.8 | 0.9 |
Norway | Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 3.1 | 3.2 |
Norway | Non Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 5.9 | 6.3 |
Norway | Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 25.1 | 26.4 |
Norway | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 7.0 | 5.5 |
Norway | Non Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 6.7 | 7.7 |
Norway | Real Estate. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 9.1 | 7.1 |
Long-term return on plan assets | 4.00% |  |
Norway | Quoted Prices in Active Markets (Level 1) | Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 3.1 | 3.2 |
Norway | Quoted Prices in Active Markets (Level 1) | Non Local Currency Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 5.9 | 6.3 |
Norway | Quoted Prices in Active Markets (Level 1) | Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 15.9 | 16.3 |
Norway | Quoted Prices in Active Markets (Level 1) | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 6.4 | 4.8 |
Norway | Quoted Prices in Active Markets (Level 1) | Non Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 6.7 | 7.7 |
Norway | Significant Other Observable Inputs (Level 2) | Local Currency Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 9.2 | $ 10.1 |
Norway | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of plan asset allocation |  | 17.00% |
Norway | Significant Unobservable Inputs (Level 3) | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0.6 | $ 0.7 |
Norway | Significant Unobservable Inputs (Level 3) | Real Estate. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 9.1 | 7.1 |
Other. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 29.6 | 31.1 |
Other. | Quoted Prices in Active Markets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1.8 | 17.3 |
Other. | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 27.8 | 13.8 |
U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 52.4 | $ 53.3 | $ 48.4
Long-term return on plan assets | 4.00% | 4.50% | 5.50%
U.S. | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 3.2 | $ 5.7 |
U.S. | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 18.5 | 20.9 |
U.S. | Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 30.6 | 26.8 |
U.S. | Multi-asset |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 2.00% |  |
U.S. | Quoted Prices in Active Markets (Level 1) | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 1.9 | 4.4 |
U.S. | Quoted Prices in Active Markets (Level 1) | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1.2 | 3.1 |
U.S. | Quoted Prices in Active Markets (Level 1) | Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets |  | 26.8 |
U.S. | Significant Unobservable Inputs (Level 3) | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 0.1 | 0.7 |
U.S. | Assets measured at NAV |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of plan asset allocation | 94.00% |  |
U.S. | Assets measured at NAV | Cash and Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 1.3 | 1.3 |
U.S. | Assets measured at NAV | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 17.2 | $ 17.1 |
U.S. | Assets measured at NAV | Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 30.6 |  |

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