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