v3.24.0.1
Employee Benefit Plans - Pretax Amounts for Net Periodic Benefit Cost and Other Amounts Included in Other Comprehensive Income (Loss) for the Defined Benefit Pension and Other Postretirement Benefit Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Pension Benefits [Member] | U.S.Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 0.0    
Interest cost 0.4 $ 0.3 $ 0.3
Recognized actuarial loss 0.0 0.1 0.1
Expected return on plan assets 0.0    
Settlement loss 0.0    
Curtailment gain 0.0    
Net periodic benefit cost 0.4 0.4 0.4
Changes in plan assets and benefit obligations included in other comprehensive income (loss):      
Change in unrecognized net actuarial loss (gain) 0.4 (2.7) (0.6)
Change in unrecognized prior service cost 0.0    
Curtailment and settlements 0.0    
Total included in other comprehensive income (loss) 0.4 (2.7) (0.6)
Total recognized in net periodic benefit cost and included in other comprehensive income (loss) 0.8 (2.3) (0.2)
Pension Benefits [Member] | Non-U.S.Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 5.6 5.7 6.8
Interest cost 7.9 3.7 3.1
Recognized actuarial loss 0.6 0.1 1.6
Expected return on plan assets (7.2) (4.9) (6.4)
Settlement loss 0.9 1.6 0.3
Curtailment gain (0.1) 0.0 (2.5)
Net periodic benefit cost 7.7 6.2 2.9
Changes in plan assets and benefit obligations included in other comprehensive income (loss):      
Change in unrecognized net actuarial loss (gain) 1.3 2.9 (28.0)
Change in unrecognized prior service cost (0.5) (0.1) (0.4)
Curtailment and settlements   0.0 (1.8)
Total included in other comprehensive income (loss) 0.8 2.8 (30.2)
Total recognized in net periodic benefit cost and included in other comprehensive income (loss) $ 8.5 $ 9.0 $ (27.3)