Employee Benefits - Employee Benefit Plan Status (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan Assets at Fair Value	$ 1,708.9			$ 1,793.7
Supplemental Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	125.5			139.8
Projected Benefit Obligation	147.7			162.3	$ 149.2
Plan Assets at Fair Value	0.0			0.0
Funded Status at end of year	$ (147.7)			$ (162.3)
Weighted-Average Assumptions:
Discount Rates	2.80%			2.45%
Rate of Increase in Compensation Level	4.97%			4.97%
U.S. Plan | Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 1,246.6			$ 1,312.9
Projected Benefit Obligation	1,401.3			1,470.6	1,323.4
Plan Assets at Fair Value	1,708.9			1,793.7	1,601.2
Funded Status at end of year	$ 307.6			$ 323.1
Weighted-Average Assumptions:
Discount Rates	3.03%	3.06%	3.05%	2.75%
Rate of Increase in Compensation Level	4.97%			4.97%
Expected Long-Term Rate of Return on Assets	5.25%	5.00%	5.25%	5.25%
Non U.S. Plans | Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 204.5			$ 228.5
Projected Benefit Obligation	210.1			236.1	211.1
Plan Assets at Fair Value	198.7			211.5	$ 190.1
Funded Status at end of year	$ (11.4)			$ (24.6)
Weighted-Average Assumptions:
Discount Rates	1.34%			0.93%
Rate of Increase in Compensation Level	1.50%			1.50%
Expected Long-Term Rate of Return on Assets	1.79%			1.28%