Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension and Other Postretirement Benefits Disclosure
Settlement Loss on the U.S. Pension Plan Annuity Purchase	$ (103.8)	$ 0.0	$ 0.0
Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.50%	7.00%
Ultimate Health Care Cost Trend Rate	5.00%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2036
Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 367.2	$ 0.0
Settlement Loss on the U.S. Pension Plan Annuity Purchase	$ (103.8)	0.0	0.0
Average Remaining Life Expectancy of Plan Participants	24 years
Alternative Investments, Unfunded Commitments	$ 14.8	15.2
Pension Plan | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Payment for Settlement	0.0	0.0
Settlement Loss on the U.S. Pension Plan Annuity Purchase	$ 0.0	0.0	0.0
Average Remaining Life Expectancy of Plan Participants	27 years
Alternative Investments, Unfunded Commitments	$ 2.5	7.1
Other Postretirement Benefit Plans
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Payment for Settlement	0.0	0.0
Settlement Loss on the U.S. Pension Plan Annuity Purchase	$ 0.0	0.0	0.0
Average Remaining Life Expectancy of Plan Participants	12 years
Investment Level 3 Transfers Into	$ 0.0	0.0
Investment Level 3 Transfers Out of	$ 0.0	$ 0.0
Interest Rate During Period	4.96%	5.01%
Other Postretirement Benefit Plans | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	5.00%
Employer Discretionary Contribution Percentage of earnings	4.50%
Cost Recognized	$ 83.2	$ 81.6	74.3
Other Postretirement Benefit Plans | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Defined Contribution Plan, Minimum Employee Contribution Eligible for Matching	1.00%
Defined Contribution Plan, Maximum Employee Contribution Eligible for Matching	5.00%
Cost Recognized	$ 7.3	$ 6.6	$ 5.7
Equity Funds | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	38.00%
Fixed Maturity Securities | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30.00%
All Other Asset Categories | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	32.00%
Diversified Growth Assets | Pension Plan | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	43.00%
Alternative Investments | Pension Plan | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20.00%
Liability Driven Investments | Pension Plan | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	37.00%
Minimum | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Private Equity Partnership Future Liquidation Term	5 years
Minimum | Other Postretirement Benefit Plans | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	8.00%
Maximum | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Private Equity Partnership Future Liquidation Term	8 years
Maximum | Other Postretirement Benefit Plans | Foreign Plan
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	12.00%