Pension And Other Retirement Benefits - Weighted-Average Assumptions Used to Determine Net Periodic Benefit Expense (Detail) - U.S. Plans	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.43%	4.73%	4.93%
Expected return on plan assets	6.60%	6.10%	6.55%
Rate of compensation increase	3.60%	3.60%	3.63%
Cash balance plan interest crediting rate	4.78%	4.50%	4.50%
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.40%	4.75%	4.90%
Expected return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Cash balance plan interest crediting rate	0.00%	0.00%	0.00%