Pension And Other Retirement Benefits - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail) - U.S. Plans	Dec. 31, 2025	Dec. 31, 2024
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.24%	5.43%
Rate of compensation increase	3.10%	3.60%
Cash balance plan interest crediting rate	4.71%	4.78%
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.30%	5.40%
Rate of compensation increase	0.00%	0.00%
Cash balance plan interest crediting rate	0.00%	0.00%