Pension And Other Retirement Benefits - Estimated Future Benefits Payments for Retirement Plans (Detail) - U.S. Plans $ in Millions	Dec. 31, 2025 USD ($)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
2026	$ 33
2027	35
2028	38
2029	39
2030	39
2031 - 2035	182
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
2026	2
2027	2
2028	3
2029	3
2030	3
2031 - 2035	$ 20

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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