Pension and Postretirement Plans - Schedule of Future Service Benefit Payments (Details) $ in Millions	Dec. 31, 2025 USD ($)
Pension Benefits \| United States
Defined Benefit Plan Disclosure [Line Items]
2026	$ 225
2027	222
2028	221
2029	224
2030	224
2031-2035	1,201
Pension Benefits \| Int’l.
Defined Benefit Plan Disclosure [Line Items]
2026	21
2027	22
2028	27
2029	29
2030	31
2031-2035	164
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	15
2027	15
2028	15
2029	15
2030	15
2031-2035	$ 65

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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