Pension and Postretirement Benefit Plans and Defined Contribution Plans - Expected Future Cash Flow Information (Details) $ in Millions	Dec. 31, 2025 USD ($)
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions in 2026	$ 46
Expected benefit payments:
2026	49
2027	55
2028	58
2029	59
2030	60
2031–2035	284
U.S. [Member] \| Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions in 2026	88
Expected benefit payments:
2026	849
2027	844
2028	817
2029	807
2030	782
2031–2035	3,513
International [Member] \| Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions in 2026	168
Expected benefit payments:
2026	410
2027	413
2028	412
2029	427
2030	440
2031–2035	$ 2,324

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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