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Accumulated Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
After-tax cumulative translation adjustment losses included in accumulated comprehensive income (loss) | $ 1,500 | $ 1,600 | $ 1,500 | $ 1,600 |
After-tax unrecognized pension and other postretirement benefits costs included in accumulated comprehensive income (loss) | 235 | 267 | 235 | 267 |
Net Investment Hedging | Euro Notes |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Other comprehensive gain (loss) foreign currency transaction and translation adjustment, before tax | 55 | $ (411) | 137 | $ (607) |
Net Investment Hedging | Senior Notes |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Long-term debt | $ 4,800 |  | $ 4,800 |  | $ 5,000

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