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Accumulated Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Cumulative translation adjustment losses, net of tax | $ 1,600 | $ 1,500 | $ 1,600 | $ 1,500 |
Unrecognized pension and other postretirement benefits costs, net of tax | 267 | 322 | 267 | 322 |
Net Investment Hedging | Euro Notes |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Other comprehensive gain (loss) foreign currency transaction and translation adjustment, before tax | 23 | $ (204) | (584) | $ (65) |
Net Investment Hedging | Senior Notes |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Long-term debt | $ 5,000 |  | $ 5,000 |  | $ 4,400

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