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Derivative instruments - Schedule of Income and Expense Line Items (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivative [Line Items] |  |  |
Total revenues | $ 33,424 | $ 28,190 | $ 26,323
Other income (expense), net | 506 | 2,833 | (814)
Interest expense, net | (3,155) | (2,875) | (1,406)
Cross-currency swap contract (losses) gains | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges |  |  |
Derivative [Line Items] |  |  |
Other income (expense), net | (75) | 42 | (233)
Interest rate swap contracts |  |  |
Derivative [Line Items] |  |  |
Gains (losses) on fair value hedging relationships, Hedged Items | 29 | (118) | 716
Derivatives designated as hedging instruments | 40 | 205 | (636)
Product sales |  |  |
Derivative [Line Items] |  |  |
Total revenues | 32,026 | 26,910 | 24,801
Product sales | Foreign currency forward contracts | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges |  |  |
Derivative [Line Items] |  |  |
Total revenues | $ 192 | $ 180 | $ 231

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