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Derivative instruments - Summary of Income and Expense Line Items (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |
Total revenues | $ 28,190 | $ 26,323 | $ 25,979
Other income (expense), net | 2,833 | (814) | 259
Interest expense, net | (2,875) | (1,406) | (1,197)
Cross-currency swap contract gains (losses) | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges |  |  |
Derivative [Line Items] |  |  |
Other income (expense), net | 42 | (233) | (245)
Interest rate swap contracts |  |  |
Derivative [Line Items] |  |  |
Gains (losses) on fair value hedging relationships, Hedged Items | (118) | 716 | 281
Gains (losses) on fair value hedging relationships, Derivatives designated as hedging instruments | 205 | (636) | (192)
Total product sales |  |  |
Derivative [Line Items] |  |  |
Total revenues | 26,910 | 24,801 | 24,297
Total product sales | Foreign currency forward contracts | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges |  |  |
Derivative [Line Items] |  |  |
Total revenues | $ 180 | $ 231 | $ (8)

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480238/815-25-50-1 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480238/815-25-50-1 + Details
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