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Derivatives - Statement of Income Location and Impact of Cash Flow (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Cost of sales |  |  |  |
Derivatives in Fair Value Hedging Relationships |  |  |  |
Total amounts of income and expense line items presented in the consolidated statement of income in which the effects of cash flow or fair value hedges are recorded | $ 4,719 | $ 3,805 | $ 9,244 | $ 7,914
Other expense (income), net |  |  |  |
Derivatives in Fair Value Hedging Relationships |  |  |  |
Total amounts of income and expense line items presented in the consolidated statement of income in which the effects of cash flow or fair value hedges are recorded | 33 | 90 | 82 | 165
Cash flow hedge |  |  |  |
Gain or (loss) on cash flow hedging relationships: |  |  |  |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | (12) | 31 | (21) | 47
Cash flow hedge | Foreign currency exchange contracts | Cost of sales |  |  |  |
Gain or (loss) on cash flow hedging relationships: |  |  |  |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | (10) | 33 | (17) | 51
Cash flow hedge | Interest rate contracts | Other expense (income), net |  |  |  |
Gain or (loss) on cash flow hedging relationships: |  |  |  |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | (2) | (2) | $ (4) | $ (4)
Fair value hedges | Interest rate contracts | Other expense (income), net |  |  |  |
Gain or (loss) on fair value hedging relationships: |  |  |  |
Hedged items | (2) | 2 |  |
Fair value hedges | Derivatives designated as hedging instruments | Interest rate contracts | Other expense (income), net |  |  |  |
Gain or (loss) on fair value hedging relationships: |  |  |  |
Derivatives designated as hedging instruments | $ 2 | $ (2) |  |

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