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Financial Instruments (Details) € in Millions, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2021 EUR (€) | Dec. 31, 2020 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Notional Amount | $ 11,100 |  |  | $ 11,600
Gain (loss) recorded in Accumulated other comprehensive loss | (46) | $ (403) |  |
(Gain) loss reclassified from Accumulated other comprehensive loss into Product Sales (effective portion) | (14) | 29 |  |
Foreign Currency Cash Flow Hedge Loss to be Reclassified During Next 12 Months | 22 |  |  |
Gain recognized in Other income, net | (8) | $ (39) |  |
Notes 2.150% Due 2030 [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Long-term debt, euro-denominated | € |  |  | € 500 |
Other Current Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivatives designated as hedging instruments, Asset Derivatives | 171 |  |  | 197
Derivatives not designated as hedging instruments, Asset Derivatives | 22 |  |  | 44
Accrued Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivatives designated as hedging instruments, Liability Derivatives | 105 |  |  | 66
Derivatives not designated as hedging instruments, Liability Derivatives | $ 62 |  |  | $ 32

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