Financial Instruments (Details) € in Millions, $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 EUR (€)
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 11,600	$ 13,000
Gain (loss) recorded in Accumulated other comprehensive loss	181	(33)
(Gain) loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	82	51
Long-term debt, euro-denominated \| €			€ 500
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	23
Foreign exchange contracts gain (loss)	(76)	91
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - assets	197	23
Derivatives not designated as hedging instruments - assets	44	23
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - liabilities	66	166
Derivatives not designated as hedging instruments - liabilities	$ 32	$ 116

Long-term debt, euro-denominated

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Nominal or face amount used to calculate payment on derivative.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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No definition available.

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

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The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

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