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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