Financial Instruments, Hedging Activities and Fair Value Measurements (Cash Flow and Net Investment Hedges) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Fair Value Hedging | Interest rate swaps | Interest expense
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized Amount	$ 8	$ 2
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Gain (Loss) Deferred in OCI	0	(4)
Gain (Loss) Recognized Amount	35	50
Cash Flow Hedging | Foreign currency forward contracts | Other charges and Cost of sales
Derivatives, Fair Value [Line Items]
Gain (Loss) Deferred in OCI	0	(4)
Gain (Loss) Recognized Amount	0	4
Net Investment Hedging
Derivatives, Fair Value [Line Items]
Gain (Loss) Deferred in OCI	115	164
Gain (Loss) Recognized Amount	13	12
Net Investment Hedging | Cross currency swaps
Derivatives, Fair Value [Line Items]
Gain (Loss) Deferred in OCI	14	34
Gain (Loss) Recognized Amount	13	12
Net Investment Hedging | Foreign denominated debt
Derivatives, Fair Value [Line Items]
Gain (Loss) Deferred in OCI	101	130
Not Designated as Hedging Instrument | Foreign currency forward contracts | Other charges and Cost of sales
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized Amount	$ 27	$ 44