Hedging Activities (Effect on Consolidated Financial Statements) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gain recognized in other comprehensive income (OCI)	$ 11	$ 38	$ (33)
Gain/(loss) reclassified from accumulated OCI into income (effective)	12	(13)	(34)
Sales [Member]
Gain/(loss) reclassified from accumulated OCI into income (effective)		1	4
Interest Rate Hedge [Member]
Gain recognized in other comprehensive income (OCI)	16
Interest Rate Hedge [Member] | Cost of Sales [Member]
Gain/(loss) reclassified from accumulated OCI into income (effective)	13	(12)	(36)
Foreign Exchange Contracts [Member]
Gain recognized in other comprehensive income (OCI)	(5)	38	(33)
Foreign Exchange Contracts [Member] | Other Expense [Member]
Gain/(loss) reclassified from accumulated OCI into income (effective)	$ (1)	$ (2)	$ (2)