Hedging Activities (Effect on Consolidated Financial Statements) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Gain/(loss) recognized in other comprehensive income (OCI)	$ 9	$ (35)	$ 32	$ (63)
Gain/(loss) reclassified from accumulated OCI into income ineffective/effective	(4)	(10)	(9)	(14)
Interest Rate Hedges [Member] | Sales [Member]
Gain/(loss) reclassified from accumulated OCI into income ineffective/effective			1	1
Interest Rate Hedges [Member] | Cost of Sales [Member]
Gain/(loss) reclassified from accumulated OCI into income ineffective/effective	(3)	(9)	(9)	(14)
Foreign Exchange Contract [Member]
Gain/(loss) recognized in other comprehensive income (OCI)	9	(35)	32	(63)
Gain/(loss) reclassified from accumulated OCI into income ineffective/effective	$ (1)	$ (1)	$ (1)	$ (1)