Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivatives in Cash Flow Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	$ (5)	$ (3)	$ (18)	$ (7)
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1)	(3)	(2)	(9)
Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	(2)	(4)	(12)	(2)
Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Cost of products sold | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1)	(3)	(2)	(13)
Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	(3)	1	(6)	(5)
Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Cost of products sold | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	0	4
Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	0	0	(1)	0
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	$ 0	$ 0	$ (1)	$ 0