Derivative and Other Financial Instruments - Fair Value Hedges and Contracts Not Designated as Hedges (Details) - Derivatives not designated as hedges - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	$ 14	$ (11)	$ 8	$ (18)
Net sales | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	(3)	0	(3)	(1)
Cost of products sold | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	3	(2)	2	(1)
Cost of products sold | Commodities
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	0	9	0	2
Foreign exchange | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	$ (14)	$ 18	$ (9)	$ 18