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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	$ 8	$ (11)	$ 16	$ (29)
Net sales | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	(4)	0	(7)	(1)
Cost of products sold | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	4	(1)	6	(2)
Cost of products sold | Commodities
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	0	(2)	0	0
Foreign exchange | Foreign exchange
Derivative [Line Items]
Gain (loss) on derivative instruments, net, pretax	$ (8)	$ 8	$ (17)	$ 26