Derivative and Other Financial Instruments - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	$ 3,174	$ 2,468	$ 8,417	$ 6,530
Cost of products sold	2,530	1,972	6,804	5,235
Income Tax Expense (Benefit)	(102)	(79)	(196)	(178)
Net income	193	208	453	489
Designated as Hedging Instrument | Derivatives in cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	(5)	9	(9)	27
Designated as Hedging Instrument | Derivatives in cash flow hedges | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	(3)	(2)	(5)	1
Designated as Hedging Instrument | Derivatives in cash flow hedges | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in AOCI (effective portion)	(2)	11	(4)	26
Reclassification out of Accumulated Other Comprehensive Income | Designated as Hedging Instrument | Derivatives in cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) reclassified from AOCI into earnings, before tax	7	6	24	21
Income Tax Expense (Benefit)	(1)	(1)	(6)	(6)
Net income	6	5	18	15
Reclassification out of Accumulated Other Comprehensive Income | Designated as Hedging Instrument | Derivatives in cash flow hedges | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	(6)	(3)	(7)	(6)
Cost of products sold	5	2	4	5
Reclassification out of Accumulated Other Comprehensive Income | Designated as Hedging Instrument | Derivatives in cash flow hedges | Commodities
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	(1)	0	(6)	0
Cost of products sold	$ 9	$ 7	$ 33	$ 22