Supplemental Equity and Comprehensive Income Information - Reclass AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Amount Reclassified from Accumulated Other Comprehensive Income
Net of tax	$ (101)	$ (206)	$ (208)	$ (284)
Venezuela
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary		162		162
Cumulative Translation Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax		(142)		(142)
Net of tax		(142)		(142)
Cumulative Translation Adjustment | Venezuela
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary		(142)		(142)
Defined Pension and Postretirement Plans Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Transition asset			(1)
Prior service benefit	16	16	31	32
Net actuarial loss	(177)	(119)	(354)	(239)
Curtailments/Settlements	(1)		(2)
Total before tax	(162)	(105)	(326)	(209)
Tax effect	37	25	82	45
Net of tax	(125)	(80)	(244)	(164)
Defined Pension and Postretirement Plans Adjustment | Venezuela
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary		(2)		(2)
Cash Flow Hedging Instruments, Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	31	20	47	27
Tax effect	(7)	(4)	(11)	(5)
Net of tax	24	16	36	22
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Foreign currency forward/option contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	33	21	51	28
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Interest rate contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense	$ (2)	$ (1)	$ (4)	$ (1)