Supplemental Equity and Comprehensive Income Information - Reclass AOCI (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Amount Reclassified from Accumulated Other Comprehensive Income
Net of tax	$ (111)	$ (59)		$ (319)	$ (343)
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)
Net of tax					(142)
Cumulative Translation Adjustment | Venezuela
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary					(142)
Defined Pension and Postretirement Plans Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Transition asset	(1)			(2)
Prior service benefit	15	18		46	50
Net actuarial loss	(176)	(119)		(530)	(358)
Curtailments/Settlements	(1)			(3)
Total before tax	(163)	(101)		(489)	(310)
Tax effect	36	25		118	70
Net of tax	(127)	(76)		(371)	(240)
Defined Pension and Postretirement Plans Adjustment | Venezuela
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary					(2)
Cash Flow Hedging Instruments, Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	21	21		68	48
Tax effect	(5)	(4)		(16)	(9)
Net of tax	16	17		52	39
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Foreign currency forward/option contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	23	22		74	50
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Interest rate contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense	$ (2)	$ (1)		$ (6)	$ (2)