Supplemental Equity and Comprehensive Income Information - Reclass AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary	$ 162
Net of tax	(438)	$ (538)	$ (366)
Cumulative Translation Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary	(142)
Total before tax	(142)
Net of tax	(142)
Defined Pension and Postretirement Plans Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Deconsolidation of Venezuelan subsidiary	(2)
Prior service benefit	69	76	89
Net actuarial loss	(478)	(678)	(570)
Curtailments/Settlements	(48)	(4)	(6)
Total before tax	(459)	(606)	(487)
Tax effect	110	145	117
Net of tax	(349)	(461)	(370)
Cash Flow Hedging Instruments, Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	70
Tax effect	(17)
Net of tax	53
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Foreign currency forward/option contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	74
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Interest rate swap contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense	$ (4)
Cash Flow Hedging Instruments, Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax		(96)	7
Tax effect		19	(3)
Net of tax		(77)	4
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Foreign currency forward/option contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales		(95)	8
Cash Flow Hedging Instruments, Unrealized Gain (Loss) | Interest rate swap contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense		$ (1)	$ (1)