OTHER COMPREHENSIVE INCOME Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period			$ (4,342)
Amounts reclassified from accumulated other comprehensive income	$ 173	$ 48	210	$ 105
Balance at end of period	(4,094)	(5,149)	(4,094)	(5,149)
Defined Benefit Pension and Postretirement Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(1,846)	(2,231)	(1,880)	(2,277)
Amounts reclassified from accumulated other comprehensive income	37	39	71	85
Balance at end of period	(1,809)	(2,192)	(1,809)	(2,192)
Change in Cumulative Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(2,599)	(3,008)	(2,457)	(2,465)
Other comprehensive income (loss) before reclassifications	172	57	29	(487)
Amounts reclassified from accumulated other comprehensive income	140	0	140	0
Other comprehensive income (loss) attributable to noncontrolling interest	1	1	2	2
Balance at end of period	(2,286)	(2,950)	(2,286)	(2,950)
Net Gains and Losses on Cash Flow Hedging Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(8)	(16)	(5)	3
Other comprehensive income (loss) before reclassifications	13	0	7	(30)
Amounts reclassified from accumulated other comprehensive income	(4)	9	(1)	20
Balance at end of period	$ 1	$ (7)	$ 1	$ (7)