ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 18,706,000,000
Balance at end of period	18,366,000,000	$ 18,060,000,000
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(2,566,000,000)	(2,709,000,000)
Other comprehensive income (loss) before reclassifications	(148,000,000)	21,000,000
Amounts reclassified from accumulated other comprehensive income	(7,000,000)	(7,000,000)
Net current period other comprehensive income (loss)	(155,000,000)	14,000,000
Balance at end of period	(2,721,000,000)	(2,695,000,000)
Pension and Other Postretirement Benefits Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(675,000,000)	(761,000,000)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	(40,000,000)	(39,000,000)
Net current period other comprehensive income (loss)	(40,000,000)	(39,000,000)
Balance at end of period	(715,000,000)	(800,000,000)
Changes in Fair Value of Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	44,000,000	33,000,000
Other comprehensive income (loss) before reclassifications	104,000,000	48,000,000
Amounts reclassified from accumulated other comprehensive income	(22,000,000)	(39,000,000)
Net current period other comprehensive income (loss)	82,000,000	9,000,000
Balance at end of period	126,000,000	42,000,000
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(3,197,000,000)	(3,437,000,000)
Other comprehensive income (loss) before reclassifications	(44,000,000)	69,000,000
Amounts reclassified from accumulated other comprehensive income	(69,000,000)	(85,000,000)
Net current period other comprehensive income (loss)	(113,000,000)	(16,000,000)
Balance at end of period	$ (3,310,000,000)	$ (3,453,000,000)