ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 18,358,000,000
Other comprehensive income (loss) before reclassifications	69,000,000	$ 14,000,000
Amounts reclassified from accumulated other comprehensive income	(85,000,000)	(1,000,000)
Net current period other comprehensive income (loss)	(16,000,000)	13,000,000
Balance at end of period	18,060,000,000	17,000,000,000
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(2,709,000,000)	(1,981,000,000)
Other comprehensive income (loss) before reclassifications	21,000,000	12,000,000
Amounts reclassified from accumulated other comprehensive income	(7,000,000)	0
Net current period other comprehensive income (loss)	14,000,000	12,000,000
Balance at end of period	(2,695,000,000)	(1,969,000,000)
Pension and Other Postretirement Benefits Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(761,000,000)	(202,000,000)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	(39,000,000)	(32,000,000)
Net current period other comprehensive income (loss)	(39,000,000)	(32,000,000)
Balance at end of period	(800,000,000)	(234,000,000)
Changes in Fair Value of Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	33,000,000	(52,000,000)
Other comprehensive income (loss) before reclassifications	48,000,000	2,000,000
Amounts reclassified from accumulated other comprehensive income	(39,000,000)	31,000,000
Net current period other comprehensive income (loss)	9,000,000	33,000,000
Balance at end of period	42,000,000	(19,000,000)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(3,437,000,000)	(2,235,000,000)
Balance at end of period	$ (3,453,000,000)	$ (2,222,000,000)