ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 17,790,000,000
Balance at end of period	18,202,000,000	$ 18,366,000,000
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(2,780,000,000)	(2,566,000,000)
Other comprehensive income (loss) before reclassifications	345,000,000	(148,000,000)
Amounts reclassified from accumulated other comprehensive income	(3,000,000)	(7,000,000)
Net current period other comprehensive income (loss)	342,000,000	(155,000,000)
Balance at end of period	(2,438,000,000)	(2,721,000,000)
Pension and Other Postretirement Benefits Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(601,000,000)	(675,000,000)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	(43,000,000)	(40,000,000)
Net current period other comprehensive income (loss)	(43,000,000)	(40,000,000)
Balance at end of period	(644,000,000)	(715,000,000)
Changes in Fair Value of Available for Sale Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	4,000,000	0
Other comprehensive income (loss) before reclassifications	(3,000,000)	0
Amounts reclassified from accumulated other comprehensive income	0	0
Net current period other comprehensive income (loss)	(3,000,000)	0
Balance at end of period	1,000,000	0
Changes in Fair Value of Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	0	44,000,000
Other comprehensive income (loss) before reclassifications	15,000,000	104,000,000
Amounts reclassified from accumulated other comprehensive income	(9,000,000)	(22,000,000)
Net current period other comprehensive income (loss)	6,000,000	82,000,000
Balance at end of period	6,000,000	126,000,000
Accumulated other comprehensive income (loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(3,377,000,000)	(3,197,000,000)
Other comprehensive income (loss) before reclassifications	357,000,000	(44,000,000)
Amounts reclassified from accumulated other comprehensive income	(55,000,000)	(69,000,000)
Net current period other comprehensive income (loss)	302,000,000	(113,000,000)
Balance at end of period	$ (3,075,000,000)	$ (3,310,000,000)