ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 17,790,000,000
Balance at end of period	18,114,000,000	$ 18,313,000,000
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	250,000,000	(227,000,000)
Amounts reclassified from accumulated other comprehensive income	0	(10,000,000)
Net current period other comprehensive income (loss)	250,000,000	(237,000,000)
Balance at end of period	(2,530,000,000)	(2,803,000,000)
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	(65,000,000)	(60,000,000)
Net current period other comprehensive income (loss)	(65,000,000)	(60,000,000)
Balance at end of period	(666,000,000)	(735,000,000)
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	16,000,000	50,000,000
Amounts reclassified from accumulated other comprehensive income	(14,000,000)	8,000,000
Net current period other comprehensive income (loss)	2,000,000	58,000,000
Balance at end of period	2,000,000	102,000,000
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	263,000,000	(177,000,000)
Amounts reclassified from accumulated other comprehensive income	(79,000,000)	(62,000,000)
Net current period other comprehensive income (loss)	184,000,000	(239,000,000)
Balance at end of period	$ (3,193,000,000)	$ (3,436,000,000)