ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) 2 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	$ (3,197,000,000)	$ (3,437,000,000)
Other comprehensive income (loss) before reclassifications	(72,000,000)	408,000,000
Amounts reclassified from accumulated other comprehensive income	(108,000,000)	(168,000,000)
Net current period other comprehensive income (loss)	(180,000,000)	240,000,000
Balance end of period	(3,377,000,000)	(3,197,000,000)
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	(2,566,000,000)	(2,709,000,000)
Other comprehensive income (loss) before reclassifications	(201,000,000)	156,000,000
Amounts reclassified from accumulated other comprehensive income	(13,000,000)	(13,000,000)
Net current period other comprehensive income (loss)	(214,000,000)	143,000,000
Balance end of period	(2,780,000,000)	(2,566,000,000)
Pension and Other Postretirement Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	(675,000,000)	(761,000,000)
Other comprehensive income (loss) before reclassifications	115,000,000	149,000,000
Amounts reclassified from accumulated other comprehensive income	(41,000,000)	(63,000,000)
Net current period other comprehensive income (loss)	74,000,000	86,000,000
Balance end of period	(601,000,000)	(675,000,000)
Changes in Fair Value of Available for Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	0	0
Other comprehensive income (loss) before reclassifications	4,000,000	0
Amounts reclassified from accumulated other comprehensive income	0	0
Net current period other comprehensive income (loss)	4,000,000	0
Balance end of period	4,000,000	0
Changes in Fair Value of Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	44,000,000	33,000,000
Other comprehensive income (loss) before reclassifications	10,000,000	103,000,000
Amounts reclassified from accumulated other comprehensive income	(54,000,000)	(92,000,000)
Net current period other comprehensive income (loss)	(44,000,000)	11,000,000
Balance end of period	$ 0	$ 44,000,000