ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) 2 (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	$ (3,437,000,000)	$ (2,235,000,000)
Other comprehensive income (loss) before reclassifications	408,000,000	(1,165,000,000)
Amounts reclassified from accumulated other comprehensive income	(168,000,000)	(41,000,000)
Spin-off		4,000,000
Net current period other comprehensive income (loss)	240,000,000	(1,202,000,000)	$ 479,000,000
Balance end of period	(3,197,000,000)	(3,437,000,000)	(2,235,000,000)
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	(2,709,000,000)	(1,981,000,000)
Other comprehensive income (loss) before reclassifications	156,000,000	(685,000,000)
Amounts reclassified from accumulated other comprehensive income	(13,000,000)	0
Spin-off		(43,000,000)
Net current period other comprehensive income (loss)	143,000,000	(728,000,000)
Balance end of period	(2,566,000,000)	(2,709,000,000)	(1,981,000,000)
Pension and Other Postretirement Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	(761,000,000)	(202,000,000)
Other comprehensive income (loss) before reclassifications	149,000,000	(569,000,000)
Amounts reclassified from accumulated other comprehensive income	(63,000,000)	(37,000,000)
Spin-off		47,000,000
Net current period other comprehensive income (loss)	86,000,000	(559,000,000)
Balance end of period	(675,000,000)	(761,000,000)	(202,000,000)
Changes in Fair Value of Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period December 31	33,000,000	(52,000,000)
Other comprehensive income (loss) before reclassifications	103,000,000	89,000,000
Amounts reclassified from accumulated other comprehensive income	(92,000,000)	(4,000,000)
Spin-off		0
Net current period other comprehensive income (loss)	11,000,000	85,000,000
Balance end of period	$ 44,000,000	$ 33,000,000	$ (52,000,000)

Amount after tax of reclassification adjustments of other comprehensive income (loss) related to spinoff transaction.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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