CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Adjustment for Long-term Intercompany Transactions, Net of Tax	$ 43	$ 9	$ 0
Accumulated other comprehensive loss	(376)	(412)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	438	232	1,182
Net Transfers From (To) Parent			(1,328)
Other comprehensive income (loss), net of tax	36	(44)	78
Balance at end of year	455	438	232	$ 1,182
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	(412)	(371)	(711)
Other comprehensive income (loss), net of tax	36	(41)	74
Balance at end of year	(376)	(412)	(371)	(711)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	(165)	(85)	(419)
Net Transfers From (To) Parent	0	0	266
Other comprehensive income (loss), net of tax	(10)	(80)	68
Balance at end of year		(165)	(85)	(419)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	20	(2)	0	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
OCI, before Reclassifications, Net of Tax, Attributable to Parent	28	0	0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(6)	(2)	0
Former Parent’s Net Investment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	0	0	1,737
Net Transfers From (To) Parent			(1,328)
Balance at end of year		0	0	1,737
Pension and postretirement plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	(245)	(286)	(292)
Other comprehensive income before reclassifications (net tax effect of $2, $5 and $8)	6	22	(15)
Reclassification to income (net tax effect of $4, $5 and $5)	18	19	21
Balance at end of year	(221)	(245)	(286)	(292)
Other comprehensive income (loss) before reclassification, tax		10	29	4
Reclassification from AOCI, tax		5	1	$ 2
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Gain (Loss) on Derivative Used in Net Investment Hedge, after Tax	$ 7	$ 3	$ 0