OTHER COMPREHENSIVE INCOME - Changes In Accumulated Other Comprehensive Income (Loss) (“AOCI”), Net Of Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,284	$ 2,079	$ 2,112	$ 2,517
Net transfers to Parent	(487)	(22)	(479)	(190)
Ending balance	265	2,091	265	2,091
Total Accumulated Other Comprehensive Income (Loss) at End of Period	265	2,091	265	2,091
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,493)	(1,554)	(1,480)	(1,229)
Net transfers to Parent	(30)	0	(30)	0
Ending balance	(1,627)	(1,571)	(1,627)	(1,571)
Total Accumulated Other Comprehensive Income (Loss) at End of Period	(1,627)	(1,571)	(1,627)	(1,571)
Defined Benefit Pension and Postretirement Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(48)	(44)	(48)	(44)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net transfers to Parent	(30)	0	(30)	0
Ending balance	(78)	(44)	(78)	(44)
Total Accumulated Other Comprehensive Income (Loss) at End of Period	(78)	(44)	(78)	(44)
Change in Cumulative Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,448)	(1,503)	(1,433)	(1,187)
Other comprehensive income (loss) before reclassifications	(100)	(22)	(115)	(338)
Ending balance	(1,548)	(1,525)	(1,548)	(1,525)
Total Accumulated Other Comprehensive Income (Loss) at End of Period	(1,548)	(1,525)	(1,548)	(1,525)
Net Gains and Losses on Cash Flow Hedging Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	3	(7)	1	2
Other comprehensive income (loss) before reclassifications	(4)	5	(2)	(4)
Ending balance	(1)	(2)	(1)	(2)
Total Accumulated Other Comprehensive Income (Loss) at End of Period	$ (1)	$ (2)	$ (1)	$ (2)