VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	[1]	$ 6,449		$ 6,449		$ 12,541
Eliminations
Variable Interest Entity [Line Items]
Assets		(6,173)		$ (6,173)		(6,729)
Consolidated VIEs
Variable Interest Entity [Line Items]
Variable interest entities outsourcing agreement initial term				5 years
Assets		112		$ 112		217
Consolidated VIEs | Eliminations
Variable Interest Entity [Line Items]
Liabilities associated with the certain outsourcing agreements and purchase options		129		129		127
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets		182		182		$ 175
Loss from equity method investments		$ (5)	$ 7	$ (25)	$ 12

[1] Our consolidated total assets as of June 30, 2022 and December 31, 2021 include total assets of variable interest entities (VIEs) of $112 million and $217 million, respectively, which can only be used to settle the obligations of the VIEs. Our consolidated total liabilities as of June 30, 2022 and December 31, 2021 include total liabilities of VIEs of $15 million and $62 million, respectively, for which the creditors of the VIEs have no recourse to us. See Note 9. Variable Interest Entities.