CREDIT CARD AND OTHER LOANS - Troubled Debt Restructurings (Details) - Consumer Portfolio	3 Months Ended	6 Months Ended
Jun. 30, 2022 USD ($) item	Jun. 30, 2021 USD ($) item	Jun. 30, 2022 USD ($) item	Jun. 30, 2021 USD ($) item
Troubled debt restructurings - credit card loans
Modifications related to troubled debt restructurings within credit card and loan receivables
Number of Restructurings \| item	32,216	33,061	70,214	96,689
Pre-modification Outstanding Balance	$ 46,000,000	$ 52,000,000	$ 102,000,000	$ 145,000,000
Post-modification Outstanding Balance	$ 46,000,000	$ 52,000,000	$ 102,000,000	$ 145,000,000
Troubled debt restructurings that subsequently defaulted
Modifications related to troubled debt restructurings within credit card and loan receivables
Number of Restructurings	18,037	31,727	39,960	82,736
Post-modification Outstanding Balance	$ 25,000,000	$ 42,000,000	$ 54,000,000	$ 109,000,000

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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