LOANS AND INTEREST RECEIVABLE - Schedule of Delinquency Status of the Principal Amount of Loans and Interest Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Consumer Receivables
Financing Receivable, Past Due [Line Items]
Revolving Loans Amortized Cost Basis	$ 1,847	$ 1,613
Loans, advances, and interest and fees receivable, originated current fiscal year	1,996	547
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	4	9
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 3,847	$ 2,169
Loans, advances, and interest and fees receivable, percentage	100.00%	100.00%
Consumer Receivables | Other Consumer Credit Products
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable	$ 44	$ 56
Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	1,144	931
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	164	427
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	132	24
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	6	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 1,446	$ 1,382
Loans, advances, and interest and fees receivable, percentage	100.00%	100.00%
Current | Consumer Receivables
Financing Receivable, Past Due [Line Items]
Revolving Loans Amortized Cost Basis	$ 1,790	$ 1,573
Loans, advances, and interest and fees receivable, originated current fiscal year	1,939	542
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	3	9
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 3,732	$ 2,124
Loans, advances, and interest and fees receivable, percentage	97.00%	97.90%
Current | Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	$ 1,100	$ 786
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	129	250
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	95	6
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	3	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 1,327	$ 1,042
Loans, advances, and interest and fees receivable, percentage	91.80%	75.40%
30 - 59 Days | Consumer Receivables
Financing Receivable, Past Due [Line Items]
Revolving Loans Amortized Cost Basis	$ 18	$ 12
Loans, advances, and interest and fees receivable, originated current fiscal year	16	3
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 34	$ 15
Loans, advances, and interest and fees receivable, percentage	0.90%	0.70%
30 - 59 Days | Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	$ 24	$ 55
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	12	47
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	12	3
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	1	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 49	$ 105
Loans, advances, and interest and fees receivable, percentage	3.40%	7.60%
60 - 89 Days | Consumer Receivables
Financing Receivable, Past Due [Line Items]
Revolving Loans Amortized Cost Basis	$ 12	$ 10
Loans, advances, and interest and fees receivable, originated current fiscal year	13	1
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 25	$ 11
Loans, advances, and interest and fees receivable, percentage	0.60%	0.50%
60 - 89 Days | Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	$ 10	$ 27
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	8	32
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	7	3
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 25	$ 62
Loans, advances, and interest and fees receivable, percentage	1.70%	4.50%
90 - 179 Days | Consumer Receivables
Financing Receivable, Past Due [Line Items]
Revolving Loans Amortized Cost Basis	$ 27	$ 18
Loans, advances, and interest and fees receivable, originated current fiscal year	28	1
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	1	0
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	0	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 56	$ 19
Loans, advances, and interest and fees receivable, percentage	1.50%	0.90%
90 - 179 Days | Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	$ 10	$ 57
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	11	78
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	11	7
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	1	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 33	$ 142
Loans, advances, and interest and fees receivable, percentage	2.30%	10.30%
180+ Days | Merchant Receivables
Financing Receivable, Past Due [Line Items]
Loans, advances, and interest and fees receivable, originated current fiscal year	$ 0	$ 6
Loans, advances, and interest and fees receivable, originated fiscal year before current fiscal year	4	20
Loans, advances, and interest and fees receivable, originated two years before current fiscal year	7	5
Loans, advances, and interest and fees receivable, originated three years before current fiscal year	1	0
Loans, advances, and interest and fees receivable, originated four years before current fiscal year	0	0
Loans, advances, and interest and fees receivable	$ 12	$ 31
Loans, advances, and interest and fees receivable, percentage	0.80%	2.20%