Loans and Card Member Receivables (Details 3) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Impaired loans and receivables
Loans over 90 days past due and accruing interest	$ 201	$ 169
Non-accrual loans	108	96
Loans and receivables modified as a Troubled Debt Restructuring in Program	1,266	1,332
Loans and receivables modified as Troubled Debt Restructuring Out of Program	1,954	1,764
Total impaired loans and receivables	3,529	3,361
Reserve for Credit Losses - TDRs	404	596
Accounts Receivable and Loans Textuals
Total loans and receivables modified as a TDR, past due 90 days and still accruing	43	41
Total loans and receivables modified as a TDR, non-accrual	14	19
Out of Program TDR accounts that completed modification programs	1,800	1,600
Out of Program TDR accounts not in compliance with modification programs	141	143
Other Loans
Impaired loans and receivables
Loans over 90 days past due and accruing interest	2	1
Non-accrual loans	1	0
Loans and receivables modified as a Troubled Debt Restructuring in Program	34	67
Loans and receivables modified as Troubled Debt Restructuring Out of Program	2	2
Total impaired loans and receivables	39	70
Reserve for Credit Losses - TDRs	1	1
GCSG | Card Member Loans
Impaired loans and receivables
Loans over 90 days past due and accruing interest	171	149
Non-accrual loans	88	82
Loans and receivables modified as a Troubled Debt Restructuring in Program	614	708
Loans and receivables modified as Troubled Debt Restructuring Out of Program	1,036	997
Total impaired loans and receivables	1,909	1,936
Reserve for Credit Losses - TDRs	290	415
GCSG | Card Member Receivables
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Loans and receivables modified as a Troubled Debt Restructuring in Program	154	133
Loans and receivables modified as Troubled Debt Restructuring Out of Program	167	130
Total impaired loans and receivables	321	263
Reserve for Credit Losses - TDRs	8	9
GCS | Card Member Loans
Impaired loans and receivables
Loans over 90 days past due and accruing interest	28	19
Non-accrual loans	19	14
Loans and receivables modified as a Troubled Debt Restructuring in Program	177	176
Loans and receivables modified as Troubled Debt Restructuring Out of Program	361	332
Total impaired loans and receivables	585	541
Reserve for Credit Losses - TDRs	80	132
GCS | Card Member Receivables
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Loans and receivables modified as a Troubled Debt Restructuring in Program	287	248
Loans and receivables modified as Troubled Debt Restructuring Out of Program	388	303
Total impaired loans and receivables	675	551
Reserve for Credit Losses - TDRs	$ 25	$ 39