Loans and Card Member Receivables - TDR (Details 6) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Impaired loans and receivables
Loans over 90 days past due and accruing interest		$ 309
Non-accrual loans		191
Account classified as a TDR in program		1,733
Account classified as a TDR out of program		2,068
Total impaired loans and receivables		4,301
Reserve for Credit Losses - TDRs		504
Accounts Receivable and Loans Textuals
Account classified as TDR, past due 90 days and still accruing		48
Accounts classified as TDR, non-accrual		17
Out of Program TDR accounts that completed modification programs		1,922
Out of Program TDR accounts not in compliance with modification programs		146
Card Member Loans | Consumer
Impaired loans and receivables
Loans over 90 days past due and accruing interest	$ 354	252
Non-accrual loans	187	155
Account classified as a TDR in program		781
Account classified as a TDR out of program		1,098
Total impaired loans and receivables		2,286
Reserve for Credit Losses - TDRs		335
Card Member Loans | Small Business
Impaired loans and receivables
Loans over 90 days past due and accruing interest	86	54
Non-accrual loans	52	34
Account classified as a TDR in program		267
Account classified as a TDR out of program		380
Total impaired loans and receivables		735
Reserve for Credit Losses - TDRs		108
Card Member Loans | Corporate
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Account classified as a TDR in program		0
Account classified as a TDR out of program		0
Total impaired loans and receivables		0
Reserve for Credit Losses - TDRs		0
Card Member Receivables | Consumer
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Account classified as a TDR in program		257
Account classified as a TDR out of program		179
Total impaired loans and receivables		436
Reserve for Credit Losses - TDRs		20
Card Member Receivables | Small Business
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	0	0
Account classified as a TDR in program		403
Account classified as a TDR out of program		402
Total impaired loans and receivables		805
Reserve for Credit Losses - TDRs		40
Card Member Receivables | Corporate
Impaired loans and receivables
Loans over 90 days past due and accruing interest	0	0
Non-accrual loans	$ 0	0
Account classified as a TDR in program		6
Account classified as a TDR out of program		7
Total impaired loans and receivables		13
Reserve for Credit Losses - TDRs		1
Other Loans
Impaired loans and receivables
Loans over 90 days past due and accruing interest		3
Non-accrual loans		2
Account classified as a TDR in program		19
Account classified as a TDR out of program		2
Total impaired loans and receivables		26
Reserve for Credit Losses - TDRs		$ 0