Loans and Card Member Receivables (Details 1) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 95,437	$ 88,562
Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	56,019	53,645
GCSG | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	74,747	70,467
GCSG | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	21,390	22,392
GCSG | Current | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	74,187	69,960
GCSG | Current | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	21,228	22,279
GCSG | 30 to 59 Days Past Due | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	177	158
GCSG | 30 to 59 Days Past Due | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	61	41
GCSG | 60 to 89 Days Past Due | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	121	112
GCSG | 60 to 89 Days Past Due | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	32	24
GCSG | 90+ Days Past Due | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	262	237
GCSG | 90+ Days Past Due | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	69	48
GCS | Card Member Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	20,690	18,095
GCS | Card Member Loans | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	20,634	18,040
GCS | Card Member Loans | Global Corporate Payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	56	55
GCS | Card Member Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	34,629	31,253
GCS | Card Member Receivables | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	18,968	17,977
GCS | Card Member Receivables | Global Corporate Payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	15,661	13,276
GCS | Current | Card Member Loans | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	20,514	17,950
GCS | Current | Card Member Receivables | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	18,794	17,846
GCS | 30 to 59 Days Past Due | Card Member Loans | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	44	34
GCS | 30 to 59 Days Past Due | Card Member Receivables | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	73	59
GCS | 60 to 89 Days Past Due | Card Member Loans | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	28	19
GCS | 60 to 89 Days Past Due | Card Member Receivables | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	41	28
GCS | 90+ Days Past Due | Card Member Loans | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	48	37
GCS | 90+ Days Past Due | Card Member Loans | Global Corporate Payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	0	0
GCS | 90+ Days Past Due | Card Member Receivables | Global Small Business Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	60	44
GCS | 90+ Days Past Due | Card Member Receivables | Global Corporate Payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 66	$ 42