Loans and Card Member Receivables (Details 1) - Card Member receivables - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 57,613	$ 53,645
Financing receivables, reserves for credit losses	229	64	$ 267	$ 126
Financing receivables, net	57,384	53,581
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	22,885	22,392
Small Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	19,629	17,977
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	15,099	13,276
Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	5,193	5,175
Variable Interest Entity, Primary Beneficiary | Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 5,200	$ 5,200