Loans and Card Member Receivables (Details 1) - Card Member receivables - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 53,645	$ 43,701
Financing receivables, reserves for credit losses	64	267	$ 619	$ 573
Financing receivables, net	53,581	43,434
Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	5,175	4,296
Global Consumer Services Group
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	22,392	18,685
Global Commercial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	31,253	25,016
Global Commercial Services | Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, gross	$ 5,200	$ 4,300