Asset Securitizations (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Assets from Trusts [Line Items]
Restricted balances included in Cash and cash equivalents	$ 1,086,000,000	$ 525,000,000	$ 1,841,000,000	$ 606,000,000
American Express Lending Trust
Assets from Trusts [Line Items]
Direct and Indirect ownership of variable interests	15,000,000,000	15,000,000,000
Restricted balances included in Cash and cash equivalents	621,000,000	42,000,000
American Express Charge Trust
Assets from Trusts [Line Items]
Direct and Indirect ownership of variable interests	5,800,000,000	3,200,000,000
Restricted balances included in Cash and cash equivalents	$ 0	$ 1,000,000