Asset Securitizations (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Assets from Trusts [Line Items]
Restricted balances included in Cash and cash equivalents	$ 1,360,000,000	$ 525,000,000	$ 475,000,000	$ 606,000,000
American Express Lending Trust
Assets from Trusts [Line Items]
Direct and Indirect ownership of variable interests	14,400,000,000	15,000,000,000
Restricted balances included in Cash and cash equivalents	907,000,000	42,000,000
American Express Charge Trust
Assets from Trusts [Line Items]
Direct and Indirect ownership of variable interests	5,900,000,000	3,200,000,000
Restricted balances included in Cash and cash equivalents	$ 0	$ 1,000,000