Basis of Presentation (Details Textuals) - USD ($) $ in Millions				1 Months Ended	3 Months Ended
		Feb. 01, 2020	Jan. 07, 2020	Mar. 31, 2020	Mar. 31, 2020	Apr. 20, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Ratio of combined earnings and fixed earnings to fixed charges required to maintain availability of credit line					1.25
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease in Card Member receivable reserves				$ (69)	$ (69)			$ (162)
Increase in retained earnings				3,654	3,654			3,513
Sale of Card Member receivables	[1]				5,196
Removal of Card member receivables (U.S. consumer Card Member receivables)		$ 7,200
Reduction in long term debt to affiliate		7,200
Loans to affiliates and other				4,600
Subsequent Event [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of Card Member receivables						$ 1,700
Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease in Card Member receivable reserves				(69)	(69)			(15)	$ (175)	$ (167)
Adoption of new accounting guidance, tax							$ 21
Increase in retained earnings							119
Card Member Loans [Member] | Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in Card Member loan reserves							7
Card Member Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease in Card Member receivable reserves				$ (69)	$ (69)			$ (162)
Card Member Receivables [Member] | Global Corporate Payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of Card Member receivables			$ 5,200
Transfer of Card Member receivables		$ 5,200
Card Member Receivables [Member] | Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease in Card Member receivable reserves							$ 147

[1] During the quarter, TRS removed U.S Consumer and Small Business Card Member receivables from the American Express Issuance Trust II (the Charge Trust) and substantially replaced them with U.S Corporate Card Member receivables. To effect this change, on January 7, 2020, Credco sold $5.2 billion of U.S. Corporate Card Member receivables to TRS. Settlement of this transaction was undertaken through borrowings from American Express Company.