Card Member Receivables and Card Member Loans (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Card Member Receivables
Financing Receivable Segment [Abstract]
Financing receivables, gross	$ 12,868		$ 12,157
Less: Reserves for credit losses	(4)	$ 30	70	$ 184	$ 69	$ 15
Financing receivables, net	12,872		12,087
Deferred discount revenue on card member receivable	20		19
Card Member Loans
Financing Receivable Segment [Abstract]
Less: Reserves for credit losses	21	$ 24	20	$ 23	$ 18	$ 17
Financing receivables, net	458		480
Global Consumer Services Group \| Card Member Receivables
Financing Receivable Segment [Abstract]
Financing receivables, gross	2,169		2,157
Global Consumer Services Group \| Card Member Loans
Financing Receivable Segment [Abstract]
Financing receivables, gross	479		500
Less: Reserves for credit losses	21		20
Financing receivables, net	458		480
Global Commercial Services \| Card Member Receivables
Financing Receivable Segment [Abstract]
Financing receivables, gross	$ 10,699		$ 10,000

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Amount, before allowance for credit loss, of financing receivable.

AMERICAN EXPRESS CREDIT CORP 10-Q