XML 74 R62.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Customer Deposits (Details Textuals) | Sep. 30, 2017 M
--- | ---
Customer Deposits Textuals [Abstract] |
Weighted Average Rate Domestic Deposit Certificates Of Deposit | 2.10%
Weighted Average Maturity Certificates of Deposits | 44

X
- References No definition available. + Details
Name: | axp_Customerdepositstextualsabstract
Namespace Prefix: | axp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remainiing maturity on the portfolio of U.S. retail certificates of deposit + References No definition available. + Details
Name: | axp_WeightedAverageMaturityCertificatesOfDeposits
Namespace Prefix: | axp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average interest rate for domestic certificates of deposit liabilities. + References No definition available. + Details
Name: | us-gaap_WeightedAverageRateDomesticDepositCertificatesOfDeposit
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant