XML 112 R94.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Customer Deposits (Details 3) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Time Deposits 250000 Or More [Line Items] |  |
Time Deposits, $100,000 or More | $ 125 | $ 124
United States [Member] |  |
Time Deposits 250000 Or More [Line Items] |  |
Time Deposits, $100,000 or More | 114 | 117
Non Us [Member] |  |
Time Deposits 250000 Or More [Line Items] |  |
Time Deposits, $100,000 or More | $ 11 | $ 7

X
- Definition Certificates of deposit in denominations of $250,000 or more, in the aggregate + References No definition available. + Details
Name: | axp_TimeDeposits250000OrMoreLineItems
Namespace Prefix: | axp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
Name: | us-gaap_TimeDeposits100000OrMore
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementGeographicalAxis=axp_UnitedStatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_NonUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |