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v3.22.1

Basis of Presentation (Details) | 3 Months Ended
--- | ---
Mar. 31, 2022
Minimum |
Schedule Of Revenue Sources [Line Items] |
Contract terms with large merchants | 3 years
Maximum |
Schedule Of Revenue Sources [Line Items] |
Contract terms with large merchants | 7 years

X
- Definition Contract with Customer, Contract Term + References No definition available. + Details
Name: | axp_ContractWithCustomerContractTerm
Namespace Prefix: | axp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Revenue Sources [Line Items] + References No definition available. + Details
Name: | axp_ScheduleOfRevenueSourcesLineItems
Namespace Prefix: | axp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |