Name:	axp_FinancingReceivableModificationToTotalFinancingReceivablesPercent
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Period of increase in average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	axp_FinancingReceivableModifiedAverageTermIncreaseFromModification
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Financing Receivable, Modified, Maximum Term Increase From Modification For Customers On Fixed Payment Plans

No definition available.

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Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

No definition available.

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Data Type:	dtr-types:percentItemType
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_FinancingReceivableModificationsLineItems
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Data Type:	xbrli:stringItemType
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Amount, after troubled debt restructuring, of modified financing receivable.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554

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Data Type:	na
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Data Type:	na
Balance Type:
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Name:	us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=axp_SmallBusinessBorrowerMember
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Data Type:	na
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