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Customer Deposits (Details 1) (USD $) In Millions | Jun. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Deposits By Type |  |
Other deposits | $ 711 | $ 674
Total customer deposits | 32,291 | 29,727
United States [Member] |  |
Deposits By Type |  |
Savings accounts - Direct | 12,965 | 7,725
Certificates of deposit - Direct | 926 | 1,052
Certificates of deposit - Third party | 8,640 | 11,411
Sweep accounts - Third party | $ 9,049 | $ 8,865

X
- Definition Represents other types of deposits not previously classified. + Details
Name: | axp_DepositsOther
Namespace Prefix: | axp
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents direct personal savings accounts, primarily high yield savings accounts, offered directly by the Company's Banks. + Details
Name: | axp_DepositsSavingsAccountsDirect
Namespace Prefix: | axp
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents direct certificates of deposit accounts offered directly by the Company's Banks. + Details
Name: | axp_DirectCertificatesOfDeposits
Namespace Prefix: | axp
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents third party certificate of deposit accounts offered by the Company's Banks. + Details
Name: | axp_ThirdPartyCertificatesOfDeposit
Namespace Prefix: | axp
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents third party sweep accounts offered by the Company's Banks. + Details
Name: | axp_ThirdPartySweepAccounts
Namespace Prefix: | axp
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 13 -Paragraph 37, 38, 39 -IssueDate 2006-05-01 + Details
Name: | us-gaap_Deposits
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DepositsByTypeAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration