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Regulatory Matters and Capital Adequacy (Details Textuals) $ in Billions	12 Months Ended
	Dec. 31, 2016 USD ($)
Regulatory Matters And Capital Adequacy [Abstract]
Restricted net assets of subsidiaries	$ 7.8
Retained Earnings Available For Payment Of Dividends	6.0
American Express Centurion Bank [Member]
Regulatory Matters And Capital Adequacy [Abstract]
Dividends paid from retained earnings to its parent company	1.6
American Express Bank, FSB [Member]
Regulatory Matters And Capital Adequacy [Abstract]
Dividends paid from retained earnings to its parent company	$ 3.2

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- Definition

Regulatory matters and capital adequacy.

+ References

No definition available.

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Represents the portion of the Banks' retained earnings, in the aggregate, available for the payment of dividends to its parent.

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Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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This element represents disclosure of the total aggregate cash dividends paid to the entity by consolidated subsidiaries, by unconsolidated subsidiaries, and by 50% or less owned persons accounted for using the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(b))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 2
-Subparagraph (SX 210.9-06)
-URI http://asc.fasb.org/extlink&oid=6882215&loc=d3e537971-122884

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