Name:	aexc_Cummulativefairvaluehedgingadjustmentofhedgediteminfairvaluehedge
Namespace Prefix:	aexc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Derivatives and Hedging Activities.

No definition available.

Name:	aexc_DerivativesAndHedgingActivitiesTextualsAbstract
Namespace Prefix:	aexc_
Data Type:	xbrli:stringItemType
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Period Type:	duration

Amount posted as initial margin for centrally cleared interest rate swaps which is not netted against the derivative balances

No definition available.

Name:	aexc_Marginoninterestrateswapnotnetted
Namespace Prefix:	aexc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of a net (increase) reduction to interest expense, primarily related to the net settlements on the Company's fair value hedges.

No definition available.

Name:	aexc_Netincreasereductiontointerestexpenserelatedtonetsettlementsonfairvaluehedges
Namespace Prefix:	aexc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

No definition available.

Name:	us-gaap_DerivativeAmountOfHedgedItem
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount, after tax, of reclassification from other comprehensive income (loss) to earnings from the sale or complete or substantially complete liquidation of an investment in a foreign entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (d)(c)
-URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900

Name:	us-gaap_DerivativesUsedInNetInvestmentHedgeGainLossReclassifiedToEarningsNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of increase (decrease) in the cumulative translation adjustment from gain (loss), after tax, on foreign currency derivatives, that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (b),(c),(d)
-URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900