Name:	gecc_CumulativeGainLossAdjustmentForNonPerformanceRisk
Namespace Prefix:	gecc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of excess cash collateralization held for derivatives.

No definition available.

Name:	gecc_ExcessCollateralization
Namespace Prefix:	gecc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The excess amount of cash collateral posted at period end

No definition available.

Name:	gecc_ExcessCollateralPosted
Namespace Prefix:	gecc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of excess securities held as collateral on derivatives

No definition available.

Name:	gecc_ExcessSecuritiesCollateralHeld
Namespace Prefix:	gecc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage Of Notional Amount That Is Associated With Reducing Or Eliminating Interest Rate, Currency, Or Market Risk between Financial Assets and Liabilities in the Financial Services businesses

No definition available.

Name:	gecc_PercentageOfNotionalAmountThatIsAssociatedWithReducingOrEliminatingInterestRateCurrencyOrMarketRisk
Namespace Prefix:	gecc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226000-175313

Name:	us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

Name:	gecc_DerivativeCounterpartyCollateralAxis=gecc_CashCollateralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	gecc_DerivativeCounterpartyCollateralAxis=gecc_NettingAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	gecc_DerivativeCounterpartyCollateralAxis=us-gaap_SecuritiesPledgedAsCollateralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	gecc_InformationByFinancialStatementLineItemsAxis=gecc_AmountsOffsetInStatementOfFinancialPositionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	gecc_InformationByFinancialStatementLineItemsAxis=gecc_RecognizedInStatementOfFinancialPositionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_DerivativesAccountedForAsHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_DerivativesAssociatedWithInterestRateCurrencyOrMarketRiskReductionOrEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_DerivativesNotAccountedForAsHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_GrossAccruedInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_GrossDerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeByNatureAxis=gecc_NetDerivativeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: