2.4.0.8400803 - Disclosure - Shareowners' Equity (Parenthetical) (Details)truefalseIn Millions, except Share data, unless otherwise specifiedfalse1falseUSDfalsefalse$FROM_Apr01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000040554duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falseUSDfalsefalse$FROM_Apr01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000040554duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falseUSDfalsefalse$FROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000040554duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$4falseUSDfalsefalse$FROM_Jan01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000040554duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falseUSDfalsefalse$AS_OF_Dec31_2012http://www.sec.gov/CIK0000040554instant2012-12-31T00:00:000001-01-01T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$6falsetruefalseAS_OF_Sep30_2012_gecc_PreferredSharesIssuanceCountAxis_FirstPreferredSharesIssuanceMemberhttp://www.sec.gov/CIK0000040554instant2012-09-30T00:00:000001-01-01T00:00:00falsefalseFirst Preferred Shares Issuance [Member]gecc_PreferredSharesIssuanceCountAxisxbrldihttp://xbrl.org/2006/xbrldigecc_FirstPreferredSharesIssuanceMembergecc_PreferredSharesIssuanceCountAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli07falseUSDtruefalse$FROM_Jan01_2012_TO_Dec31_2012_gecc_PreferredSharesIssuanceCountAxis_SecondPreferredSharesIssuanceMemberhttp://www.sec.gov/CIK0000040554duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseSecond Preferred Shares Issuance [Member]gecc_PreferredSharesIssuanceCountAxisxbrldihttp://xbrl.org/2006/xbrldigecc_SecondPreferredSharesIssuanceMembergecc_PreferredSharesIssuanceCountAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$8falsetruefalseAS_OF_Jun30_2013_gecc_PreferredSharesIssuanceCountAxis_SecondPreferredSharesIssuanceMemberhttp://www.sec.gov/CIK0000040554instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseSecond Preferred Shares Issuance [Member]gecc_PreferredSharesIssuanceCountAxisxbrldihttp://xbrl.org/2006/xbrldigecc_SecondPreferredSharesIssuanceMembergecc_PreferredSharesIssuanceCountAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli01true3us-gaap_MinorityInterestLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false4us-gaap_PreferredStockSharesIssuedus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5000050000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse5000050000falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse4000040000falsefalsefalse6truefalsefalse2250022500falsefalsefalse7truefalsefalse1750017500falsefalsefalse8truefalsefalse1000010000falsefalsefalsexbrli:sharesItemTypesharesTotal number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
false13false4us-gaap_PreferredStockParOrStatedValuePerShareus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse0.010.01USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse0.010.01USD$falsetruefalse4falsefalsefalse00falsefalsefalse5truefalsefalse0.010.01USD$falsetruefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalFace amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 3, 4, 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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