v2.4.1.9
Fair Value Measurements - Recurring (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Cumulative gain (loss) adjustment for non performance risk $ 8gecc_CumulativeGainLossAdjustmentForNonPerformanceRisk $ (7)gecc_CumulativeGainLossAdjustmentForNonPerformanceRisk
Fair Value, Measurements, Recurring    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value of debt securities transferred between level 1 and level 2   2us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount
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Cumulative gain (loss) adjustment for non performance risk 8gecc_CumulativeGainLossAdjustmentForNonPerformanceRisk
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
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