Supplemental Information About The Credit Quality Of Financing Receivables And Allowance For Losses On Financing Receivables (Impaired Loans) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Impaired Loans
Recorded investment in loans with no specific allowance	$ 209		$ 209	$ 530
Unpaid principal balance with no specific allowance	233		233	580
Average investment with no specific allowance	313			241
Recorded investment in loans with a specific allowance	741		741	2,062
Unpaid principal balance with a specific allowance	645		645	2,112
Allowance for losses (specific reserves)	245		245	424
Average investment with a specific allowance	1,066			2,591
Non-impaired financing receivables	86,254		86,254	123,969
General reserves	3,212		3,212	3,680
Impaired loans	950		950	2,592
Impaired loans classified as Troubled debt restructuring (TDR)	860		860
Discounted Cash Flow Method [Member]
Impaired Loans
Impaired loans	819		819	2,149
Collateral Value Method [Member]
Impaired Loans
Impaired loans	131		131	443
CLL [Member]
Impaired Loans
Recorded investment in loans with no specific allowance	11		11	10
Unpaid principal balance with no specific allowance	11		11	10
Average investment with no specific allowance	11			7
Recorded investment in loans with a specific allowance	5		5	5
Unpaid principal balance with a specific allowance	5		5	5
Allowance for losses (specific reserves)	3		3	4
Average investment with a specific allowance	5			4
Impaired loans classified as Troubled debt restructuring (TDR)	5		5
Energy Financial Services [Member]
Impaired Loans
Recorded investment in loans with no specific allowance	82		82	53
Unpaid principal balance with no specific allowance	100		100	54
Average investment with no specific allowance	54			26
Recorded investment in loans with a specific allowance	0		0	15
Unpaid principal balance with a specific allowance	0		0	15
Allowance for losses (specific reserves)	0		0	12
Average investment with a specific allowance	6			24
Impaired loans classified as Troubled debt restructuring (TDR)	7		7
GECAS
Impaired Loans
Recorded investment in loans with no specific allowance	116		116	329
Unpaid principal balance with no specific allowance	122		122	337
Average investment with no specific allowance	213			88
Recorded investment in loans with a specific allowance	0		0	0
Unpaid principal balance with a specific allowance	0		0	0
Allowance for losses (specific reserves)	0		0	0
Average investment with a specific allowance	0			15
Impaired loans classified as Troubled debt restructuring (TDR)	112		112
Commercial [Member]
Impaired Loans
Recorded investment in loans with no specific allowance	209		209	392
Unpaid principal balance with no specific allowance	233		233	401
Average investment with no specific allowance	278			121
Recorded investment in loans with a specific allowance	5		5	20
Unpaid principal balance with a specific allowance	5		5	20
Allowance for losses (specific reserves)	3		3	16
Average investment with a specific allowance	11			44
Average investment in loans	289			165
Interest income recognized	0	$ 0		0
Interest income recognized on a cash basis	0	0		0
Non-impaired financing receivables	23,470		23,470	25,329
General reserves	82		82	77
Impaired loans	214		214	412
Consumer [Member]
Impaired Loans
Recorded investment in loans with no specific allowance	0		0	138
Unpaid principal balance with no specific allowance	0		0	179
Average investment with no specific allowance	35			120
Recorded investment in loans with a specific allowance	736		736	2,042
Unpaid principal balance with a specific allowance	640		640	2,092
Allowance for losses (specific reserves)	242		242	408
Average investment with a specific allowance	1,055			2,547
Average investment in loans	1,090			2,667
Interest income recognized	48	135		126
Interest income recognized on a cash basis	1	3		5
Non-impaired financing receivables	62,784		62,784	98,640
General reserves	3,130		3,130	3,603
Impaired loans	736		736	2,180
Impaired loans classified as Troubled debt restructuring (TDR)	736		736	2,132
Changes In Loans Modified As Troubled Debt Restructurings	363		621		$ 1,074
Loans Modified As Troubled Debt Restructuring That Have Subsequently Experienced Payment Default	49	$ 95
Other Commercial [Member]
Impaired Loans
Recorded investment in loans with no specific allowance	0		0	0
Unpaid principal balance with no specific allowance	0		0	0
Average investment with no specific allowance	0			0
Recorded investment in loans with a specific allowance	0		0	0
Unpaid principal balance with a specific allowance	0		0	0
Allowance for losses (specific reserves)	0		$ 0	0
Average investment with a specific allowance	$ 0			$ 1

No definition available.

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- Definition

Reflects the amount of interest income on impaired and nonperforming loans that was recognized as income during the reporting period.

+ References

No definition available.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of allowance for credit losses related to recorded investment.

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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

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Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

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- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

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Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

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