Supplemental Cash Flows Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
All other operating activities
Amortization of Intangible Assets	$ 408us-gaap_AmortizationOfIntangibleAssets	$ 425us-gaap_AmortizationOfIntangibleAssets	$ 447us-gaap_AmortizationOfIntangibleAssets
Net realized losses on investment securities	17us-gaap_GainLossOnSaleOfSecuritiesNet	523us-gaap_GainLossOnSaleOfSecuritiesNet	34us-gaap_GainLossOnSaleOfSecuritiesNet
Cash collateral on derivative contracts	745	(2,271)	2,900
Increase (decrease) in other liabilities	(1,771)	2,334	560
Other	841	(912)	1,477
All other operating activities	240	99	5,418
Net decrease (increase) in financing receivables
Increase in loans to customers	(323,050)us-gaap_IncreaseDecreaseInOtherLoans	(311,860)us-gaap_IncreaseDecreaseInOtherLoans	(308,156)us-gaap_IncreaseDecreaseInOtherLoans
Principal collections from customers - loans	302,618	307,849	307,250
Investment in equipment for financing leases	(8,120)	(8,652)	(9,192)
Principal collections from customers - financing leases	8,421	9,646	10,976
Net change in credit card receivables	(5,571)gecc_NetChangeInCreditCardReceivables	(8,058)gecc_NetChangeInCreditCardReceivables	(8,030)gecc_NetChangeInCreditCardReceivables
Sales of financing receivables	20,013	14,664	12,642
Net decrease (increase) in financing receivables	5,689	(3,589)	(5,490)
All other investing activities
Purchases of investment securities	(10,346)	(16,422)	(15,666)
Dispositions and maturities of investment securities	9,289	18,139	17,010
Decrease (increase) in other assets - investments	(476)	1,089	4,338
Proceeds from sales of real estate properties	5,920	10,680	3,381
Other	2,610	1,486	2,731
All other investing activities	6,997	14,972	11,794
Newly issued debt (maturities longer than 90 days)
Short-term (91 to 365 days)	29	55	59
Long-term (longer than one year)	34,435	44,833	55,782
Newly issued debt (maturities longer than 90 days)	34,464	44,888	55,841
Repayments and other reductions (maturities longer than 90 days)
Short-term (91 to 365 days)	(47,694)	(52,553)	(94,114)
Long-term (longer than one year)	(4,909)us-gaap_RepaymentsOfLongTermDebt	(3,291)us-gaap_RepaymentsOfLongTermDebt	(9,368)us-gaap_RepaymentsOfLongTermDebt
Principal payments - nonrecourse, leveraged leases	(454)us-gaap_RepaymentsOfOtherDebt	(585)us-gaap_RepaymentsOfOtherDebt	(426)us-gaap_RepaymentsOfOtherDebt
Repayments and other debt reductions (maturities longer than 90 days)	(53,057)	(56,429)	(103,908)
All Other Financing Activities
Proceeds from sales of investment contracts	322	491	2,697
Redemption of investment contracts	(1,113)	(980)	(5,515)
Other	(300)	(420)	(49)
All other financing activities	$ (1,091)	$ (909)	$ (2,867)

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Increase decrease in financing receivables related to net changes in credit card receivables.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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The increase (decrease) during the reporting period in the amount of cash held either as collateral directly or provided to third parties associated with derivative instruments. Upon the occurrence of any specified triggering event or condition associated with the derivative, these amounts can be utilized to recover all or a portion of the amounts due or payable under the derivative.

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The increase (decrease) during the reporting period in outstanding loans including accrued interest.

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The increase (decrease) during the reporting period in the amount due from lessees arising from lease agreements.

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The increase (decrease) during the reporting period in loans that are classified as working capital and are not otherwise defined in the taxonomy.

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The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities.

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The increase (decrease) during the reporting period in other liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current liabilities, other noncurrent liabilities, or a combination of other current and noncurrent liabilities.

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Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example, cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities.

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The cash inflow from an insurance contract under which the policy holder make a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date.

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The cash inflow associated with the collection of receivables arising from the lease of real estate, equipment or other fixed assets for a specified time in exchange for payment, usually in the form of rent; excludes proceeds from sales-type lease transactions, which are classified as operating activities.

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The cash inflow associated with the collection of policy loans receivable.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash inflow from a borrowing net of the cash outflow from repayment of a borrowing having initial term of repayment of more than three months. Includes long-term debt and short-term debt.

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No definition available.

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The cash inflow associated with the sale or collection of receivables arising from the financing of goods and services.

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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

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Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

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The cash inflow from a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

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The cash outflow for an insurance contract under which the policy holder make a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date.

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The cash outflow from a repayment of a borrowing having initial term of repayment of more than three months. Includes repayments of short-term and long-term debt.

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No definition available.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for the payment of other borrowing not otherwise defined in the taxonomy.

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The cash outflow from a repayment of a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

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