GECC Financing Receivables and Allowance for Losses (Allowance for Losses on Financing Receivables) (Details) - GECC - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 4,104	$ 4,025	$ 4,025
Provision charged	4,636	2,693
Other	(252)	(123)	(123)
Gross write-offs	(5,680)	(3,242)	(3,242)
Recoveries	649	878	878
Ending Balance	3,457	4,231	4,104
Restructuring Charges
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision charged	2,405
Gross write-offs	2,859
CLL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	21	17	17
Provision charged	20	8
Other	0	(1)
Gross write-offs	(15)	(11)
Recoveries	6	7
Ending Balance	32	20	21
Energy Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	26	8	8
Provision charged	16	13
Other	0	0
Gross write-offs	(29)	(17)
Recoveries	1	2
Ending Balance	14	6	26
GECAS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	46	17	17
Provision charged	(11)	9
Other	0	0
Gross write-offs	(1)	(11)
Recoveries	3	0
Ending Balance	37	15	46
Other Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	0	2	2
Provision charged	15	0
Other	0	(2)
Gross write-offs	(13)	0
Recoveries	0	0
Ending Balance	2	0	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	93	44	44
Provision charged	40	30
Other	0	(3)
Gross write-offs	(58)	(39)
Recoveries	10	9
Ending Balance	85	41	93
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	4,011	3,981	3,981
Provision charged	4,596	2,663
Other	(252)	(120)
Gross write-offs	(5,622)	(3,203)
Recoveries	639	869
Ending Balance	$ 3,372	$ 4,190	$ 4,011