Financing Receivables and Allowance for Losses (Portfolio) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable [Line Items]
Financing receivables, net of deferred income	$ 84,476	$ 126,561
Allowance for losses	(3,393)	(4,104)	$ (4,165)	$ (4,025)
Financing Receivable, Net	81,083	122,457
CLL [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	12,228	14,418
Allowance for losses	(31)	(21)	(22)	(17)
Energy Financial Services [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	2,787	2,580
Allowance for losses	(23)	(26)	(21)	(8)
GECAS [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	7,528	8,263
Allowance for losses	(35)	(46)	(21)	(17)
Other Commercial [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	502	480
Allowance for losses	(2)	0	$ 0	$ (2)
Consumer Portfolio Segment [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	61,431	100,820
Commercial [Member]
Financing Receivable [Line Items]
Financing receivables, net of deferred income	$ 23,045	$ 25,741