Goodwill and Other Intangible Assets (Changes in Goodwill Balances) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 26,195
Acquisitions	0
Dispositions, currency exchange and other	(529)
Goodwill, period increase (decrease)	(529)
Goodwill, Ending Balance	25,666
Discount rates used in reporting unit valuations minimum rate	10.50%
Discount rates used in reporting unit valuations maximum rate	13.30%
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount		3,700
CLL [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	13,522
Acquisitions	0
Dispositions, currency exchange and other	(205)
Goodwill, Ending Balance	13,317
Consumer [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	10,277
Acquisitions	0
Dispositions, currency exchange and other	(222)
Goodwill, Ending Balance	10,055
Real Estate [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	742
Acquisitions	0
Dispositions, currency exchange and other	(103)
Goodwill, Ending Balance	639
Energy Financial Services [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,507
Acquisitions	0
Dispositions, currency exchange and other	1
Goodwill, Ending Balance	1,508
GECAS [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	147
Acquisitions	0
Dispositions, currency exchange and other	0
Goodwill, Ending Balance	$ 147