Acquisitions, Goodwill and Other Intangible Assets (Changes in Goodwill Balances) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 11,456
Acquisitions	733
Dispositions, currency exchange and other	(495)
Goodwill, period increase (decrease)	238
Goodwill, Ending Balance	11,694
CLL [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	25
Acquisitions	0
Dispositions, currency exchange and other	86
Goodwill, Ending Balance	111
Consumer [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	9,777
Acquisitions	0
Dispositions, currency exchange and other	(581)
Goodwill, Ending Balance	9,196
Energy Financial Services [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,507
Acquisitions	0
Dispositions, currency exchange and other	0
Goodwill, Ending Balance	1,507
GECAS [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	147
Acquisitions	733
Dispositions, currency exchange and other	0
Goodwill, Ending Balance	$ 880