Goodwill and Other Intangible Assets (Changes in Goodwill Balances) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 26,195us-gaap_Goodwill	$ 26,971us-gaap_Goodwill
Acquisitions	0us-gaap_GoodwillAcquiredDuringPeriod	17us-gaap_GoodwillAcquiredDuringPeriod
Dispositions, currency exchange and other	(1,169)	(793)
Goodwill, period increase (decrease)	(1,169)us-gaap_GoodwillPeriodIncreaseDecrease	(776)us-gaap_GoodwillPeriodIncreaseDecrease
Goodwill, Ending Balance	25,026us-gaap_Goodwill	26,195us-gaap_Goodwill
CLL [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	13,522	13,454
Acquisitions	0	3
Dispositions, currency exchange and other	(464)	65
Goodwill, Ending Balance	13,058	13,522
Consumer [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	10,277	10,882
Acquisitions	0	14
Dispositions, currency exchange and other	(500)	(619)
Goodwill, Ending Balance	9,777	10,277
Real Estate [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	742	926
Acquisitions	0	0
Dispositions, currency exchange and other	(205)	(184)
Goodwill, Ending Balance	537	742
Energy Financial Services [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,507	1,562
Acquisitions	0	0
Dispositions, currency exchange and other	0	(55)
Goodwill, Ending Balance	1,507	1,507
GECAS [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	147	147
Acquisitions	0	0
Dispositions, currency exchange and other	0	0
Goodwill, Ending Balance	$ 147	$ 147

Changes in goodwill related to dispositions, currency exchange and other effects.

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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Balance Type:	debit
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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

+ Details

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- Details

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- Details

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- Details

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- Details

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