Goodwill and Other Intangible Assets (Changes in Goodwill Balances) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 24,489us-gaap_Goodwill
Acquisitions	752us-gaap_GoodwillAcquiredDuringPeriod
Dispositions, currency exchange and other	(5,602)
Goodwill, period increase (decrease)	4,850us-gaap_GoodwillPeriodIncreaseDecrease
Goodwill, Ending Balance	19,639us-gaap_Goodwill
Total CLL [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	13,058
Acquisitions	0
Dispositions, currency exchange and other	(4,928)
Goodwill, Ending Balance	8,130
Consumer [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	9,777
Acquisitions	0
Dispositions, currency exchange and other	(673)
Goodwill, Ending Balance	9,104
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	752
Dispositions, currency exchange and other	(1)
Goodwill, Ending Balance	$ 898

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

No definition available.

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Data Type:	xbrli:monetaryItemType
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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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Namespace Prefix:	us-gaap_
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
Period Type:	duration

- 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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Data Type:	na
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- Details

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Data Type:	na
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- Details

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