ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Changes in Goodwill Balances (Details) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Goodwill
Beginning balance	$ 70,438
Acquisitions	16,553
Dispositions, currency exchange and other	78
Ending balance	87,068
Power
Goodwill
Beginning balance	26,403
Acquisitions	55
Dispositions, currency exchange and other	(1,219)
Ending balance	25,239
Renewable Energy
Goodwill
Beginning balance	2,507
Acquisitions	1,503
Dispositions, currency exchange and other	230
Ending balance	4,240
Oil & Gas
Goodwill
Beginning balance	10,363
Acquisitions	14,207
Dispositions, currency exchange and other	315
Ending balance	24,885
Aviation
Goodwill
Beginning balance	9,455
Acquisitions	17
Dispositions, currency exchange and other	606
Ending balance	10,077
Healthcare
Goodwill
Beginning balance	17,424
Acquisitions	50
Dispositions, currency exchange and other	92
Ending balance	17,566
Transportation
Goodwill
Beginning balance	899
Acquisitions	0
Dispositions, currency exchange and other	26
Ending balance	925
Lighting
Goodwill
Beginning balance	281
Acquisitions	0
Dispositions, currency exchange and other	10
Ending balance	291
Capital
Goodwill
Beginning balance	2,368
Acquisitions	0
Dispositions, currency exchange and other	2
Ending balance	2,370
Corporate
Goodwill
Beginning balance	739
Acquisitions	722
Dispositions, currency exchange and other	16
Ending balance	$ 1,476

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.

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

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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