ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS - Baker Hughes (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jul. 03, 2017	Dec. 31, 2017	Sep. 30, 2017
BHGE
Business Acquisition [Line Items]
Increase (decrease) to additional paid in capital		$ (126)	$ 1,131
Correction for currency translation adjustments		930
Decrease in additional paid in capital arising from currency translation adjustments and certain basis differences		1,257
Decrease in goodwill		851
Step-up to fair value of property, plant and equipment		682
Tax asset recorded through purchase accounting		572
Reduction of intangible assets		367
Net increase to depreciation and amortization expense		$ 63
BHGE | GE
Business Acquisition [Line Items]
Cash consideration	$ 7,498
Ownership interest acquired (as a percent)	62.50%
Total consideration	$ 24,798
Noncontrolling interest	$ 16,462
BHGE | GE | Class B Common Stock
Business Acquisition [Line Items]
Ownership interest acquired (as a percent)	62.50%
BHGE | Baker Hughes
Business Acquisition [Line Items]
Ownership interest acquired (as a percent)	37.50%
BHGE | BHGE | Baker Hughes
Business Acquisition [Line Items]
Special one-time cash dividend (in dollars per share)	$ 17.50
BHGE | BHGE | Class A Common Stock | Baker Hughes
Business Acquisition [Line Items]
Shares of BHGE Class A Common Stock received by Baker Hughes' former shareholders (in shares)	1
Baker Hughes
Business Acquisition [Line Items]
Cash consideration	$ 7,498
Total consideration	24,798
Noncontrolling interest	76
Correction for currency translation adjustments	1,051
Tax asset recorded through purchase accounting	572
Baker Hughes | Oil & Gas
Business Acquisition [Line Items]
Goodwill deductible for tax purposes	$ 67