BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended			12 Months Ended
		Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 114,913			$ 114,913			$ 117,245
Earnings (loss) from continuing operations		(789)		$ (1,164)	(1,229)		$ (1,217)
Assets	[1]	(342,769)			(342,769)			(369,245)
Cash and restricted cash		$ 27,674	[2]	44,559	27,674	[2]	44,559	$ 43,967	[2]
Cash flows from operating activities					(1,947)		(2,035)
Cash flows from investing activities					$ 2,816		2,309
Percentage of LIFO inventory								32.00%
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings								$ (8,061)			$ (4,240)
Revenues								2,224		$ 220
Earnings (loss) from continuing operations								2,668		1,182
Assets								8,317
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract asset								8,255
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Aviation Commercial Engines
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract asset								1,755
ASU 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and restricted cash								668		654
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings								464
ASU 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash flows from operating activities								553
Cash flows from investing activities								553
ASU 2015-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings								(377)			$ (105)
Earnings (loss) from continuing operations				$ (13)			$ (28)	$ (124)		$ (147)

[1] Our consolidated assets at June 30, 2018 included total assets of $4,051 million of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs. These assets included current receivables and net financing receivables of $1,428 million within continuing operations and assets of discontinued operations of $275 million. Our consolidated liabilities at June 30, 2018 included liabilities of certain VIEs for which the VIE creditors do not have recourse to GE. These liabilities included non-recourse borrowings of consolidated securitization entities (CSEs) of $(624) million within continuing operations. See Note 18.

[2] Includes restricted cash of $725 million and $668 million at June 30, 2018 and December 31, 2017, respectively.