FINANCIAL INSTRUMENTS - Fair Value of Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gross Notional	$ 117,854	$ 123,535
Assets
Assets	2,395	2,279
Gross accrued interest recognized in statement of financial position	133	209
Gross derivatives recognized in statement of financial position	2,528	2,489
Netting adjustments offset in statement of financial position	(828)	(963)
Cash collateral offset in statement of financial position	(1,034)	(1,042)
Amounts offset in statement of financial position	(1,862)	(2,005)
Net derivatives	666	483
Securities held as collateral not offset in statement of financial position	(326)	(235)
Net amount	340	248
Liabilities
Amount	1,306	1,902
Gross accrued interest recognized in statement of financial position	10	6
Gross derivatives recognized in statement of financial position	1,315	1,908
Netting adjustments offset in statement of financial position	(829)	(971)
Cash collateral offset in statement of financial position	(168)	(267)
Amounts offset in statement of financial position	(997)	(1,238)
Net derivatives	318	670
Securities held as collateral not offset in statement of financial position	0	0
Net amount	318	670
Excess cash collateral received	41	3
Excess cash collateral posted	239	439
Excess securities collateral received	50	0
Counterparties
Assets
Net amount	256
Liabilities
Net amount	281
GE Capital
Derivative [Line Items]
Gross Notional	75,714	79,082
GE
Derivative [Line Items]
Gross Notional	42,139	44,453
Derivatives accounted for as hedges
Derivative [Line Items]
Gross Notional	28,958	30,873
Assets
Assets	1,645	1,511
Liabilities
Amount	135	145
Derivatives accounted for as hedges | Interest rate contracts
Derivative [Line Items]
Gross Notional	21,830	22,904
Assets
Assets	1,530	1,335
Liabilities
Amount	24	23
Derivatives accounted for as hedges | Currency exchange contracts
Derivative [Line Items]
Gross Notional	7,128	7,970
Assets
Assets	115	175
Liabilities
Amount	110	121
Derivatives not accounted for as hedges
Derivative [Line Items]
Gross Notional	88,896	92,662
Assets
Assets	750	769
Liabilities
Amount	1,171	1,757
Derivatives not accounted for as hedges | Interest rate contracts
Derivative [Line Items]
Gross Notional	7,547	6,198
Assets
Assets	28	28
Liabilities
Amount	1	2
Derivatives not accounted for as hedges | Currency exchange contracts
Derivative [Line Items]
Gross Notional	78,808	83,841
Assets
Assets	685	727
Liabilities
Amount	1,035	1,546
Derivatives not accounted for as hedges | Other contracts
Derivative [Line Items]
Gross Notional	2,541	2,622
Assets
Assets	37	13
Liabilities
Amount	$ 135	$ 209