INCOME TAXES - Components of Net Deferred Income Tax Assets (Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Assets	$ 13,679	$ 11,388
Liabilities	(1,598)	(1,499)
Net deferred income tax asset (liability)	12,081	9,889
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Non-U.S. loss carryforwards	2,008
Net Operating Loss Carryforwards Expiring in Various Years Ending from 2021 Through 2023
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Non-U.S. loss carryforwards	19
Net Operating Loss Carryforwards Expiring in Various Years Ending from 2024 Through 2040
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Non-U.S. loss carryforwards	112
Net Operating Loss Carryforwards That May be Carried Forward Indefinitely
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Non-U.S. loss carryforwards	1,957
GE Industrial
Income Tax Contingency [Line Items]
Assets	10,069	8,888
Net deferred income tax asset (liability)	9,350	8,189
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Principal pension plans	3,666	4,016
Provision for expenses	2,258	1,990
Other compensation and benefits	1,968	2,206
Principal retiree benefit plans	1,026	1,023
Capitalized expenditures	993	860
Non-U.S. loss carryforwards	814	602
Intangible assets	486	1,315
Baker Hughes investment	(973)	(1,256)
Depreciation	(676)	(823)
Contract assets	(460)	(1,232)
Other – net	248	(512)
Valuation allowances related to assets other than non-U.S. loss carryforwards	898	1,897
GE Industrial | Valuation Allowance for Non-U.S. Loss Carryforwards
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Valuation allowances	5,934	4,801
GE Industrial | Operating segments
Income Tax Contingency [Line Items]
Liabilities	(719)	(699)
GE Capital
Income Tax Contingency [Line Items]
Assets	3,610	2,500
Net deferred income tax asset (liability)	2,731	1,700
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Capitalized expenditures	799	742
Non-U.S. loss carryforwards	1,194	1,274
Other – net	1,347	664
Insurance company loss reserves	1,684	1,715
Operating leases	(1,900)	(2,218)
Financing leases	(393)	(477)
Valuation allowances related to assets other than non-U.S. loss carryforwards	221	248
GE Capital | Valuation Allowance for Non-U.S. Loss Carryforwards
COMPONENTS OF THE NET DEFERRED INCOME TAX ASSET (LIABILITY)
Valuation allowances	265	201
GE Capital | Operating segments
Income Tax Contingency [Line Items]
Liabilities	$ (879)	$ (800)