POSTRETIREMENT BENEFIT PLANS - Asset Allocation (Narrative) (Details) - GE Pension Plan - Principal pension	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Sector concentration of assets (as a percent) (not exceeded)	15.00%
Qualifying employer securities (GE securities)
Defined Benefit Plan Disclosure [Line Items]
Plan assets (as a percent)	0.60%	0.60%

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Data Type:	num:percentItemType
Balance Type:	na
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