INCOME TAXES - Narrative (Details) $ in Millions	1 Months Ended		12 Months Ended
	Dec. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($) jurisdiction tax_return	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Income Tax Contingency [Line Items]
Tax expense recorded resulting from the U.S. tax reform					$ 41
Additional tax expense based on issuance of final regulations on transition tax on historic foreign earnings			$ 49	$ 2
Number of income tax returns filed annually | tax_return			3,600
Number of taxing jurisdictions throughout the globe where we file tax returns on an annual basis | jurisdiction			300
Interest expense (income)			$ (30)	(93)	127
Tax expense (income) related to penalties			(13)	$ 20	$ (7)
Undistributed earnings of foreign affiliates and associated companies	$ 42,000		42,000
Continuing Operations
Income Tax Contingency [Line Items]
Tax benefit	140	$ 378
Net interest benefits	96	107
Discontinued Operations | GE Capital
Income Tax Contingency [Line Items]
Tax benefit	130	332
Net interest benefits	25	$ 46
Her Majesty's Revenue and Customs (HMRC) | Foreign Tax Authority | GE Capital
Income Tax Contingency [Line Items]
Potential impact on disallowance of interest deductions	$ 1,100		$ 1,100