SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2016
Class of Stock [Line Items]
Preferred stock issued	$ 6	$ 6	$ 6
Noncontrolling interests	1,524	1,545	$ 1,219
Redeemable noncontrolling interests	498	$ 439
GE
Class of Stock [Line Items]
Preferred stock issued	5,871
Increased preferred stock	$ 5,944
GE | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock issued				$ 5,694
GE | Series A, B and C Preferred Stock
Class of Stock [Line Items]
Preferred stock, value outstanding				$ 250