RESTRUCTURING CHARGES AND SEPARATION COSTS - Restructuring and Other Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 706	$ 845	$ 664
Restructuring and other charges cash expenditures	508	415	683
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	157	206	348
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	549	669	390
Other (income) loss
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	0	(31)	(75)
Operating segments | Aerospace
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	13	20	70
Operating segments | Renewable Energy
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	296	177	204
Operating segments | Power
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	107	155	369
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	290	494	20
Workforce reductions
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	392	281	568
Plant closures & associated costs and other asset write-downs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	258	533	117
Acquisition/disposition net charges and other
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	56	30	(21)
Non-cash asset impairment, accelerated depreciation and other charges
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 303	$ 366	$ 114