RESTRUCTURING CHARGES AND SEPARATION COSTS - Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 233	$ 161
Restructuring and other charges cash expenditures	154	137
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	105	36
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	128	125
Operating segments | Aerospace
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	10	4
Operating segments | Renewable Energy
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	96	65
Operating segments | Power
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	47	19
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	80	72
Workforce reductions
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	141	66
Plant closures & associated costs and other asset write-downs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	85	82
Acquisition/disposition net charges and other
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	7	12
Non-cash asset impairment, accelerated depreciation and other charges
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 125	$ 75