REVENUES - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 14,486	$ 12,675
Operating segments
Disaggregation of Revenue [Line Items]
Total revenues	13,638	11,975
Operating segments | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	5,387	4,792
Operating segments | Services
Disaggregation of Revenue [Line Items]
Total revenues	8,252	7,183
Operating segments | Aerospace
Disaggregation of Revenue [Line Items]
Total revenues	6,981	5,603
Operating segments | Aerospace | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	1,974	1,654
Operating segments | Aerospace | Services
Disaggregation of Revenue [Line Items]
Total revenues	5,007	3,949
Operating segments | Aerospace | Commercial Engines & Services
Disaggregation of Revenue [Line Items]
Total revenues	5,194	3,853
Operating segments | Aerospace | Military
Disaggregation of Revenue [Line Items]
Total revenues	1,018	1,036
Operating segments | Aerospace | Systems & Other
Disaggregation of Revenue [Line Items]
Total revenues	770	714
Operating segments | Renewable Energy
Disaggregation of Revenue [Line Items]
Total revenues	2,837	2,871
Operating segments | Renewable Energy | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	2,311	2,173
Operating segments | Renewable Energy | Services
Disaggregation of Revenue [Line Items]
Total revenues	527	698
Operating segments | Renewable Energy | Onshore Wind
Disaggregation of Revenue [Line Items]
Total revenues	1,502	1,906
Operating segments | Renewable Energy | Grid Solutions equipment and services
Disaggregation of Revenue [Line Items]
Total revenues	824	668
Operating segments | Renewable Energy | Hydro, Offshore Wind and Hybrid Solutions
Disaggregation of Revenue [Line Items]
Total revenues	511	297
Operating segments | Power
Disaggregation of Revenue [Line Items]
Total revenues	3,820	3,501
Operating segments | Power | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	1,102	965
Operating segments | Power | Services
Disaggregation of Revenue [Line Items]
Total revenues	2,718	2,536
Operating segments | Power | Gas Power
Disaggregation of Revenue [Line Items]
Total revenues	2,867	2,489
Operating segments | Power | Steam Power
Disaggregation of Revenue [Line Items]
Total revenues	541	636
Operating segments | Power | Power Conversion, Nuclear and other
Disaggregation of Revenue [Line Items]
Total revenues	412	377
Corporate
Disaggregation of Revenue [Line Items]
Total revenues	$ 848	$ 700