REVENUES - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 16,699	$ 14,127	$ 31,185	$ 26,802
Operating segments
Disaggregation of Revenue [Line Items]
Total revenues	15,861	13,428	29,499	25,403
Operating segments | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	6,825	5,399	12,212	10,190
Operating segments | Services
Disaggregation of Revenue [Line Items]
Total revenues	9,035	8,030	17,287	15,213
Operating segments | Aerospace
Disaggregation of Revenue [Line Items]
Total revenues	7,860	6,127	14,841	11,730
Operating segments | Aerospace | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	2,533	1,757	4,507	3,411
Operating segments | Aerospace | Services
Disaggregation of Revenue [Line Items]
Total revenues	5,327	4,370	10,334	8,319
Operating segments | Aerospace | Commercial Engines & Services
Disaggregation of Revenue [Line Items]
Total revenues	5,700	4,306	10,894	8,159
Operating segments | Aerospace | Defense
Disaggregation of Revenue [Line Items]
Total revenues	1,342	1,096	2,359	2,132
Operating segments | Aerospace | Systems & Other
Disaggregation of Revenue [Line Items]
Total revenues	818	725	1,587	1,439
Operating segments | Renewable Energy
Disaggregation of Revenue [Line Items]
Total revenues	3,849	3,099	6,687	5,970
Operating segments | Renewable Energy | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	3,219	2,445	5,530	4,618
Operating segments | Renewable Energy | Services
Disaggregation of Revenue [Line Items]
Total revenues	630	654	1,157	1,352
Operating segments | Renewable Energy | Onshore Wind
Disaggregation of Revenue [Line Items]
Total revenues	2,316	2,052	3,817	3,958
Operating segments | Renewable Energy | Grid Solutions equipment and services
Disaggregation of Revenue [Line Items]
Total revenues	923	733	1,747	1,401
Operating segments | Renewable Energy | Hydro, Offshore Wind and Hybrid Solutions
Disaggregation of Revenue [Line Items]
Total revenues	611	314	1,122	611
Operating segments | Power
Disaggregation of Revenue [Line Items]
Total revenues	4,152	4,202	7,971	7,703
Operating segments | Power | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	1,073	1,196	2,175	2,162
Operating segments | Power | Services
Disaggregation of Revenue [Line Items]
Total revenues	3,078	3,006	5,796	5,542
Operating segments | Power | Gas Power
Disaggregation of Revenue [Line Items]
Total revenues	3,052	3,133	5,919	5,621
Operating segments | Power | Steam Power
Disaggregation of Revenue [Line Items]
Total revenues	649	691	1,191	1,327
Operating segments | Power | Power Conversion, Nuclear and other
Disaggregation of Revenue [Line Items]
Total revenues	450	378	861	755
Corporate
Disaggregation of Revenue [Line Items]
Total revenues	$ 839	$ 699	$ 1,686	$ 1,399