REVENUES - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 19,084	$ 18,569	$ 54,769	$ 53,893
Operating segments
Disaggregation of Revenue [Line Items]
Total revenues	18,440	17,970	52,725	52,076
Operating segments | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	8,162	9,087	22,945	25,744
Operating segments | Services
Disaggregation of Revenue [Line Items]
Total revenues	10,279	8,883	29,780	26,333
Operating segments | Aerospace
Disaggregation of Revenue [Line Items]
Total revenues	6,705	5,398	18,434	15,230
Operating segments | Aerospace | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	1,968	1,837	5,379	5,549
Operating segments | Aerospace | Services
Disaggregation of Revenue [Line Items]
Total revenues	4,736	3,562	13,055	9,681
Operating segments | Aerospace | Commercial Engines & Services
Disaggregation of Revenue [Line Items]
Total revenues	4,971	3,602	13,130	10,071
Operating segments | Aerospace | Military
Disaggregation of Revenue [Line Items]
Total revenues	1,027	1,107	3,159	3,104
Operating segments | Aerospace | Systems & Other
Disaggregation of Revenue [Line Items]
Total revenues	707	689	2,146	2,055
Operating segments | HealthCare
Disaggregation of Revenue [Line Items]
Total revenues	4,613	4,339	13,494	13,100
Operating segments | HealthCare | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	2,352	2,187	6,945	6,671
Operating segments | HealthCare | Services
Disaggregation of Revenue [Line Items]
Total revenues	2,261	2,151	6,549	6,429
Operating segments | HealthCare | Healthcare Systems
Disaggregation of Revenue [Line Items]
Total revenues	4,086	3,832	11,998	11,572
Operating segments | HealthCare | Pharmaceutical Diagnostics
Disaggregation of Revenue [Line Items]
Total revenues	527	507	1,496	1,528
Operating segments | Renewable Energy
Disaggregation of Revenue [Line Items]
Total revenues	3,594	4,208	9,564	11,505
Operating segments | Renewable Energy | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	2,887	3,695	7,505	9,844
Operating segments | Renewable Energy | Services
Disaggregation of Revenue [Line Items]
Total revenues	707	512	2,059	1,661
Operating segments | Renewable Energy | Onshore Wind
Disaggregation of Revenue [Line Items]
Total revenues	2,445	3,047	6,403	8,048
Operating segments | Renewable Energy | Grid Solutions equipment and services
Disaggregation of Revenue [Line Items]
Total revenues	744	759	2,145	2,330
Operating segments | Renewable Energy | Hydro, Offshore Wind and Hybrid Solutions
Disaggregation of Revenue [Line Items]
Total revenues	405	401	1,016	1,126
Operating segments | Power
Disaggregation of Revenue [Line Items]
Total revenues	3,529	4,026	11,233	12,242
Operating segments | Power | Equipment
Disaggregation of Revenue [Line Items]
Total revenues	954	1,368	3,116	3,680
Operating segments | Power | Services
Disaggregation of Revenue [Line Items]
Total revenues	2,575	2,658	8,117	8,561
Operating segments | Power | Gas Power
Disaggregation of Revenue [Line Items]
Total revenues	2,612	2,861	8,234	8,739
Operating segments | Power | Steam Power
Disaggregation of Revenue [Line Items]
Total revenues	571	790	1,898	2,327
Operating segments | Power | Power Conversion, Nuclear and other
Disaggregation of Revenue [Line Items]
Total revenues	346	376	1,101	1,176
Corporate
Disaggregation of Revenue [Line Items]
Total revenues	$ 643	$ 599	$ 2,044	$ 1,816