CONTRACT AND OTHER DEFERRED ASSETS & PROGRESS COLLECTIONS AND DEFERRED INCOME - Progress Collections and Deferred Income (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Capitalized Contract Cost [Line Items]
Progress collections	$ 20,180	$ 19,106
Current deferred income	539	571
Progress collections and current deferred income	20,718	19,677
Non-current deferred income	1,297	1,339
Total Progress collections and deferred income	22,016	21,017
Operating segments | Aerospace
Capitalized Contract Cost [Line Items]
Progress collections	6,401	6,198
Current deferred income	179	201
Progress collections and current deferred income	6,580	6,399
Non-current deferred income	1,084	1,150
Total Progress collections and deferred income	7,664	7,549
Operating segments | Renewable Energy
Capitalized Contract Cost [Line Items]
Progress collections	7,554	6,886
Current deferred income	221	239
Progress collections and current deferred income	7,775	7,125
Non-current deferred income	149	122
Total Progress collections and deferred income	7,924	7,247
Operating segments | Power
Capitalized Contract Cost [Line Items]
Progress collections	6,091	5,898
Current deferred income	11	20
Progress collections and current deferred income	6,103	5,918
Non-current deferred income	46	48
Total Progress collections and deferred income	6,148	5,965
Corporate
Capitalized Contract Cost [Line Items]
Progress collections	134	124
Current deferred income	127	112
Progress collections and current deferred income	261	236
Non-current deferred income	19	20
Total Progress collections and deferred income	$ 279	$ 256