CONTRACT AND OTHER DEFERRED ASSETS & PROGRESS COLLECTIONS AND DEFERRED INCOME - Schedule of Contract Assets (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues in excess of billings	$ 8,048	$ 7,766
Billings in excess of revenues	(9,454)	(8,443)
Long-term service agreements	(1,406)	(677)
Other current contract assets	3,443	3,144
Current contract assets	2,037	2,467
Nonrecurring engineering costs	2,460	2,534
Customer advances and other	2,980	3,243
Non-current contract and other deferred assets	5,440	5,776
Total contract and other deferred assets	7,477	8,244
Operating segments | Aerospace
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues in excess of billings	2,527	2,363
Billings in excess of revenues	(7,608)	(6,681)
Long-term service agreements	(5,081)	(4,318)
Other current contract assets	481	433
Current contract assets	(4,600)	(3,884)
Nonrecurring engineering costs	2,438	2,513
Customer advances and other	2,371	2,519
Non-current contract and other deferred assets	4,809	5,032
Total contract and other deferred assets	208	1,148
Operating segments | Renewable Energy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues in excess of billings	0	0
Billings in excess of revenues	0	0
Long-term service agreements	0	0
Other current contract assets	1,154	1,063
Current contract assets	1,154	1,063
Nonrecurring engineering costs	20	17
Customer advances and other	0	0
Non-current contract and other deferred assets	20	17
Total contract and other deferred assets	1,174	1,079
Operating segments | Power
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues in excess of billings	5,522	5,403
Billings in excess of revenues	(1,846)	(1,763)
Long-term service agreements	3,675	3,640
Other current contract assets	1,533	1,404
Current contract assets	5,209	5,044
Nonrecurring engineering costs	2	4
Customer advances and other	609	724
Non-current contract and other deferred assets	611	728
Total contract and other deferred assets	5,820	5,772
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues in excess of billings	0	0
Billings in excess of revenues	0	0
Long-term service agreements	0	0
Other current contract assets	275	245
Current contract assets	275	245
Nonrecurring engineering costs	0	0
Customer advances and other	0	0
Non-current contract and other deferred assets	0	0
Total contract and other deferred assets	$ 275	$ 245