LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions			1 Months Ended	6 Months Ended	12 Months Ended
	Jun. 21, 2024 USD ($)	Apr. 24, 2009 USD ($)	Jun. 30, 2006 subsidiary	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 22, 2024 USD ($)	May 31, 2017 lawsuit
Loss Contingencies [Line Items]
Liabilities recorded relative to environmental matters				$ 687	$ 680
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]				Other noncurrent liabilities	Other noncurrent liabilities
Environmental costs eligible for future recovery				$ 620	$ 613
Period over which costs and recovery of costs is projected (in years)				20 years
Outstanding letters of credit, surety bonds, and third-party guarantees				$ 2,800	2,900
Third-party guarantees				$ 347	$ 1,000
Guarantees of contractual performance of joint ventures (as percent)				26.00%	75.00%
N.Y. Metropolitan Transportation Authority
Loss Contingencies [Line Items]
Contract value		$ 323
Contract payments received to date		241
Damages sought by plaintiff		190
Claims for monetary damages against the plaintiff		$ 95
Armed Services Board of Contract Appeals | Pending Litigation
Loss Contingencies [Line Items]
Current estimated losses						$ 132
Sikorsky Aircraft Corporation
Loss Contingencies [Line Items]
Number of pending claims | lawsuit							2
Number of entities involved in litigation | subsidiary			2
Sikorsky Aircraft Corporation | U.S. Government
Loss Contingencies [Line Items]
Litigation settlement paid	$ 70