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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 |  |  |  |  |  |

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