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RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
U.S. plans | Pension plans |  |  |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |  |  |
Company contributions (reimbursements) |  | $ 63 | $ 59
U.S. plans | Postretirement benefit plans |  |  |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |  |  |
Company contributions (reimbursements) |  | 5 | 8
Non-U.S. plans | Pension plans |  |  |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |  |  |
Company contributions (reimbursements) |  | 93 | 763
Discretionary contribution | $ 600 |  |
Non-U.S. plans | Postretirement benefit plans |  |  |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |  |  |
Company contributions (reimbursements) |  | $ 11 | $ 9

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- Definition Defined Benefit Plan Cash Contributions Paid by Employer + References No definition available. + Details
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- Definition Defined Benefit Plan, Plan Assets, Contributions by (Reimbursements to) Employer + References No definition available. + Details
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- References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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