RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
U.S. \| Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Estimated future contributions made by the Company			$ 0
Cash contributions made by the Company			0	$ 0
Estimated benefits paid directly by (reimbursements to) the Company			55
Benefits paid directly by (reimbursements to) the Company			55	59
U.S. \| Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Estimated future contributions made by the Company			0
Cash contributions made by the Company			0	0
Estimated benefits paid directly by (reimbursements to) the Company			5
Benefits paid directly by (reimbursements to) the Company			19	8
Non-U.S. \| Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Estimated future contributions made by the Company			80
Cash contributions made by the Company			310	713
Estimated benefits paid directly by (reimbursements to) the Company			38
Benefits paid directly by (reimbursements to) the Company			53	50
Non-U.S. \| Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Estimated future contributions made by the Company			4
Cash contributions made by the Company			202	4
Estimated benefits paid directly by (reimbursements to) the Company			8
Benefits paid directly by (reimbursements to) the Company			$ 6	$ 5
Mexico \| Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Cash contributions made by the Company	$ 40	$ 600
Mexico \| Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Cash contributions made by the Company	210
Korea \| Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Cash contributions made by the Company	$ 190