SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accrued Liabilities - Non Current (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accounting Policies [Abstract]
Long term tax liabilities	$ 2,393	$ 2,204
Environmental remediation liabilities	1,719	1,759
Pension and postretirement obligations	985	1,022
Operating lease liabilities	605	469
Other	1,609	1,361
Accrued liabilities - non-current	$ 7,311	$ 6,815
Environmental loss contingency, noncurrent, statement of financial position	Other deferred credits and liabilities	Other deferred credits and liabilities
Operating lease, liability, noncurrent, statement of financial position	Other deferred credits and liabilities	Other deferred credits and liabilities