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OTHER LIABILITIES
 12 Months Ended
Dec. 31, 2020
Other Liabilities Disclosure [Abstract]  
OTHER LIABILITIES OTHER LIABILITIES
December 31 (millions of dollars)
20202019
Regulatory liabilities38 29 
Other liabilities9 7 
47 36 
The Partnership collects estimated future removal costs related to its transmission and gathering facilities in its current rates (also known as “negative salvage”) and recognizes regulatory liabilities in this respect on the balance sheet. Estimated costs associated with the future removal of transmission and gathering facilities are collected through depreciation as allowed by FERC. These amounts do not represent asset retirement obligations as defined by FASB Accounting Standards Codification (ASC) 410, Accounting for Asset Retirement Obligations. (Refer to Note 2)