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FINANCING EXPENSES (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Finance expenses breakdown |  |
Interest on debt | $ 884 | $ 825
Interest on lease liabilities | 166 | 172
Capitalized interest at 4.8% ( 2019- 5.3%) | (120) | (122)
Interest expense | 930 | 875
Interest on partnership liability | 52 | 55
Interest on pension and other post-retirement benefits | 54 | 59
Accretion | 278 | 270
Foreign exchange gain on U.S. dollar denominated debt | (312) | (624)
Operational foreign exchange and other | (6) | (2)
Total Financing expenses | $ 996 | $ 633
Debt instrument interest percentage | 4.80% | 5.30%

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