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FINANCING EXPENSES (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Finance expenses breakdown |  |
Interest on debt | $ 834 | $ 884
Interest on lease liabilities | 161 | 166
Capitalized interest at 5.0% ( 2020 - 4.8%) | (144) | (120)
Interest expense | 851 | 930
Interest on partnership liability | 51 | 52
Interest on pension and other post-retirement benefits | 59 | 54
Accretion | 304 | 278
Foreign exchange gain on U.S. dollar denominated debt | (113) | (312)
Operational foreign exchange and other | 23 | (6)
Loss on extinguishment of long-term debt | 80 |
Total Financing expenses | $ 1,255 | $ 996
Interest rate | 5.00% | 4.80%

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- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2021-01-01 -Paragraph 52 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=21&code=ifrs-tx-2021-en-r&anchor=para_52_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 35 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_35&doctype=Standard -URIDate 2021-03-24 + Details
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