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INVESTMENTS - Associates and Joint Venture Investment Impact (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Current assets | $ 6,929 | $ 5,117
Current liabilities | (6,586) | (5,964)
Net income for the year | 1,592 | 2,043
Associates | Joint ventures |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Current assets | 512 | 491
Long-term assets | 3,409 | 3,501
Current liabilities | (857) | (906)
Long-term liabilities | (1,358) | (1,407)
Total net assets | 1,706 | 1,679
Our share of net assets | 900 | 851
Revenue | 1,310 | 2,314
Expenses | (1,410) | (2,366)
Net income for the year | (100) | (52)
Our share of net loss | $ (40) | $ (24)

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