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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Non Designated Derivative Financial Instruments (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Derivative financial instrument assets and liabilities and assets available for sale measured at fair value |  |
Fair value outstanding, beginning of year | $ 89,579 |
Fair value outstanding, end of year | 89,435 | $ 89,579
At fair value |  |
Derivative financial instrument assets and liabilities and assets available for sale measured at fair value |  |
Fair value outstanding, beginning of year |  | (105)
Cash Settlements - received during the year | (254) | (90)
Fair value outstanding, end of year | (39) |
Fair value outstanding, beginning of year | 60 |
Changes in fair value recognized in earnings during the year (note 7) | $ 155 | 255
Fair value outstanding, end of year |  | $ 60

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