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Other Long-Term Assets - Schedule of other long-term assets (Details) - CAD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Subclassifications of assets, liabilities and equities [abstract] |  |
North West Redwater Partnership subordinated debt | $ 652 | $ 591
Prepaid cost of service toll | 130 | 62
Investment in North West Redwater Partnership | 0 | 287
Risk management (note 19) | 290 | 373
Long-term inventory | 121 | 96
Other | 84 | 50
Other assets | 1,277 | 1,459
Less: current portion | 54 | 116
Other long-term assets | $ 1,223 | $ 1,343

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