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NONCONTROLLING INTERESTS - NONCONTROLLING (Details) - CAD ($) shares in Millions, $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | $ 2,996 | $ 3,364
Algonquin Gas Transmission LLC |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 384 | 394
Maritimes and Northeast Pipeline |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 558 | 579
Renewable energy assets |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 1,646 | 1,864
Westcoast Energy Inc. |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | $ 408 | $ 527
Westcoast Energy Inc. | Cumulative redeemable preferred stock | Preference shares (Note 21) |  |
NONCONTROLLING INTERESTS |  |
Number of redeemable preferred shares held by noncontrolling owners (in shares) | 12.0 | 16.6

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