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NONCONTROLLING INTERESTS - NONCONTROLLING (Details) - CAD ($) shares in Millions, $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | $ 2,542 | $ 2,996
Algonquin Gas Transmission LLC |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 377 | 384
Maritimes and Northeast Pipeline |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 546 | 558
Renewable energy assets |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | 1,503 | 1,646
Westcoast Energy Inc. |  |
NONCONTROLLING INTERESTS |  |
Noncontrolling interests | $ 116 | $ 408
Westcoast Energy Inc. | Cumulative redeemable preferred stock | Preferred Shares |  |
NONCONTROLLING INTERESTS |  |
Number of redeemable preferred shares held by noncontrolling owners (in shares) | 0 | 12

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