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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Fair Value Hierarchy (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Derivative Financial Instrument |  |
Balance, at fair value | $ (98) | $ (121)
Transfers of financial liabilities from level 1 to 2 | 0 |
Transfers of financial liabilities from level 2 to 1 | 0 |
Trade receivables |  |
Derivative Financial Instrument |  |
Financial assets, at fair value | 123 | 153
Accounts Payable |  |
Derivative Financial Instrument |  |
Financial liabilities, at fair value | (221) | (274)
Level 1 |  |
Derivative Financial Instrument |  |
Balance, at fair value | (99) | (139)
Level 1 | Trade receivables |  |
Derivative Financial Instrument |  |
Financial assets, at fair value | 35 | 63
Level 1 | Accounts Payable |  |
Derivative Financial Instrument |  |
Financial liabilities, at fair value | (134) | (202)
Level 2 |  |
Derivative Financial Instrument |  |
Balance, at fair value | 1 | 18
Level 2 | Trade receivables |  |
Derivative Financial Instrument |  |
Financial assets, at fair value | 88 | 90
Level 2 | Accounts Payable |  |
Derivative Financial Instrument |  |
Financial liabilities, at fair value | $ (87) | $ (72)

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- Definition The amount of transfers out of Level 1 and into Level 2 of the fair value hierarchy of liabilities held at the end of the reporting period. [Refer: Level 1 of fair value hierarchy [member]; Level 2 of fair value hierarchy [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2021-01-01 -Paragraph 93 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2021-en-r&anchor=para_93_c&doctype=Standard -URIDate 2021-03-24 + Details
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