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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Earnings and Comprehensive Income (Details) - CAD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | $ (21) | $ 56 | $ 246 | $ (681)
Excluded components of fair value hedges | (1) | (1) | (3) | 7
Amount of (gain)/loss reclassified from AOCI to earnings | 73 | 75 | 219 | 180
Estimated gain (loss) of AOCI related to cash flow hedges reclassified to earnings in the next 12 months |  |  | $ (59) |
Maximum term of hedging exposures to variability of cash flows |  |  | 27 months |
Unrealized gain (loss) on derivatives |  |  | $ (86) | (200)
Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | (534) | 624 | (86) | (200)
Foreign exchange contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of (gain)/loss reclassified from AOCI to earnings | 1 | 1 | 4 | 3
Foreign exchange contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | (436) | 571 | 18 | (186)
Foreign exchange contracts | Non-Qualifying Derivative Instruments | Transportation and other services |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | 71 | (87)
Foreign exchange contracts | Non-Qualifying Derivative Instruments | Other income/(expense) |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | (53) | (99)
Interest rate contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of (gain)/loss reclassified from AOCI to earnings | 76 | 76 | 218 | 179
Interest rate contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | 2 | (13) | 4 | (28)
Commodity contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of (gain)/loss reclassified from AOCI to earnings | (4) | (1) | (4) | (1)
Commodity contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | (102) | 69 | (120) | 25
Commodity contracts | Non-Qualifying Derivative Instruments | Transportation and other services |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | 0 | 8
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity sales |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | (5) | (176)
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity costs |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | (124) | 195
Commodity contracts | Non-Qualifying Derivative Instruments | Operating and administrative expense |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives |  |  | 8 | (2)
Other contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of (gain)/loss reclassified from AOCI to earnings | 0 | (1) | 1 | (1)
Other contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | 2 | (3) | 12 | (11)
Cash flow hedges | Foreign exchange contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | 4 | 0 | (21) | 6
Cash flow hedges | Interest rate contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | (1) | 41 | 293 | (709)
Cash flow hedges | Commodity contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | (21) | (1) | (25) | 8
Cash flow hedges | Other contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | (2) | 0 | 2 | (6)
Fair value hedges | Foreign exchange contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Excluded components of fair value hedges | (1) | (1) | (3) | 7
Net investment hedges | Foreign exchange contracts |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | $ 0 | $ 17 | $ 0 | $ 13

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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