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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, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Amount of unrealized gain/(loss) recognized in OCI | $ 56 | $ (230) | $ (681) | $ (838)
Excluded components of fair value hedges | (1) | 0 | 7 | 0
Amount of (gain) loss reclassified from AOCI to earnings | 75 | 37 | 180 | 108
Estimated gain (loss) of AOCI related to cash flow hedges reclassified to earnings in the next 12 months |  |  | $ (99) |
Maximum term of hedging exposures to variability of cash flows |  |  | 39 months |
Unrealized gain (loss) on derivatives |  |  | $ (200) | 1,005
Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | 624 | (107) | (200) | 1,005
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 | 2 | 3 | 4
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 | 571 | (179) | (186) | 849
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 |  |  | (87) | 366
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 |  |  | (99) | 483
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 | 36 | 179 | 108
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 | (13) | 0 | (28) | 178
Commodity contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | 69 | 73 | 25 | (26)
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 |  |  | 8 | (15)
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 |  |  | (176) | (418)
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 |  |  | 195 | 382
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 |  |  | (2) | 25
Other 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) | (1) | (4)
Other contracts | Non-Qualifying Derivative Instruments |  |  |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |  |  |
Unrealized gain (loss) on derivatives | (3) | (1) | (11) | 4
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 | 0 | 2 | 6 | (11)
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 | 41 | (231) | (709) | (812)
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 | (1) | (1) | 8 | (22)
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 | 0 | 1 | (6) | 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) | 0 | 7 | 0
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 | $ 17 | $ (1) | $ 13 | $ 1

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