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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - FAIR VALUE OF DERIVATIVES (Details) - CAD CAD in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value of Derivatives |  |
Total net financial asset/(liability) | CAD (4,748) | CAD (2,364)
Foreign Exchange Risk |  |
Fair Value of Derivatives |  |
Total net financial asset/(liability) | (3,782) | (1,433)
Interest rate contracts |  |
Fair Value of Derivatives |  |
Total net financial asset/(liability) | (1,173) | (1,001)
Commodity contracts |  |
Fair Value of Derivatives |  |
Total net financial asset/(liability) | 228 | 50
Other contracts |  |
Fair Value of Derivatives |  |
Total net financial asset/(liability) | (21) | 20
Total Gross Derivative Instruments |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 791 | 568
Long-term derivative assets, Total Gross Derivative Instruments | 373 | 199
Current derivative liabilities, Total Gross Derivative Instruments | (1,945) | (1,020)
Long-term derivative liabilities, Total Gross Derivative Instruments | (3,950) | (2,078)
Total net financial asset/(liability) | (4,731) | (2,331)
Total Gross Derivative Instruments | Foreign Exchange Risk |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 10 | 13
Long-term derivative assets, Total Gross Derivative Instruments | 128 | 51
Current derivative liabilities, Total Gross Derivative Instruments | (872) | (301)
Long-term derivative liabilities, Total Gross Derivative Instruments | (3,048) | (1,196)
Total net financial asset/(liability) | (3,782) | (1,433)
Total Gross Derivative Instruments | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 2 | 8
Long-term derivative assets, Total Gross Derivative Instruments | 18 | 5
Current derivative liabilities, Total Gross Derivative Instruments | (564) | (438)
Long-term derivative liabilities, Total Gross Derivative Instruments | (629) | (576)
Total net financial asset/(liability) | (1,173) | (1,001)
Total Gross Derivative Instruments | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 779 | 535
Long-term derivative assets, Total Gross Derivative Instruments | 227 | 135
Current derivative liabilities, Total Gross Derivative Instruments | (501) | (281)
Long-term derivative liabilities, Total Gross Derivative Instruments | (260) | (306)
Total net financial asset/(liability) | 245 | 83
Total Gross Derivative Instruments | Other contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments |  | 12
Long-term derivative assets, Total Gross Derivative Instruments |  | 8
Current derivative liabilities, Total Gross Derivative Instruments | (8) |
Long-term derivative liabilities, Total Gross Derivative Instruments | (13) |
Total net financial asset/(liability) | (21) | 20
Level 1 |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 14 | 62
Current derivative liabilities, Total Gross Derivative Instruments | (3) | (28)
Total net financial asset/(liability) | 11 | 34
Level 1 | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 14 | 62
Current derivative liabilities, Total Gross Derivative Instruments | (3) | (28)
Total net financial asset/(liability) | 11 | 34
Level 2 |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 222 | 173
Long-term derivative assets, Total Gross Derivative Instruments | 267 | 86
Current derivative liabilities, Total Gross Derivative Instruments | (1,574) | (876)
Long-term derivative liabilities, Total Gross Derivative Instruments | (3,711) | (1,897)
Total net financial asset/(liability) | (4,796) | (2,514)
Level 2 | Foreign Exchange Risk |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 10 | 13
Long-term derivative assets, Total Gross Derivative Instruments | 128 | 51
Current derivative liabilities, Total Gross Derivative Instruments | (872) | (301)
Long-term derivative liabilities, Total Gross Derivative Instruments | (3,048) | (1,196)
Total net financial asset/(liability) | (3,782) | (1,433)
Level 2 | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 2 | 8
Long-term derivative assets, Total Gross Derivative Instruments | 18 | 5
Current derivative liabilities, Total Gross Derivative Instruments | (564) | (438)
Long-term derivative liabilities, Total Gross Derivative Instruments | (629) | (576)
Total net financial asset/(liability) | (1,173) | (1,001)
Level 2 | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 210 | 140
Long-term derivative assets, Total Gross Derivative Instruments | 121 | 22
Current derivative liabilities, Total Gross Derivative Instruments | (130) | (137)
Long-term derivative liabilities, Total Gross Derivative Instruments | (21) | (125)
Total net financial asset/(liability) | 180 | (100)
Level 2 | Other contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments |  | 12
Long-term derivative assets, Total Gross Derivative Instruments |  | 8
Current derivative liabilities, Total Gross Derivative Instruments | (8) |
Long-term derivative liabilities, Total Gross Derivative Instruments | (13) |
Total net financial asset/(liability) | (21) | 20
Level 3 |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 555 | 333
Long-term derivative assets, Total Gross Derivative Instruments | 106 | 113
Current derivative liabilities, Total Gross Derivative Instruments | (368) | (116)
Long-term derivative liabilities, Total Gross Derivative Instruments | (239) | (181)
Total net financial asset/(liability) | 54 | 149
Level 3 | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets, Total Gross Derivative Instruments | 555 | 333
Long-term derivative assets, Total Gross Derivative Instruments | 106 | 113
Current derivative liabilities, Total Gross Derivative Instruments | (368) | (116)
Long-term derivative liabilities, Total Gross Derivative Instruments | (239) | (181)
Total net financial asset/(liability) | CAD 54 | CAD 149

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