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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - LEVEL 3 DERIVATIVE INSTRUMENTS (Details) CAD in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 CAD CAD / bbl CAD / MMBTU CAD / gal CAD / MWh | Dec. 31, 2014 CAD
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD (4,748) | CAD (2,364)
Level 3 |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | 54 | CAD 149
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD (2) |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 2.89 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 4.26 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Natural gas | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 3.53 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | NGL |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD 8 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | NGL | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 0.21 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | NGL | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 1.28 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | NGL | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 0.87 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD (148) |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MWh | 30.00 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MWh | 73.76 |
Market approach valuation technique | Level 3 | Commodity Contracts - Financial | Power | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MWh | 53.44 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD (69) |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 2.04 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 5.69 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Natural gas | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / MMBTU | 3.14 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD 132 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / bbl | 28.59 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / bbl | 87.40 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | Crude oil | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / bbl | 51.71 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD 3 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 0.21 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 1.67 |
Market approach valuation technique | Level 3 | Commodity Contracts - Physical | NGL | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price | CAD / gal | 0.74 |
Option model valuation technique | Level 3 | Commodity Options | Crude oil |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD 51 |
Option model valuation technique | Level 3 | Commodity Options | Crude oil | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 26.00% |
Option model valuation technique | Level 3 | Commodity Options | Crude oil | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 37.00% |
Option model valuation technique | Level 3 | Commodity Options | Crude oil | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 32.00% |
Option model valuation technique | Level 3 | Commodity Options | NGL |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair value | CAD 79 |
Option model valuation technique | Level 3 | Commodity Options | NGL | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 13.00% |
Option model valuation technique | Level 3 | Commodity Options | NGL | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 74.00% |
Option model valuation technique | Level 3 | Commodity Options | NGL | Weighted average price |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Option Volatility (as a percent) | 34.00% |

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