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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Level 3 Inputs (Details) $ in Millions | Mar. 31, 2023 CAD ($) $ / MWh $ / bbl $ / MillionsofBTU-MMBTU | Dec. 31, 2022 CAD ($)
--- | --- | ---
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (561) | $ (546)
Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | (561) | (546)
Level 3 |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | (148) |
Level 3 | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | (148) | $ (136)
Market approach valuation technique | Level 3 | Commodity contracts - financial | Natural gas | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (34) |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 2.30 |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 10.29 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Natural gas | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 4.60 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Crude | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (12) |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Crude | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 72.61 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Crude | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 104.87 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Crude | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 92.25 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Power | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (92) |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 25.07 |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 214.37 |
Market approach valuation technique | Level 3 | Commodity contracts - financial | Power | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 70.68 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Natural gas | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (34) |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 0.60 |
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 ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 8.14 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Natural gas | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MillionsofBTU-MMBTU | 3.51 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Crude | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ (9) |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Crude | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 74.97 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Crude | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 116.60 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Crude | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / bbl | 91.05 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Power | Fair Value |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Fair Value | $ 33 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Power | Minimum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 13.30 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Power | Maximum |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 107.36 |
Market approach valuation technique | Level 3 | Commodity contracts - physical | Power | Weighted Average |  |
Significant unobservable inputs used in the fair value measurement of Level 3 derivative instruments |  |
Forward price ($ / mmbtu, barrel, gallon, MW/H) | $ / MWh | 55.46 |

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