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ASSET IMPAIRMENT (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2021 CAD ($) $ / bbl bbl / d $ / bbl $ / $ | Sep. 30, 2021 CAD ($) $ / bbl bbl / d | Dec. 31, 2020 CAD ($) bbl / d $ / bbl $ / bbl item $ / $ | Mar. 31, 2020 CAD ($) $ / shares $ / bbl $ / shares bbl / d item $ / $ | Jun. 30, 2021
Fort Hills CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Recoverable amount of CGU |  |  | $ 5,700 | $ 6,400 |
Reversal of impairment loss |  |  | $ 0 |  |
Fort Hills CGU | Sensitivity analysis, increase in price |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible increase in unobservable input (as a percent) |  |  | 5.00% |  |
Increase to (reversal of) impairment charge, due to increase in unobservable input |  |  | $ (1,000) |  |
Fort Hills CGU | Sensitivity analysis, decrease in price |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible decrease in unobservable input (as a percent) |  |  |  | 5.00% |
Increase to (reversal of) impairment charge, due to decrease in unobservable input |  |  |  | $ 1,100 |
Fort Hills CGU | Sensitivity analysis increase In discount rate |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible increase in unobservable input (as a percent) |  |  |  | 1.00% |
Increase to (reversal of) impairment charge, due to increase in unobservable input |  |  |  | $ 1,100 |
Fort Hills CGU | Sensitivity analysis, decrease in discount rate |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible decrease in unobservable input (as a percent) |  |  | 1.00% |  |
Increase to (reversal of) impairment charge, due to decrease in unobservable input |  |  | $ (900) |  |
Terra Nova CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Ownership interest (as percent) |  | 48.00% |  |  | 38.00%
Consideration received, net of tax |  | $ 26 |  |  |
Tax effect of consideration received |  | $ 8 |  |  |
Additional interest acquired (as a percent) |  | 10.00% |  |  |
Recoverable amount of CGU |  | $ 177 |  | 24 |
White Rose CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Recoverable amount of CGU |  |  |  | $ 185 |
White Rose CGU | Sensitivity analysis, decrease in price |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible decrease in unobservable input (as a percent) |  |  |  | 5.00% |
Increase to (reversal of) impairment charge, due to decrease in unobservable input |  |  |  | $ 83 |
White Rose CGU | Sensitivity analysis increase In discount rate |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible increase in unobservable input (as a percent) |  |  |  | 1.00% |
Increase to (reversal of) impairment charge, due to increase in unobservable input |  |  |  | $ 45 |
White Rose CGU | WWR Project |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment loss, net of tax |  |  | 423 |  |
Tax effect of impairment loss |  |  | $ 136 |  |
Oil Sands | Fort Hills CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, foreign exchange rate | $ / $ | 0.80 |  |  |  |
Impairment testing assumption, risk-adjusted discount rate, after tax | 7.50% |  | 7.50% |  |
Recoverable amount of CGU | $ 5,500 |  |  |  |
Impairment loss, net of tax | $ 0 |  |  |  |
Oil Sands | Fort Hills CGU | Minimum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d | 94,000 |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / bbl | 22.00 |  |  |  |
Oil Sands | Fort Hills CGU | Maximum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d | 111,000 |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / bbl | 23.00 |  |  |  |
Oil Sands | Fort Hills CGU | Forecast for 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, foreign exchange rate | $ / $ |  |  | 0.76 |  |
Oil Sands | Fort Hills CGU | Forecast after 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, foreign exchange rate | $ / $ |  |  | 0.80 |  |
Oil Sands | Fort Hills CGU | Forecast through 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  | 74,000 |  |
Impairment testing assumption, average cash operating costs per bbl | $ / bbl |  |  | 25.50 |  |
Impairment testing assumption, number of extraction trains | item |  |  | 2 |  |
Oil Sands | Fort Hills CGU | Forecast after 2022 | Minimum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  | 97,000 |  |
Impairment testing assumption, average cash operating costs per bbl | $ / bbl |  |  | 19.00 |  |
Oil Sands | Fort Hills CGU | Forecast after 2022 | Maximum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  | 105,000 |  |
Impairment testing assumption, average cash operating costs per bbl | $ / bbl |  |  | 23.00 |  |
Oil Sands | Fort Hills CGU | Sensitivity analysis, decrease in price |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible decrease in unobservable input (as a percent) | 5.00% |  |  |  |
Impairment loss, net of tax | $ 1,000 |  |  |  |
Oil Sands | Fort Hills CGU | Sensitivity analysis increase In discount rate |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reasonably possible increase in unobservable input (as a percent) | 1.00% |  |  |  |
Impairment loss, net of tax | $ 500 |  |  |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  | 32.00 |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl | 55.00 |  | 41.15 |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2023 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl | 54.57 |  | 47.50 |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2024 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  | 49.50 |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2024 to 2031 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl | 50.86 |  |  |  |
Impairment testing assumption, price per barrel escalation percentage | 2.00% |  |  |  |
Oil Sands | Fort Hills CGU | Western Canadian Select crude oil | Forecast for 2025 to 2064 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel escalation percentage |  |  | 2.00% |  |
Oil Sands | Fort Hills CGU | Fort Hills Project |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, foreign exchange rate | $ / $ |  |  |  | 0.76 |
Impairment testing assumption, risk-adjusted discount rate, after tax |  |  |  | 7.50% |
Impairment loss, net of tax |  |  |  | $ 1,380 |
Tax effect of impairment loss |  |  |  | $ 440 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast for remainder of 2020 and 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  |  | 47,000 |
Impairment testing assumption, number of extraction trains | item |  |  |  | 1 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast for remainder of 2020 and 2021 | Minimum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / shares |  |  |  | 32.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast for remainder of 2020 and 2021 | Maximum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / shares |  |  |  | 37.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast after 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, number of extraction trains | item |  |  |  | 2 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast after 2021 | Minimum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / shares |  |  |  | 22.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast after 2021 | Maximum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, average cash operating costs per bbl | $ / shares |  |  |  | 24.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, number of extraction trains | item |  |  |  | 2 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast after 2022 | Minimum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  |  | 96,000 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Forecast after 2022 | Maximum |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  |  | 106,000 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for remainder of 2020 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 9.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 13.60 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 32.00 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for 2023 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 51.55 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for 2024 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 52.90 |
Oil Sands | Fort Hills CGU | Fort Hills Project | Western Canadian Select crude oil | Forecast for 2025 through 2061 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel escalation percentage |  |  |  | 2.00% |
Exploration and Production | Terra Nova CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Reversal of impairment loss, net of tax |  | 168 |  |  |
Tax effect of the reversal of impairment loss |  | $ 53 |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  |  | 6,200 |
Impairment testing assumption, risk-adjusted discount rate, after tax |  | 9.00% |  | 9.00% |
Impairment loss, net of tax |  |  |  | $ 285 |
Tax effect of impairment loss |  |  |  | $ 93 |
Exploration and Production | Terra Nova CGU | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  | 6,000 |  |  |
Impairment testing assumption, percentage of working interest |  | 38.00% |  |  |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for remainder of 2020 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 30.00 |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 35.00 |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / shares |  |  |  | 50.00 |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2023 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel |  | 65.00 |  | 69.00 |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2024 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  | 68.00 |  |  |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2024 to 2031 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel escalation percentage |  |  |  | 2.00% |
Exploration and Production | Terra Nova CGU | Brent crude oil | Forecast for 2025 to 2033 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel escalation percentage |  | 2.00% |  |  |
Exploration and Production | White Rose CGU |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of future capital expenditure |  |  |  | $ 1,435 |
Impairment testing assumption, risk-adjusted discount rate, after tax |  |  |  | 9.00% |
Impairment loss, net of tax |  |  |  | $ 137 |
Tax effect of impairment loss |  |  |  | $ 45 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d |  |  |  | 9,800 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast for remainder of 2020 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 30.00 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast for 2021 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / bbl |  |  |  | 35.00 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast for 2022 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / shares |  |  |  | 50.00 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast for 2023 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel | $ / shares |  |  |  | 69.00 |
Exploration and Production | White Rose CGU | Brent crude oil | Forecast for 2024 to 2036 |  |  |  |  |
ASSET IMPAIRMENT |  |  |  |  |
Impairment testing assumption, price per barrel escalation percentage |  |  |  | 2.00% |

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