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INCOME TAXES - Schedule Of Provision For Income Tax (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current |  |  |
Other taxes | $ 11 | $ 9 | $ 11
Current income tax | (164) | (618) | (261)
Deferred |  |  |
Deferred corporate income tax | 586 | (106) | 216
Deferred income tax | 640 | (241) | 231
Income tax expense (recovery) | 476 | (859) | (30)
North America |  |  |
Current |  |  |
Current corporate income tax | (145) | (377) | 86
North Sea |  |  |
Current |  |  |
Current corporate income tax | 57 | (74) | (117)
Current PRT - North Sea | (132) | (198) | (258)
Deferred |  |  |
Deferred PRT - North Sea | 54 | (135) | 15
Offshore Africa |  |  |
Current |  |  |
Current corporate income tax | $ 45 | $ 22 | $ 17

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