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Risk Management Activities - Netting Arrangements (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Current risk management liabilities |  |
Disclosure of financial liabilities [abstract] |  |
Gross amounts of recognized financial liabilities | $ (504) | $ (1,953)
Amounts set off | 355 | 883
Net amounts included on the statement of financial position | (149) | (1,070)
Master netting arrangements | 7 | 62
Net amount | (142) | (1,008)
Long-term risk management liabilities |  |
Disclosure of financial liabilities [abstract] |  |
Gross amounts of recognized financial liabilities | (145) | (449)
Amounts set off | 91 | 43
Net amounts included on the statement of financial position | (54) | (406)
Master netting arrangements | 2 | 7
Net amount | (52) | (399)
Accounts payable and accrued liabilities |  |
Disclosure of financial liabilities [abstract] |  |
Gross amounts of recognized financial liabilities | (760) | (1,344)
Amounts set off | 646 | 934
Net amounts included on the statement of financial position | (114) | (410)
Master netting arrangements | 11 | 176
Net amount | (103) | (234)
Current risk management assets |  |
Disclosure of financial assets [abstract] |  |
Gross amounts of recognized financial assets | 528 | 1,602
Amounts set off | (355) | (883)
Net amounts included on the statement of financial position | 173 | 719
Master netting arrangements | (7) | (62)
Net amount | 166 | 657
Long-term risk management assets |  |
Disclosure of financial assets [abstract] |  |
Gross amounts of recognized financial assets | 161 | 204
Amounts set off | (91) | (43)
Net amounts included on the statement of financial position | 70 | 161
Master netting arrangements | (2) | (7)
Net amount | 68 | 154
Trade and other receivables |  |
Disclosure of financial assets [abstract] |  |
Gross amounts of recognized financial assets | 789 | 1,330
Amounts set off | (646) | (934)
Net amounts included on the statement of financial position | 143 | 396
Master netting arrangements | (11) | (176)
Net amount | $ 132 | $ 220

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