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provisions (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
provisions reconciliation |  |
Balance as at beginning of period | $ 1,061 | $ 704
Additions | 615 | 1,101
Reversals | (169) | (88)
Uses | (589) | (700)
Interest effects | (13) | 53
Effects of foreign exchange, net | 17 | (9)
Balance as at end of period | 922 | 1,061
Current | 236 |
Non-current | 686 |
Total | 922 | 1,061
Asset retirement obligations |  |
provisions reconciliation |  |
Balance as at beginning of period | 378 | 316
Additions | 40 | 36
Uses | (13) | (10)
Interest effects | (27) | 36
Balance as at end of period | 378 | 378
Current | 25 |
Non-current | 353 |
Total | 378 | 378
Differences of interest effect due to change in discount rates as compared to interest accretion on provisions | (42) | 23
Employee-related |  |
provisions reconciliation |  |
Balance as at beginning of period | 219 | 84
Additions | 312 | 547
Reversals | (7) | (12)
Uses | (391) | (400)
Balance as at end of period | 133 | 219
Current | 126 |
Non-current | 7 |
Total | 133 | 219
Written put options and contingent consideration |  |
provisions reconciliation |  |
Balance as at beginning of period | 276 | 157
Additions | 9 | 288
Reversals | (106) | (68)
Uses |  | (110)
Interest effects | 14 | 17
Effects of foreign exchange, net | 17 | (8)
Balance as at end of period | 210 | 276
Current | 5 |
Non-current | 205 |
Total | 210 | 276
Other |  |
provisions reconciliation |  |
Balance as at beginning of period | 188 | 147
Additions | 254 | 230
Reversals | (56) | (8)
Uses | (185) | (180)
Effects of foreign exchange, net |  | (1)
Balance as at end of period | 201 | 188
Current | 80 |
Non-current | 121 |
Total | 201 | $ 188
Other reversals rationalization of real estate amounts | $ 37 |

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- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount recognised for new other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_a&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_c&doctype=Standard -URIDate 2024-03-27 + Details
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- References No definition available. + Details
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- Definition The amount reversed for unused other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in other provisions resulting from interest effect. + References No definition available. + Details
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- Definition The difference between the interest effect on other provisions and the interest accretion on provisions included in financing costs due to the change in the discount rates applicable to the provision. + References No definition available. + Details
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- Definition The amount of current provisions other than provisions for employee benefits. + References No definition available. + Details
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- Definition The amount of non-current provisions other than provisions for employee benefits. + References No definition available. + Details
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- Definition The amount recognized for Other reversals in respect for lease rationalization of real estate. + References No definition available. + Details
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