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INCOME TAXES - Deferred income taxes (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | $ (3,652) | $ (3,439)
(Expense) recovery in net income | (190) | (284)
Recovery in other comprehensive income | 167 | 71
Acquisitions | (2,704) | 0
Deferred tax assets (liabilities), end of period | (6,379) | (3,652)
Tax losses in foreign jurisdictions, to be paid between 2024 and 2027 | 42 |
Tax losses in foreign jurisdictions, carried forward indefinitely | 29 |
Property, plant and equipment and inventory |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (2,149) | (2,025)
(Expense) recovery in net income | (95) | (124)
Recovery in other comprehensive income | 0 | 0
Acquisitions | (1,265) | 0
Deferred tax assets (liabilities), end of period | (3,509) | (2,149)
Goodwill and other intangibles |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (1,754) | (1,578)
(Expense) recovery in net income | (89) | (175)
Recovery in other comprehensive income | 0 | 0
Acquisitions | (1,473) | (1)
Deferred tax assets (liabilities), end of period | (3,316) | (1,754)
Investments |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (89) | (135)
(Expense) recovery in net income | 35 | (1)
Recovery in other comprehensive income | 52 | 47
Acquisitions | 0 | 0
Deferred tax assets (liabilities), end of period | (2) | (89)
Lease liabilities |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | 458 | 449
(Expense) recovery in net income | 14 | 9
Recovery in other comprehensive income | 0 | 0
Acquisitions | 82 | 0
Deferred tax assets (liabilities), end of period | 554 | 458
Contract and deferred commission cost assets |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (87) | (124)
(Expense) recovery in net income | (36) | 37
Recovery in other comprehensive income | 0 | 0
Acquisitions | 0 | 0
Deferred tax assets (liabilities), end of period | (123) | (87)
Other |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (31) | (26)
(Expense) recovery in net income | (19) | (30)
Recovery in other comprehensive income | 115 | 24
Acquisitions | (48) | 1
Deferred tax assets (liabilities), end of period | $ 17 | $ (31)

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph ab -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_ab&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 90 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_90&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Deductible Temporary Differences For Which No Deferred Tax Asset Is Recognised, Carryforward Indefinitely + References No definition available. + Details
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