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INCOME TAXES - Deferred income taxes (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | $ (3,437) | $ (2,910)
Effect of IFRS 16 adoption |  | 9
(Expense) recovery in net income | 132 | (443)
Recovery in other comprehensive income | 122 | (93)
Acquisitions | (13) |
Deferred tax assets (liabilities), end of period | (3,196) | (3,437)
Property, plant and equipment and inventory |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (1,366) | (1,145)
Effect of IFRS 16 adoption |  | 0
(Expense) recovery in net income | (108) | (221)
Recovery in other comprehensive income | 0 | 0
Acquisitions | (10) |
Deferred tax assets (liabilities), end of period | (1,484) | (1,366)
Goodwill and other intangibles |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (1,318) | (1,192)
Effect of IFRS 16 adoption |  | 0
(Expense) recovery in net income | (129) | (126)
Recovery in other comprehensive income | 0 | 0
Acquisitions | (3) |
Deferred tax assets (liabilities), end of period | (1,450) | (1,318)
Investments |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (168) | (66)
Effect of IFRS 16 adoption |  | 0
(Expense) recovery in net income | (2) | 2
Recovery in other comprehensive income | 40 | (104)
Acquisitions | 0 |
Deferred tax assets (liabilities), end of period | (130) | (168)
Non-capital loss carryforwards |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | 12 | 29
Effect of IFRS 16 adoption |  | 0
(Expense) recovery in net income | 4 | (17)
Recovery in other comprehensive income | 0 | 0
Acquisitions | 0 |
Deferred tax assets (liabilities), end of period | 16 | 12
Contract and deferred commission cost assets |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (570) | (515)
Effect of IFRS 16 adoption |  | 0
(Expense) recovery in net income | 387 | (55)
Recovery in other comprehensive income | 0 | 0
Acquisitions | 0 |
Deferred tax assets (liabilities), end of period | (183) | (570)
Other |  |
Movement of net deferred tax assets and liabilities |  |
Deferred tax assets (liabilities), beginning of period | (27) | (21)
Effect of IFRS 16 adoption |  | 9
(Expense) recovery in net income | (20) | (26)
Recovery in other comprehensive income | 82 | 11
Acquisitions | 0 |
Deferred tax assets (liabilities), end of period | $ 35 | $ (27)

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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 2020-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2020-01-01 + Details
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