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PROPERTY, PLANT AND EQUIPMENT - Cost, Depreciation, Net Carrying Amount (Details) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | $ 12,167 | $ 12,198 | $ 11,780
Right-of-use assets | 1,851 | 1,736 | 0
Total | 14,018 | 13,934 | 11,780
Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 33,851 | 32,666 | 31,402
Right-of-use assets | 2,248 | 1,911 |
Total | 36,099 | 34,577 |
Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (21,684) | (20,468) | (19,622)
Right-of-use assets | (397) | (175) |
Total | (22,081) | (20,643) |
Land and buildings |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 716 | 721 | 697
Land and buildings | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 1,212 | 1,182 | 1,125
Land and buildings | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (496) | (461) | (428)
Cable and wireless network |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 8,089 | 7,964 | 7,474
Cable and wireless network | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 22,357 | 21,778 | 21,024
Cable and wireless network | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (14,268) | (13,814) | (13,550)
Computer equipment and software |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 2,108 | 2,154 | 2,209
Computer equipment and software | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 6,361 | 5,903 | 5,514
Computer equipment and software | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (4,253) | (3,749) | (3,305)
Customer premise equipment |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 461 | 576 | 629
Customer premise equipment | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 1,976 | 1,963 | 1,908
Customer premise equipment | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (1,515) | (1,387) | (1,279)
Leasehold improvements |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 312 | 315 | 289
Leasehold improvements | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 625 | 596 | 539
Leasehold improvements | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | (313) | (281) | (250)
Equipment and vehicles |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 481 | 468 | 482
Equipment and vehicles | Cost |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | 1,320 | 1,244 | 1,292
Equipment and vehicles | Accumulated depreciation |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Property, plant and equipment | $ (839) | $ (776) | $ (810)

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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_j&doctype=Standard -URIDate 2020-01-01 + Details
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