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PROPERTY, PLANT AND EQUIPMENT - Summaries of Property, Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | $ 2,154.0 | $ 1,943.3
Additions | 107.6 | 290.6
Acquisition through business combinations | 8.5 | 0.8
Disposals | (4.0) | (0.7)
Depreciation | (154.8) | (145.6)
Impairment | (76.7) | (1.8)
Transfers and others | 86.1 | 13.0
Foreign currency exchange differences | (151.3) | 54.4
Property, plant and equipment, end | 1,969.4 | 2,154.0
Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 3,167.6 |
Property, plant and equipment, end | 3,079.0 | 3,167.6
Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | (1,013.6) |
Property, plant and equipment, end | (1,109.6) | (1,013.6)
Buildings and land |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 262.8 | 241.7
Additions | 16.2 | 31.0
Acquisition through business combinations | 0.3 | 0.1
Disposals | 0.0 | (0.1)
Depreciation | (19.8) | (17.7)
Impairment | 0.0 | 0.0
Transfers and others | 36.1 | 2.2
Foreign currency exchange differences | (13.5) | 5.6
Property, plant and equipment, end | 282.1 | 262.8
Buildings and land | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 490.0 |
Property, plant and equipment, end | 513.8 | 490.0
Buildings and land | Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | (227.2) |
Property, plant and equipment, end | (231.7) | (227.2)
Simulators |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 1,569.3 | 1,450.3
Additions | 13.4 | 27.3
Acquisition through business combinations | 7.9 | 0.0
Disposals | (1.9) | (0.5)
Depreciation | (113.3) | (105.0)
Impairment | (76.7) | (1.8)
Transfers and others | 145.3 | 155.0
Foreign currency exchange differences | (120.9) | 44.0
Property, plant and equipment, end | 1,423.1 | 1,569.3
Simulators | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 2,191.1 |
Property, plant and equipment, end | 2,140.6 | 2,191.1
Simulators | Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | (621.8) |
Property, plant and equipment, end | (717.5) | (621.8)
Machinery and equipment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 51.4 | 51.5
Additions | 13.4 | 13.9
Acquisition through business combinations | 0.3 | 0.1
Disposals | (0.1) | 0.0
Depreciation | (15.9) | (17.9)
Impairment | 0.0 | 0.0
Transfers and others | 1.4 | 2.8
Foreign currency exchange differences | (2.2) | 1.0
Property, plant and equipment, end | 48.3 | 51.4
Machinery and equipment | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 203.1 |
Property, plant and equipment, end | 192.9 | 203.1
Machinery and equipment | Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | (151.7) |
Property, plant and equipment, end | (144.6) | (151.7)
Aircraft |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 69.3 | 54.8
Additions | 19.1 | 11.3
Acquisition through business combinations | 0.0 | 0.6
Disposals | (0.4) | (0.1)
Depreciation | (5.8) | (5.0)
Impairment | 0.0 | 0.0
Transfers and others | 0.6 | 4.6
Foreign currency exchange differences | (6.7) | 3.1
Property, plant and equipment, end | 76.1 | 69.3
Aircraft | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 82.2 |
Property, plant and equipment, end | 91.9 | 82.2
Aircraft | Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | (12.9) |
Property, plant and equipment, end | (15.8) | (12.9)
Assets under construction |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 201.2 | 145.0
Additions | 45.5 | 207.1
Acquisition through business combinations | 0.0 | 0.0
Disposals | (1.6) | 0.0
Depreciation | 0.0 | 0.0
Impairment | 0.0 | 0.0
Transfers and others | (97.3) | (151.6)
Foreign currency exchange differences | (8.0) | 0.7
Property, plant and equipment, end | 139.8 | 201.2
Assets under construction | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 201.2 |
Property, plant and equipment, end | 139.8 | 201.2
Assets under construction | Accumulated depreciation and impairment |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment, start | 0.0 |
Property, plant and equipment, end | $ 0.0 | $ 0.0

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- Definition The increase in property, plant and equipment resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_75_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_a&doctype=Standard -URIDate 2020-01-01 + Details
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