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INCOME TAXES (Tables)
12 Months Ended
Mar. 31, 2021
Income Tax [Abstract]  
Effective Income Tax Rate Reconciliation
The reconciliation of income taxes at Canadian statutory rates with the reported income taxes is as follows:
20212020
(Loss) earnings before income taxes$(87.2)$392.7 
Canadian statutory income tax rates26.53 %26.64 %
Income taxes at Canadian statutory rates$(23.1)$104.6 
Effect of differences in tax rates in other jurisdictions(5.8)(19.9)
Unrecognized tax benefits and tax benefits not previously recognized3.2 3.4 
Non-taxable revenues(4.8)(6.2)
Tax impact on after-tax profit of equity accounted investees(1.1)(6.1)
Prior years' tax adjustments(6.3)(4.9)
Other(1.8)2.9 
Income tax (recovery) expense$(39.7)73.8 
Schedule of Components of Income Tax Expense (Benefit)
Significant components of the provision for the income tax expense are as follows:
20212020
Current income tax (recovery) expense:  
Current year$8.6 $65.1 
Prior years' tax adjustments(15.0)5.8 
Deferred income tax (recovery) expense:
Tax benefit not previously recognized used to reduce the deferred tax expense(5.2)(2.8)
Change in income tax rates(0.8)(1.0)
Origination and reversal of temporary differences(27.3)6.7 
Income tax (recovery) expense$(39.7)$73.8 
Disclosure of temporary difference, unused tax losses and unused tax credits
During the year ended March 31, 2021, movements in temporary differences are as follows:
Foreign
Balancecurrency 
beginningRecognizedRecognized
Recognized
Business exchangeBalance
of yearin income in OCIin equitycombinationsdifferencesend of year
Non-capital loss carryforwards$33.4 $12.0 $— $— $2.4 $0.3 $48.1 
Unclaimed research & development expenditures64.4 5.8 — — 0.6 — 70.8 
Capital loss carryforwards1.4 (0.3)— — — — 1.1 
Investment tax credits(70.0)(6.4)— — — — (76.4)
Property, plant and equipment and right-of-use of assets(88.4)(5.8)— — 6.9 12.1 (75.2)
Intangible assets(93.0)9.0 — — (11.5)3.0 (92.5)
Deferred revenues, contract assets and contract liabilities(15.9)6.4 — — 11.2 (0.2)1.5 
Foreign currency exchange difference(2.3)2.7 (1.6)— — (0.2)(1.4)
Derivative financial assets and liabilities25.5 (18.9)(13.0)— — (0.1)(6.5)
Defined benefit obligation53.1 4.5 (0.3)— — (0.1)57.2 
Amounts not currently deductible42.7 33.2 — — (8.9)(2.0)65.0 
Other(17.0)(8.9)— 15.7 — (0.1)(10.3)
Net deferred income tax (liabilities) assets $(66.1)$33.3 $(14.9)$15.7 $0.7 $12.7 $(18.6)

During the year ended March 31, 2020, movements in temporary differences are as follows:
          
Foreign
Balancecurrency 
beginningRecognizedRecognizedBusinessexchangeBalance
of yearin income in OCIcombinationsdifferencesend of year
Non-capital loss carryforwards$35.2 $(1.2)$— $— $(0.6)$33.4 
Unclaimed research & development expenditures45.1 19.3 — — — 64.4 
Capital loss carryforwards0.7 0.7 — — — 1.4 
Investment tax credits(74.1)4.1 — — — (70.0)
Property, plant and equipment and right-of-use of assets(67.4)(11.2)— (3.1)(6.7)(88.4)
Intangible assets(87.4)(1.9)— (2.9)(0.8)(93.0)
Deferred revenues, contract assets and contract liabilities2.0 (18.9)— — 1.0 (15.9)
Foreign currency exchange difference(13.9)(2.1)13.3 — 0.4 (2.3)
Derivative financial assets and liabilities0.2 15.6 9.7 — — 25.5 
Defined benefit obligation55.4 0.1 (3.6)— 1.2 53.1 
Amounts not currently deductible41.6 1.5 — (0.6)0.2 42.7 
Other(7.6)(8.9)— — (0.5)(17.0)
Net deferred income tax (liabilities) assets $(70.2)$(2.9)$19.4 $(6.6)$(5.8)$(66.1)
The non-capital losses incurred in various jurisdictions expire as follows:
Expiry date UnrecognizedRecognized
2022 - 2026$72.3 $7.2 
2027 - 204051.7 68.2 
No expiry date64.7 113.2 
 $188.7 $188.6