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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Disclosure of analysis of other comprehensive income by item [line items] |  |
Balances, beginning of year | $ 3,212.8 | $ 2,578.3
Other comprehensive (loss) income | (13.2) | (140.1)
Balances, end of year | 4,086.6 | 3,212.8
Foreign currency exchange differences on translation of foreign operations |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Balances, beginning of year | 64.5 | 225.9
Other comprehensive (loss) income | (93.9) | (161.4)
Balances, end of year | (29.4) | 64.5
Net change in cash flow hedges |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Balances, beginning of year | (5.2) | (33.3)
Other comprehensive (loss) income | 4.7 | 28.1
Balances, end of year | (0.5) | (5.2)
Net changes in financial assets carried at FVOCI |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Balances, beginning of year | (1.2) | 0.6
Other comprehensive (loss) income | (0.1) | (1.8)
Balances, end of year | (1.3) | (1.2)
Accumulated other comprehensive income |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Balances, beginning of year | 58.1 | 193.2
Other comprehensive (loss) income | (104.1) | (135.1)
Other comprehensive loss (income) excluding cash flow hedges | (89.3) | (135.1)
Balances, end of year | $ (31.2) | $ 58.1

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