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OTHER (GAINS) AND LOSSES - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Analysis of income and expense [abstract] |  |
Cloud computing transition adjustment (Note 4) | $ 0.0 | $ 13.4

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- Definition Cloud Computing Transition Adjustment + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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