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Capital Stock - Schedule of Share-based Compensation Expense, by Expense Category (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total share-based compensation expense | $ 7.4 | $ 5.2
Continuing Operations |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total share-based compensation expense | 7.4 | 5.2
Other operating expense | Continuing Operations |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total share-based compensation expense | 0.9 | 0.8
General and administration | Continuing Operations |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total share-based compensation expense | 4.3 | 4.4
Restructuring and other | Continuing Operations |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total share-based compensation expense | $ 2.2 | $ 0.0

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors, certain consultants qualifying for treatment as employees, including the impact of compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. 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