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Additional Financial Information - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Cash and cash equivalents $ 17.8 $ 23.0
Cash in assets of discontinued operations — current 0.0 14.0
Total cash, cash equivalents and cash in assets of discontinued operations $ 17.8 $ 37.0