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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]      
Tax benefit on unrealized loss on cash flow hedges $ 0.0 $ 0.3 $ 0.1