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SOFTWARE: (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Software      
Amortization expense $ 15.9 $ 23.9 $ 18.6
Developed technology (Software, net)      
Software      
Amortization expense 8.4 15.7 13.9
LiveRamp, Inc. | Arbor and Circulate | Developed technology (Software, net)      
Software      
Amortization expense $ 6.2 $ 13.8 $ 11.8