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ACQUISITIONS & DIVESTITURES - HNT Tools Business Divestiture (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 14, 2018
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Business Acquisition [Line Items]          
Transitional services, period (up to) 18 months        
Income from divestiture   $ 0.1 $ 0.3 $ 0.1 $ 1.2
HNT Tools Business | Disposed of by Sale          
Business Acquisition [Line Items]          
Contingent consideration related to the divestiture, measurement period 2 years        
Change in fair value contingent consideration in other expense         $ 0.5
HNT Tools Business | Disposed of by Sale | Maximum          
Business Acquisition [Line Items]          
Contingent consideration related to the divestiture $ 4.0