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REVENUE RECOGNITION (Narrative) (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Apr. 30, 2021
Jun. 30, 2020
Apr. 30, 2020
POM        
Disaggregation of Revenue [Line Items]        
Deferred revenue $ 172.8      
Current deferred revenue 101.6      
TIS        
Disaggregation of Revenue [Line Items]        
Current deferred revenue $ 28.3 $ 28.9 $ 28.8 $ 30.8