REVENUE RECOGNITION Revenue Recognition Narrative (Details) - Helicopter Service Contracts [Member]	6 Months Ended
	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue Recognition, Period of Service	30 days
Low
Disaggregation of Revenue [Line Items]
Revenue Recognition, Invoicing Payment Due Period	30 days
High
Disaggregation of Revenue [Line Items]
Revenue Recognition, Invoicing Payment Due Period	60 days