DERIVATIVE INSTRUMENTS Schedule of Energy Generation Amounts (Details) MW in Millions	Mar. 31, 2019 MW
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3.0
Fiscal Year 2019 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	2.0
Fiscal Year 2020 [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	1.0

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

Name:	invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant