REGULATORY ENVIRONMENT - WI LIQUEFIED NATURAL GAS FACILITIES (Details) - Subsequent event - Public Service Commission of Wisconsin (PSCW) - Liquefied Natural Gas Facilities $ in Millions	Nov. 01, 2019 USD ($) Bcf
Public Utilities, General Disclosures [Line Items]
Entity's estimated project costs | $	$ 370
WE
Public Utilities, General Disclosures [Line Items]
Natural gas supply	1.0
WG
Public Utilities, General Disclosures [Line Items]
Natural gas supply	1.0