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]
Natural gas supply \| Bcf	1.0
Entity's estimated project costs \| $	$ 185

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