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LONG-TERM DEBT	6 Months Ended
LONG-TERM DEBT	Jun. 30, 2021
Long-term Debt, Unclassified [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT Wisconsin Electric Power Company In June 2021, we issued $300.0 million of 1.70% Debentures due June 15, 2028, and used the net proceeds to redeem all $300.0 million outstanding of our 2.95% Debentures due September 15, 2021 at par. WEPCo Environmental Trust Finance I, LLC In May 2021, WEPCo Environmental Trust, a special purpose entity we formed, issued $118.8 million of 1.578% ETBs due December 15, 2035, and used the net proceeds to purchase environmental control property from us. Principal and interest will be paid semiannually, beginning December 15, 2021, and the ETBs are expected to be fully repaid by December 15, 2033. For additional information, see Note 16, Variable Interest Entities – WEPCo Environmental Trust Finance I, LLC.