Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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PROPERTY, PLANT, AND EQUIPMENT - PUBLIC SERVICE BUILDING (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, plant, and equipment
Insurance proceeds received	$ 0.0	$ 22.2
WE \| Public Service Building
Property, plant, and equipment
Costs incurred for repairs and restorations	93.5
Insurance proceeds received			$ 20.0
Receivable for future insurance recoveries	$ 61.0
Costs included in other operation and maintenance			$ 12.5