XML 41 R18.htm IDEA: XBRL DOCUMENT v3.20.2
Property, Plant, and Equipment
 9 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure Property, Plant and EquipmentIn the second quarter of 2020, we received approval from MISO to retire the R.M. Schahfer Generating Station in 2023. As a result of this approval, we have reclassified $903.8 million in net book value of certain plant and equipment for the R.M. Schahfer Generating Station from “Net utility plant” to “Other Property, at cost, less accumulated depreciation” on the Condensed Consolidated Balance Sheets (unaudited). The amount of plant and equipment reclassified to other property is based on current estimates of the plant and equipment that will not be utilized at retirement. As more information about plant and equipment that can be utilized beyond 2023 becomes available, additional amounts may be reclassified to other property. Depreciation expense will continue to be recorded at the composite depreciation rate approved by the IURC. See Note 18-D, "Other Matters," for additional information.