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Retirement of Generation Facilities (Tables)
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Summary of Planned Retirements of Generation Capacity
Operational results for plants with defined retirement dates are included in our Sunset segment beginning in the quarter when a retirement plan is announced and move to the Asset Closure segment at the beginning of the calendar year the retirement is expected to occur.
FacilityLocationISO/RTOFuel TypeNet Generation Capacity (MW)Actual or Expected Retirement Date (a)(b)Segment
BaldwinBaldwin, ILMISOCoal1,185By the end of 2025Sunset
Coleto CreekGoliad, TXERCOTCoal650By the end of 2027Sunset
KincaidKincaid, ILPJMCoal1,108By the end of 2027Sunset
Miami FortNorth Bend, OHPJMCoal1,020By the end of 2027Sunset
NewtonNewton, ILMISO/PJMCoal615By the end of 2027Sunset
EdwardsBartonville, ILMISOCoal585Retired January 1, 2023Asset Closure
JoppaJoppa, ILMISOCoal802Retired September 1, 2022Asset Closure
JoppaJoppa, ILMISONatural Gas221Retired September 1, 2022Asset Closure
ZimmerMoscow, OHPJMCoal1,300Retired June 1, 2022Asset Closure
Total7,486
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(a)Generation facilities may retire earlier than expected dates disclosed if economic or other conditions dictate.
(b)Retirement dates represent the first full day in which a plant does not operate.