Property, Plant, and Equipment - Schedule of Planned Retirements of Generation Capacity (Details) - MW	Jun. 30, 2026	Dec. 31, 2025	Jul. 31, 2025	Mar. 31, 2025	Jan. 16, 2025
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	4,578
Baldwin \| East
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	1,185
Coleto Creek \| Texas
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	650
Kincaid \| East
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	1,108
Miami Fort \| East
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	1,020
Newton \| East
Retirement of Generation Facilities [Line Items]
Net Capacity (MW)	615
Moss Landing Battery Energy Storage System Phase I \| Moss Landing Power Plant (Battery Storage Project)
Retirement of Generation Facilities [Line Items]
Battery energy storage system capacity	300	100	300	300	300
Moss Landing Battery Energy Storage System Phase II \| Moss Landing Power Plant (Battery Storage Project)
Retirement of Generation Facilities [Line Items]
Battery energy storage system capacity	100	100