Electric Plant (Schedule Of Net Electric Plan) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 2,542,407	$ 2,536,395
Accumulated depreciation	(1,049,756)	(984,076)
Net Property, plant, and equipment	1,492,651	1,552,319
Nuclear fuel, at amortized cost	14,495	17,321
Construction work in progress	48,956	38,810
Net Electric Plant	1,556,102	1,608,450
Wildcat Point [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	877,789	875,528
Accumulated depreciation	(98,726)	(71,656)
Net Property, plant, and equipment	779,063	803,872
Nuclear fuel, at amortized cost	0	0
Construction work in progress	7	989
Net Electric Plant	779,070	804,861
North Anna [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	416,259	415,227
Accumulated depreciation	(260,491)	(249,546)
Net Property, plant, and equipment	155,768	165,681
Nuclear fuel, at amortized cost	14,495	17,321
Construction work in progress	41,312	34,961
Net Electric Plant	211,575	217,963
Clover [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	707,333	706,417
Accumulated depreciation	(414,647)	(401,363)
Net Property, plant, and equipment	292,686	305,054
Nuclear fuel, at amortized cost	0	0
Construction work in progress	1,311	1,110
Net Electric Plant	293,997	306,164
Combustion Turbine Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	440,168	438,418
Accumulated depreciation	(241,051)	(228,378)
Net Property, plant, and equipment	199,117	210,040
Nuclear fuel, at amortized cost	0	0
Construction work in progress	51	0
Net Electric Plant	199,168	210,040
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	100,858	100,805
Accumulated depreciation	(34,841)	(33,133)
Net Property, plant, and equipment	66,017	67,672
Nuclear fuel, at amortized cost	0	0
Construction work in progress	6,275	1,750
Net Electric Plant	$ 72,292	$ 69,422