Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2021
Early Plant Retirements [Abstract]
ZEC Charge per kwh	$ 0.004
Proceeds from Divestiture of Businesses		$ 1,920,000,000
Impairment of Long-Lived Assets to be Disposed of		43,000,000	$ 2,691,000,000
ZEC Charge per MWh	10
Early Plant Retirements/Asset Dispositions [Line Items]
Impairment of Long-Lived Assets to be Disposed of		43,000,000	$ 2,691,000,000
Proceeds from Divestiture of Businesses		$ 1,920,000,000
ZEC Charge per MWh	10
Expected Nuclear Production tax Credit per MWh	$ 15