Commitments and Contingencies (Nuclear Insurance) (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Proceeds from legal settlements of share of claims incurred in previous year	$ 6,000,000	$ 1,000,000	$ 1,000,000
Nuclear Insurance
Loss Contingencies [Line Items]
Maximum liability protection per nuclear incident amount	16,200,000,000
Maximum liability each nuclear plant is insured against	450,000,000
Amount that could be assessed for each licensed reactor	166,000,000
Amount that could be assessed for each licensed reactor per year	$ 25,000,000
Inflation adjustment period for nuclear insurance	5 years
NEIL maximum insurance coverage to nuclear facility for property damage and outage costs	$ 1,060,000,000.00
NEIL maximum insurance coverage to nuclear facility for property damage and outage costs from non-nuclear event	1,000,000
NEIL aggregate maximum loss for any single loss occurrence	1,060,000,000.00
NEIL maximum retrospective premium assessment	12,000,000
EMANI maximum insurance coverage for property damage and outage costs from non-nuclear event	1,000,000
DESC Summer | Nuclear Insurance
Loss Contingencies [Line Items]
Amount that could be assessed for each licensed reactor	111,000,000
Amount that could be assessed for each licensed reactor per year	$ 15,000,000