Power Purchase Agreements (Schedule Of Power Purchase Obligations) (Details) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Regulated Operations [Abstract]
2024	$ 119.2
2025	16.5
2026	4.2
Power Purchase Obligations	$ 139.9

Capacity and energy commitments in next twelve months.

No definition available.

Name:	ck0000885568_CapacityAndEnergyCommitmentsInNextTwelveMonths
Namespace Prefix:	ck0000885568_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration