Commitments And Contingencies (Narrative) (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Commitments And Contingencies [Abstract]
Operating leases treated as capital leases	$ 5,000

Lessee, Operating Lease, Treated As Capital Leases

No definition available.

Name:	oed_LesseeOperatingLeaseTreatedAsCapitalLeases
Namespace Prefix:	oed_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant