Amount of cash distribution paid to unit-holder of limited liability company (LLC).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Date of declaration for distribution of cash or unit to member of limited liability company (LLC), in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date of distribution for distribution of cash or unit to member of limited liability company (LLC), in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DividendsAxis=oed_PaymentOneFy2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=oed_PaymentTwoFy2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=oed_PaymentThreeFy2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=oed_PaymentFourFy2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Membership Interests (Schedule Of Distributions Paid) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Dividends Payable [Line Items]
Amount	$ 839	$ 356	$ 319
Payment One FY 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Feb. 17, 2021
Payment Date	Feb. 18, 2021
Amount	$ 96
Payment Two FY 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Apr. 28, 2021
Payment Date	Apr. 29, 2021
Amount	$ 96
Payment Three FY 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Jul. 28, 2021
Payment Date	Jul. 29, 2021
Amount	$ 546
Payment Four FY 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Oct. 27, 2021
Payment Date	Oct. 28, 2021
Amount	$ 101