Provision In Lieu Of Income Taxes (Tables)	12 Months Ended
Dec. 31, 2021
Provision In Lieu Of Income Taxes [Abstract]
Schedule Of Deferred Tax Assets and Liabilities	At December 31, 2021 2020 Deferred Tax Related Assets: Employee benefit liabilities $ 253 $ 233Regulatory liabilities 45 48Other 45 47Total 343 328Deferred Tax Related Liabilities: Property, plant and equipment 2,132 1,994Regulatory assets 274 255Other 2 2Total 2,408 2,251Liability in lieu of deferred income taxes – net $ 2,065 $ 1,923
Components Of Income Tax Provisions (Benefits)	Year Ended December 31, 2021 2020 2019 Reported in operating expenses: Current: U.S. federal $ 79 $ 100 $ 69State 24 22 22Deferred: U.S. federal 63 27 49Amortization of investment tax credits (1) (1) (2)Total reported in operating expenses 165 148 138Reported in other income and deductions: Current: U.S. federal (17) (17) (21)Deferred federal 5 5 6Total reported in other income and deductions (12) (12) (15)Total provision in lieu of income taxes $ 153 $ 136 $ 123
Schedule Of Income Tax Reconciliation	Year Ended December 31, 2021 2020 2019 Income before provision in lieu of income taxes $ 923 $ 849 $ 774Provision in lieu of income taxes at the U.S. federal statutory rate of 21% $ 194 $ 178 $ 163Amortization of investment tax credits – net of deferred tax effect (1) (1) (2)Amortization of excess deferred taxes (52) (52) (52)Texas margin tax, net of federal tax benefit 19 18 17Nontaxable gains on benefit plan investments (3) (2) (2)Other (4) (5) (1)Reported provision in lieu of income taxes $ 153 $ 136 $ 123Effective rate 16.6% 16.0% 15.9%

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319

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- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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