Supplementary Financial Information (Tables)	12 Months Ended
	Dec. 31, 2021
Supplementary Financial Information [Abstract]
Schedule Of Other Deductions And (Income)	Year Ended December 31, 2021 2020 2019 Professional fees $ 9 $ 6 $ 10InfraREIT Acquisition related costs - - 9Recoverable Pension and OPEB - non-service costs 54 55 57Non-recoverable pension and OPEB 3 4 4AFUDC equity income (27) (29) (10)Interest and investment income (8) (4) (5)Other - 1 (2)Total other deductions and (income) - net $ 31 $ 33 $ 63
Schedule Of Interest Expense And Related Charges	Year Ended December 31, 2021 2020 2019 Interest $ 415 $ 413 $ 382Amortization of debt issuance costs and discounts 11 11 9Less AFUDC – capitalized interest portion (13) (19) (16)Total interest expense and related charges $ 413 $ 405 $ 375
Schedule Of Trade Accounts And Other Receivables	At December 31, 2021 2020 Gross trade accounts and other receivables $ 750 $ 767Allowance for uncollectible accounts (12) (7)Trade accounts receivable – net $ 738 $ 760
Summary of Investments And Other Property	At December 31, 2021 2020 Assets related to employee benefit plans $ 133 $ 124Land 20 16Other 2 2Total investments and other property $ 155 $ 142
Schedule Of Property, Plant And Equipment	Composite Depreciation Rate/ At December 31, Average Life at December 31, 2021 2021 2020Assets in service: Distribution 2.5% / 39.5 years $ 15,994 $ 14,937Transmission 2.9% / 34.6 years 13,075 12,156Other assets 5.5% / 18.2 years 1,960 1,855Total 31,029 28,948Less accumulated depreciation 8,659 8,336Net of accumulated depreciation 22,370 20,612Construction work in progress 557 593Held for future use 27 20Property, plant and equipment – net $ 22,954 $ 21,225
Schedule Of Intangible Assets	At December 31, 2021 At December 31, 2020 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Net Amount Amortization NetIdentifiable intangible assets subject to amortization: Land easements $ 641 $ 117 $ 524 $ 623 $ 112 $ 511Capitalized software 1,066 451 615 1,027 484 543Total $ 1,707 $ 568 $1,139 $ 1,650 $ 596 $1,054
Schedule Of Estimated Aggregate Amortization Expenses	Year Amortization Expense2022 $ 672023 $ 672024 $ 662025 $ 662026 $ 66
Schedule Of Operating Lease, Third Party Joint Project And Other Obligations	At December 31, 2021 2020 Operating lease liabilities (Notes 1 and 7) $ 133 $ 124Investment tax credits 4 5Third-party joint project obligation (Note 3) (a) - 100Customer deposits – noncurrent 30 -Other 64 76Total operating lease, third-party joint project and other obligations $ 231 $ 305____________(a)Related to a joint project with LP&L. See Note 3 for more information.
Schedule Of Supplemental Cash Flow Information	Year Ended December 31, 2021 2020 2019Cash payments (receipts) related to: Interest $ 409 $ 406 $ 368Less capitalized interest (13) (19) (16)Interest payments (net of amounts capitalized) $ 396 $ 387 $ 352 Amount in lieu of income taxes (a): Federal $ 61 $ 87 $ 56State 23 22 22Total payments (receipts) in lieu of income taxes $ 84 $ 109 $ 78 Acquisition: Assets acquired $ - $ - $ 2,547Liabilities assumed - - (1,223)Cash paid $ - $ - $ 1,324 Noncash investing and financing activities: Construction expenditures financed through accounts payable (investing) (b) $ 254 $ 254 $ 278Transfer of title to assets constructed for and prepaid by LP&L (investing) (Note 3) $ 150 $ - $ -ROU assets obtained in exchange for operating lease obligations (investing) $ 52 $ 72 $ 38Debt exchange offering (financing) $ - $ 300 $ -______________(a)See Note 10 for income tax related detail. (b)Represents end-of-period accruals.