Revenues (Tables)	12 Months Ended
Dec. 31, 2021
Revenues [Abstract]
Disaggregation Of Revenues	Year Ended December 31, 2021 2020 2019Operating revenues Revenues contributing to earnings: Distribution base revenues $ 2,217 $ 2,156 $ 2,143Transmission base revenues (TCOS revenues) Billed to third-party wholesale customers 879 803 681Billed to REPs serving Oncor distribution customers, through TCRF 479 446 391Total transmission base revenues 1,358 1,249 1,072Other miscellaneous revenues 104 87 77Total revenues contributing to earnings 3,679 3,492 3,292 Revenues collected for pass-through expenses: TCRF – third-party wholesale transmission service 1,039 975 1,005EECRF 46 44 50Revenues collected for pass-through expenses 1,085 1,019 1,055 Total operating revenues $ 4,764 $ 4,511 $ 4,347

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Name:	us-gaap_DisaggregationOfRevenueTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration