Pension And OPEB Plans (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) item	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Net regulatory asset	$ (1,321,000)		$ (1,329,000)
Number of defined pension plans in which the Company participates | item	2
Percentage of plan attributed to regulated business	100.00%
Oncor Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.91%
Expected return on plan assets	4.87%
Vistra Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.94%
Expected return on plan assets	4.66%
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial (loss)	$ (8,000)	$ (13,000)
Cash contributions	1,000
Additional cash contributions	4,000
Additional cash contributions, next five years	$ 90,000
OPEB Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial (loss)		$ (4,000)
Discount rate	2.47%
Expected return on plan assets	5.61%
Cash contributions	$ 9,000
Additional cash contributions	26,000
Additional cash contributions, next five years	$ 177,000