The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481999/410-20-25-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

+ Details

Name:	us-gaap_AssetRetirementObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of asset recognized for present right to economic benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 405
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477571/980-405-25-1

+ Details

Name:	us-gaap_RegulatoryLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Asset Retirement Obligation, Individual Unit Basis Evaluation Period

+ References

No definition available.

+ Details

Name:	vistra_AssetRetirementObligationIndividualUnitBasisEvaluationPeriod
Namespace Prefix:	vistra_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Asset Retirement Obligations [Line Items]

+ References

No definition available.

+ Details

Name:	vistra_AssetRetirementObligationsLineItems
Namespace Prefix:	vistra_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	vistra_AssetRetirementObligationByTypeOfObligationAxis=vistra_NuclearPlantDecommissioningMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=vistra_ComanchePeakNuclearPowerPlantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vistra_AssetRetirementObligationByTypeOfObligationAxis=vistra_NuclearPlantDecommissioningOtherNoncurrentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Asset Retirement Obligations - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Asset Retirement Obligations [Line Items]
Asset retirement obligation	$ 4,269	$ 4,216	$ 4,099	$ 4,078
Assets	$ 50	9
Asset retirement obligation, individual unit basis evaluation period	5 years
Nuclear Plant Decommissioning
Asset Retirement Obligations [Line Items]
Asset retirement obligation	$ 3,456	3,374	$ 3,315	$ 3,240
Nuclear Plant Decommissioning \| Comanche Peak Nuclear Power Plant
Asset Retirement Obligations [Line Items]
Asset retirement obligation	1,869	1,838
Assets	2,737	2,589
Nuclear Plant Decommissioning - Other Noncurrent Liabilities \| Comanche Peak Nuclear Power Plant
Asset Retirement Obligations [Line Items]
Regulatory liabilities	$ 868	$ 751