Asset Acquisition, Issuance Cost

No definition available.

Name:	cwen_AssetAcquisitionIssuanceCost
Namespace Prefix:	cwen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Asset Acquisition, Purchase Price, Post-Closing Adjustments

+ References

No definition available.

+ Details

Name:	cwen_AssetAcquisitionPurchasePricePostClosingAdjustments
Namespace Prefix:	cwen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments for Asset Acquisition

+ References

No definition available.

+ Details

Name:	cwen_PaymentsForAssetAcquisition
Namespace Prefix:	cwen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments For Asset Acquisitions, Net of Cash Acquired And Transaction Expenses

+ References

No definition available.

+ Details

Name:	cwen_PaymentsForAssetAcquisitionsNetOfCashAcquiredAndTransactionExpenses
Namespace Prefix:	cwen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Power Generation Capacity, Megawatts

+ References

No definition available.

+ Details

Name:	cwen_PowerGenerationCapacityMegawatts
Namespace Prefix:	cwen_
Data Type:	dtr-types:powerItemType
Balance Type:	na
Period Type:	instant

- Definition

Power Purchase Agreement, Number Of Solar Facilities

+ References

No definition available.

+ Details

Name:	cwen_PowerPurchaseAgreementNumberOfSolarFacilities
Namespace Prefix:	cwen_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period of power purchase agreement

+ References

No definition available.

+ Details

Name:	cwen_PowerPurchaseAgreementPeriod
Namespace Prefix:	cwen_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Schedule of Asset Acquisition

+ References

No definition available.

+ Details

Name:	cwen_ScheduleOfAssetAcquisitionLineItems
Namespace Prefix:	cwen_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of acquiree's earnings (loss) since acquisition date of business combination included in consolidated statement of income.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-49

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

+ Details

Name:	us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of acquiree's revenue since acquisition date of business combination included in consolidated statement of income.

+ References

+ Details

Name:	us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

+ Details

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_AssetAcquisitionAxis=cwen_CardinalPortfolioAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=cwen_CardinalPurchaserLLCAndCardinalJVPurchaserLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cwen_ThirdPartyInvestorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cwen_CardinalInvestmentHoldcoLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions - Narrative (Details) $ in Millions			3 Months Ended
Acquisitions - Narrative (Details) $ in Millions	Mar. 30, 2026 USD ($) fund facility MW	Mar. 27, 2026	Jun. 30, 2026 USD ($) state
Schedule of Asset Acquisition [Line Items]
Number of states \| state			27
Weighted average remaining contract duration (in years)		15 years
Cardinal Portfolio acquisition
Schedule of Asset Acquisition [Line Items]
Operating revenues			$ 22
Net income			$ 7
Cardinal Purchaser LLC and Cardinal JV Purchaser LLC
Schedule of Asset Acquisition [Line Items]
Power generation capacity, megawatts \| MW	610
Post-closing adjustments	$ 2
Cardinal Purchaser LLC and Cardinal JV Purchaser LLC \| Cardinal Portfolio acquisition
Schedule of Asset Acquisition [Line Items]
Power generation capacity, megawatts \| MW	225
Number of states \| fund	8
Acquisitions, net of cash acquired	$ 322
Number of solar facilities \| facility	12
Weighted average remaining contract duration (in years)	10 years
Borrowings	$ 100
Payments for asset acquisition and transaction expenses	240
Cardinal Purchaser LLC and Cardinal JV Purchaser LLC \| Cardinal Portfolio acquisition \| Third Party Investor
Schedule of Asset Acquisition [Line Items]
Acquisitions, net of cash acquired	80
Cardinal Purchaser LLC and Cardinal JV Purchaser LLC \| Cardinal Portfolio acquisition \| Cardinal Investment Holdco LLC
Schedule of Asset Acquisition [Line Items]
Acquisitions, net of cash acquired	$ 242