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Acquisitions and Dispositions - Narrative (Details) $ in Millions									9 Months Ended
	Oct. 15, 2025 USD ($) renewalOption MW	Oct. 02, 2025 USD ($) MW	Sep. 19, 2025 USD ($)	Aug. 13, 2025 USD ($)	Jul. 16, 2025 USD ($) MW	Jun. 10, 2025 USD ($) MW	Apr. 29, 2025 USD ($) MW	Mar. 20, 2025 USD ($) MW	Sep. 30, 2025 USD ($)
Rosamond South I Drop Down
Asset Acquisition [Line Items]
Power purchase agreement period (in years)								15 years
Net assets (liabilities) acquired (assumed)								$ (3)
Rosamond South I Drop Down | Rosamond South Investment LLC | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion				$ 29
Rosamond South I Drop Down | Cash Equity Investor
Asset Acquisition [Line Items]
Payments for asset acquisition								$ 2
Rosamond South I Drop Down | Cash Equity Investor | Rosamond South Investment LLC | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion				41
Rosamond South I Drop Down | Rosie South TargetCo
Asset Acquisition [Line Items]
Payments for asset acquisition				$ 33
Honeycomb TE Holdco LLC | Honeycomb Portfolio Drop Down | Subsequent Event
Asset Acquisition [Line Items]
Payments for asset acquisition	$ 78
Power purchase agreement period (in years)	20 years
Honeycomb TE Holdco LLC | Honeycomb Portfolio Drop Down | Subsequent Event | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion	$ 62
Honeycomb TE Holdco LLC | Honeycomb Portfolio Drop Down | Subsequent Event | Tax Equity Investor
Asset Acquisition [Line Items]
Payments for asset acquisition	59
Honeycomb TE Holdco LLC | Honeycomb Portfolio Drop Down | Subsequent Event | Tax Equity Investor | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion	237
LV-Daggett Parent Holdco LLC | Daggett 1 Drop Down
Asset Acquisition [Line Items]
Payments for asset acquisition			$ 42
Power purchase agreement period (in years)							15 years
Net assets (liabilities) acquired (assumed)							$ 1
LV-Daggett Parent Holdco LLC | Daggett 1 Drop Down | Subsequent Event
Asset Acquisition [Line Items]
Payments for asset acquisition	57
Purchase price	4
LV-Daggett Parent Holdco LLC | Luna Valley Drop Down
Asset Acquisition [Line Items]
Power purchase agreement period (in years)							17 years
Net assets (liabilities) acquired (assumed)							$ (7)
LV-Daggett Parent Holdco LLC | Luna Valley Drop Down | LV-Daggett Parent Holdco LLC
Asset Acquisition [Line Items]
Additional payments for asset acquisition							$ 72
LV-Daggett Parent Holdco LLC | Luna Valley Drop Down | Subsequent Event
Asset Acquisition [Line Items]
Payments for asset acquisition	119
Purchase price	$ 29
Rosie South TargetCo LLC | Rosamond South I Drop Down
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW								140
Payments for asset acquisition								$ 4
Net assets (liabilities) acquired (assumed)								$ (3)
Power generation storage capacity, megawatts | MW								117
Rosie South TargetCo LLC | Rosamond South I Drop Down | Clearway Renew LLC
Asset Acquisition [Line Items]
Payments for asset acquisition								$ 10
Catalina Solar Investment LLC | Catalina Solar Acquisition
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW					109
Payments for asset acquisition					$ 127
Additional payments for asset acquisition					128
Net assets (liabilities) acquired (assumed)					$ 128
Washington Wind LLC | Tuolumne Wind Acquisition
Asset Acquisition [Line Items]
Power purchase agreement period (in years)							15 years
Net assets (liabilities) acquired (assumed)							$ 211
Payments for asset acquisition, including post closing transaction expenses							$ 59
WV Wind HoldCo LLC | Subsequent Event | Discontinued Operations, Disposed of by Sale | Mt. Storm Sale to Clearway Renew
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW		264
Power purchase agreement period (in years)		20 years
Power generation storage capacity, megawatts | MW		335
Percentage of ownership sold		100.00%
Cash consideration		$ 152
Pine Forest CE Class A Owner LLC | Pine Forest Drop Down
Asset Acquisition [Line Items]
Payments for asset acquisition						$ 18
Power purchase agreement period (in years)						20 years
Net assets (liabilities) acquired (assumed)						$ (9)
Pine Forest CE Class A Owner LLC | Pine Forest Drop Down | Pine Forest TargetCo
Asset Acquisition [Line Items]
Payments for asset acquisition						136
Pine Forest CE Class A Owner LLC | Pine Forest Drop Down | Pine Forest TargetCo | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion						72
Pine Forest CE Class A Owner LLC | Pine Forest Drop Down | Pine Forest CE Class A Owner LLC | Clearway Renew LLC
Asset Acquisition [Line Items]
Long -term debt payable on substantial completion						37
Pine Forest CE Class A Owner LLC | Pine Forest Drop Down | Cash Equity Investor | Clearway Renew LLC
Asset Acquisition [Line Items]
Payments for asset acquisition						36
Long -term debt payable on substantial completion						144
Pine Forest TE Class A | Pine Forest Drop Down
Asset Acquisition [Line Items]
Payments for asset acquisition						$ 9
Alternative Energy | Honeycomb TE Holdco LLC | Honeycomb Portfolio Drop Down | Subsequent Event
Asset Acquisition [Line Items]
Number of BESS facilities | renewalOption	4
Power generation capacity, megawatts (over) | MW	320
Payments for asset acquisition	$ 16
Alternative Energy | LV-Daggett Parent Holdco LLC | Daggett 1 Drop Down
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW							114
Payments for asset acquisition							$ 11
Alternative Energy | LV-Daggett Parent Holdco LLC | Luna Valley Drop Down | Luna Valley Class B
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW							200
Payments for asset acquisition							$ 18
Alternative Energy | Catalina Solar Investment LLC | Catalina Solar Acquisition
Asset Acquisition [Line Items]
Payments for asset acquisition, excluding transaction expenses									$ 1
Alternative Energy | Washington Wind LLC | Tuolumne Wind Acquisition
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW							137
Payments for asset acquisition							$ 210
Payments for asset acquisition, excluding transaction expenses									$ 1
Alternative Energy | Pine Forest CE Class A Owner LLC | Pine Forest Drop Down
Asset Acquisition [Line Items]
Power generation capacity, megawatts (over) | MW						300
Power generation storage capacity, megawatts | MW						200

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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