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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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