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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 03, 2025 | Jun. 10, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Restricted cash |  |  | $ 390 |  | $ 401
Special distribution paid |  |  | 7 | $ 0 |
Special distribution utilized to make tax payments |  | $ 9 |  |  |
CEG |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Special distribution paid |  | $ 7 |  |  |
Common Class A | Subsequent Event |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Common stock, dividends, per share, declared (in dollars per share) | $ 0.4528 |  |  |  |
Common Class C | Subsequent Event |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Common stock, dividends, per share, declared (in dollars per share) | 0.4528 |  |  |  |
Common Class B | Subsequent Event |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Common stock, dividends, per share, declared (in dollars per share) | 0.4528 |  |  |  |
Distribution made to limited liability (LLC) member, distributions declared, per unit (in dollars per share) | 0.4528 |  |  |  |
Common Class D | Subsequent Event |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Common stock, dividends, per share, declared (in dollars per share) | 0.4528 |  |  |  |
Distribution made to limited liability (LLC) member, distributions declared, per unit (in dollars per share) | $ 0.4528 |  |  |  |
Long Term Debt Current |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Restricted cash |  |  | 79 |  |
Debt Service Obligations |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Restricted cash |  |  | 84 |  |
Cash Distribution |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Restricted cash |  |  | 42 |  |
Operating Funds |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Restricted cash |  |  | 185 |  |
Project Level Subsidiaries |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Cash and cash equivalents, held at project subsidiaries |  |  | $ 223 |  | $ 194

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