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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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