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Long-term Debt - Narrative (Details) $ in Millions								9 Months Ended
Long-term Debt - Narrative (Details) $ in Millions	Oct. 23, 2024 USD ($)	Jul. 25, 2024 USD ($) option	Jun. 13, 2024 USD ($)	Jun. 11, 2024 USD ($)	May 01, 2024 USD ($)	Apr. 16, 2024 USD ($)	Mar. 15, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Equity investments in affiliates								$ 322	$ 360
Rosie Central BESS
Debt Instrument [Line Items]
Equity investments in affiliates			$ 28
Rosie Class B LLC
Debt Instrument [Line Items]
Long-term debt			21
Payments for other fees			11
Rosie Class B LLC \| Cash Equity Investor
Debt Instrument [Line Items]
Remaining balance to distribute			44
Rosie Class B LLC \| CEG
Debt Instrument [Line Items]
Contributions from noncontrolling interests, net of distributions			39
Expected contributions upon substantial completion			56
NIMH Solar
Debt Instrument [Line Items]
Repayments of debt				$ 146
Victory Pass and Arica, due 2024
Debt Instrument [Line Items]
Long-term debt					$ 75
Payments for other fees					18
Victory Pass and Arica, due 2024 \| Cash Equity Investor
Debt Instrument [Line Items]
Expected contributions upon substantial completion					347
Victory Pass and Arica, due 2024 \| CEG
Debt Instrument [Line Items]
Contributions from noncontrolling interests, net of distributions					103
Expected contributions upon substantial completion					52
Victory Pass and Arica, due 2024 \| Tax Equity Investors
Debt Instrument [Line Items]
Expected contributions upon substantial completion					410
Long-term debt, additions								62
Cedar Creek Drop Down
Debt Instrument [Line Items]
Long-term debt						$ 309
Payments for other fees						6
Unamortized debt issuance costs						3
Fund construction completion reserves						16
Texas Solar Nova 2
Debt Instrument [Line Items]
Long-term debt							$ 19
Payments for other fees							4
Unamortized debt issuance costs							1
Texas Solar Nova 2 \| CEG
Debt Instrument [Line Items]
Contributions from noncontrolling interests, net of distributions							9
Rosie TargetCo LLC \| Rosie Class B LLC \| Cash Equity Investor
Debt Instrument [Line Items]
Long-term debt			215
Rosie Class B LLC \| Rosie Class B LLC \| Rosie Central BESS
Debt Instrument [Line Items]
Equity investments in affiliates								$ 28
Term Loan \| Capistrano Portfolio Holdco LLC \| Subsequent Event
Debt Instrument [Line Items]
Financing agreement issuance	$ 121
Debt instrument, basis spread on variable rate	1.625%
Term Loan \| Broken Bow and Crofton Bluffs \| Subsequent Event
Debt Instrument [Line Items]
Contributions from noncontrolling interests, net of distributions	$ 63
Term Loan \| NIMH Solar
Debt Instrument [Line Items]
Long-term debt				137
Term Loan \| Texas Solar Nova 2
Debt Instrument [Line Items]
Long-term debt							80
Letter of Credit \| Capistrano Portfolio Holdco LLC \| Subsequent Event
Debt Instrument [Line Items]
Financing agreement issuance	$ 42
Letter of Credit \| Natural Gas CA Holdco LLC LC Facility
Debt Instrument [Line Items]
Long-term debt, outstanding		$ 200
Maturity (in years)		3 years
Number of additional option \| option		2
Letter of Credit \| Natural Gas CA Holdco LLC LC Facility \| Minimum
Debt Instrument [Line Items]
Extension period (in years)		1 year
Letter of Credit \| NIMH Solar
Debt Instrument [Line Items]
Long-term debt				$ 17
Tax Equity Bridge Loan \| Rosie Class B LLC
Debt Instrument [Line Items]
Long-term debt			186
Tax Equity Bridge Loan \| Victory Pass and Arica, due 2024
Debt Instrument [Line Items]
Long-term debt					468
Tax Equity Bridge Loan \| Cedar Creek Drop Down
Debt Instrument [Line Items]
Long-term debt						109
Tax Equity Bridge Loan \| Texas Solar Nova 2
Debt Instrument [Line Items]
Long-term debt							115
Tax Equity Investors \| Cedar Creek Drop Down
Debt Instrument [Line Items]
Long-term debt						108
Tax Equity Investors \| Texas Solar Nova 2
Debt Instrument [Line Items]
Long-term debt							$ 130
Cash Equity Bridge Loan \| Victory Pass and Arica, due 2024
Debt Instrument [Line Items]
Repayments of debt					351
Construction Loan \| Rosie Class B LLC
Debt Instrument [Line Items]
Long-term debt, additions			115
Construction Loan \| Cedar Creek Drop Down
Debt Instrument [Line Items]
Long-term debt						112
Long-term debt, additions						110
Asset acquisition, partial payment of long term debt						2
Sponsor Equity Loan \| Cedar Creek Drop Down
Debt Instrument [Line Items]
Long-term debt						$ 91
Clearway Energy LLC and Clearway Energy Operating LLC Revolving Credit Facility, due 2028
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								1.50%
Clearway Renew LLC \| Rosie Class B LLC
Debt Instrument [Line Items]
Long-term debt			64
Clearway Renew LLC \| Rosie TargetCo LLC \| Rosie Class B LLC
Debt Instrument [Line Items]
Payments to acquire productive assets			279
Clearway Renew LLC \| Rosie Class B LLC \| Rosie Class B LLC
Debt Instrument [Line Items]
Repayments of debt			$ 184
Clearway Renew LLC \| VP-Arica TargetCo LLC \| Victory Pass and Arica, due 2024
Debt Instrument [Line Items]
Payments to acquire productive assets					$ 165