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Acquisitions and Dispositions - Summary of Assets and Liabilities Transferred (Details) - USD ($)
$ in Millions
 6 Months Ended
Mar. 25, 2022
Jun. 30, 2022
Waiawa Drop Down | Tax Equity Bridge Loan    
Schedule of Asset Acquisition [Line Items]    
Long-term debt $ 60  
Mililani I Drop Down    
Schedule of Asset Acquisition [Line Items]    
Other current and non-current assets 2  
Property, plant and equipment 118  
Right-of-use-assets 19  
Total assets acquired 139  
Long-term debt 100  
Long-term lease liabilities 20  
Other current and non-current liabilities 27  
Total liabilities assumed 147  
Net liabilities assumed (8)  
Unamortized debt issuance costs 3  
Expected contributions upon substantial completion 42  
Mililani I Drop Down | Tax Equity Investors    
Schedule of Asset Acquisition [Line Items]    
Payments to fund project reserve accounts 15  
(Distributions to) contributions from noncontrolling interests 18  
Mililani I Drop Down | CEG    
Schedule of Asset Acquisition [Line Items]    
Repayment of debt at asset acquisition 27  
Payments for associated fees 2  
Mililani I Drop Down | Construction loans    
Schedule of Asset Acquisition [Line Items]    
Long-term debt 16  
Mililani I Drop Down | Sponsor Equity Bridge Loan    
Schedule of Asset Acquisition [Line Items]    
Long-term debt 27  
Mililani I Drop Down | Sponsor Equity Bridge Loan | Tax Equity Investors    
Schedule of Asset Acquisition [Line Items]    
Repayment of debt at asset acquisition 14  
Mililani I Drop Down | Tax Equity Bridge Loan    
Schedule of Asset Acquisition [Line Items]    
Long-term debt $ 60 $ 60