Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt (Details)

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Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Unamortized financing costs $ (10) $ (10)
Total non-recourse debt 416 430
Carrying Value of Assets Pledged as of 1,594 1,460
Collateral Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Restricted cash 23 24
Collateral pledged | Nonrecourse    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of 553 573
Asset-backed non-recourse debt | HASI Sustainable Yield Bond 2015-1A    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Notes $ 75 77
Interest rate (as a percent) 4.28%  
Anticipated Balance at Maturity $ 0  
Asset-backed non-recourse debt | HASI Sustainable Yield Bond 2015-1A | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of 125 133
Asset-backed non-recourse debt | HASI SYB Trust 2016-2    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Notes $ 60 62
Interest rate (as a percent) 4.35%  
Anticipated Balance at Maturity $ 0  
Asset-backed non-recourse debt | HASI SYB Trust 2016-2 | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of 63 65
Asset-backed non-recourse debt | HASI SYB Trust 2017-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Notes $ 144 146
Interest rate (as a percent) 3.86%  
Anticipated Balance at Maturity $ 0  
Asset-backed non-recourse debt | HASI SYB Trust 2017-1 | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of 202 203
Asset-backed non-recourse debt | Lannie Mae Series 2019-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Notes $ 92 93
Interest rate (as a percent) 3.68%  
Anticipated Balance at Maturity $ 0  
Asset-backed non-recourse debt | Lannie Mae Series 2019-1 | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of 107 107
Other non-recourse debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Other non-recourse debt 55 62
Anticipated Balance at Maturity $ 18  
Other non-recourse debt | Minimum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest rate (as a percent) 3.15%  
Other non-recourse debt | Maximum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest rate (as a percent) 7.23%  
Other non-recourse debt | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying Value of Assets Pledged as of $ 56 $ 65