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
Mar. 31, 2022
Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Unamortized financing costs $ (10) $ (10)
Total non-recourse debt 424 430
Collateral Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Restricted cash 21 24
Asset-backed non-recourse debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Total collateral pledged against our nonrecourse debt 567 573
Asset-backed non-recourse debt | HASI Sustainable Yield Bond 2015-1A    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Senior Notes $ 76 77
Interest rate (as a percent) 4.28%  
Anticipated Balance at Maturity $ 0  
Carrying value of assets pledged, receivables 133 133
Asset-backed non-recourse debt | HASI SYB Trust 2016-2    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Senior Notes $ 63 62
Interest rate (as a percent) 4.35%  
Anticipated Balance at Maturity $ 0  
Carrying value of assets pledged, receivables 64 65
Asset-backed non-recourse debt | HASI SYB Trust 2017-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Senior Notes $ 145 146
Interest rate (as a percent) 3.86%  
Anticipated Balance at Maturity $ 0  
Carrying value of assets pledged, receivables 203 203
Asset-backed non-recourse debt | Lannie Mae Series 2019-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Senior Notes $ 92 93
Interest rate (as a percent) 3.68%  
Anticipated Balance at Maturity $ 0  
Carrying value of assets pledged, receivables 107 107
Other non-recourse debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Other non-recourse debt 58 62
Anticipated Balance at Maturity 18  
Carrying value of assets pledged, receivables $ 60 $ 65
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%