Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt and Bank Loans (Footnotes) (Details)

v3.19.2
Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt and Bank Loans (Footnotes) (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Collateral Pledged [Member]    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Restricted cash $ 44 $ 35
Asset-Backed Non-recourse Debt [Member]    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Total collateral pledged against our nonrecourse debt $ 920 $ 1,105
HASI SYB Loan Agreement 2015-2 [Member] | Interest Rate Swap [Member] | Asset-Backed Non-recourse Debt [Member]    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Derivative rate 2.55%  
2017 Master Repurchase Agreement [Member] | Interest Rate Swap [Member] | Asset-Backed Non-recourse Debt [Member]    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Derivative rate 2.42%