Quarterly report pursuant to Section 13 or 15(d)

Pass-through Financing Obligations (Details)

v3.19.3
Pass-through Financing Obligations (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Property Subject to or Available for Operating Lease [Line Items]    
Customer agreement, initial term 22 years  
Minimum    
Property Subject to or Available for Operating Lease [Line Items]    
Customer agreement, initial term 20 years  
Maximum    
Property Subject to or Available for Operating Lease [Line Items]    
Customer agreement, initial term 25 years  
Solar energy systems under lease pass-through fund arrangements    
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems, gross $ 658.0 $ 664.1
Depreciation on lease 90.5 $ 82.1
Extinguishment of financing obligation 11.7  
Debt extinguishment expense $ 4.4  
Solar energy systems under lease pass-through fund arrangements | Minimum    
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems, initial term 20 years  
Solar energy systems under lease pass-through fund arrangements | Maximum    
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems, initial term 22 years