Quarterly report pursuant to Section 13 or 15(d)

Credit Facilities and Commercial Paper Notes - Additional Information (Details)

v3.22.2.2
Credit Facilities and Commercial Paper Notes - Additional Information (Details)
 1 Months Ended 9 Months Ended
Feb. 28, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
facility
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Apr. 30, 2021
USD ($)
Line of Credit Facility [Line Items]            
Unamortized debt issuance costs     $ 10,000,000   $ 10,000,000  
Proceeds from issuance of commercial paper notes     $ 50,000,000 $ 0    
Credit facilities            
Line of Credit Facility [Line Items]            
Number of revolving credit facilities | facility     2      
Unamortized issuance costs     $ 1,000,000      
Default underlying financings (as a percent, more than)     50.00%      
Credit facilities | LIBOR            
Line of Credit Facility [Line Items]            
Default interest rate (as a percent)     2.00%      
Credit facilities | Rep-Based Facility            
Line of Credit Facility [Line Items]            
Principal amount     $ 100,000,000      
Availability fee (as a percent)     0.60%      
Credit facilities | Rep-Based Facility | U.S. federal government            
Line of Credit Facility [Line Items]            
Applicable valuation (as a percent)     85.00%      
Credit facilities | Rep-Based Facility | Institutional            
Line of Credit Facility [Line Items]            
Applicable valuation (as a percent)     80.00%      
Credit facilities | Rep-Based Facility | LIBOR            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent)     1.40%      
Interest rate (as a percent)     1.85%      
Credit facilities | Rep-Based Facility | Federal Funds Rate            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent)     0.40%      
Interest rate (as a percent)     0.85%      
Credit facilities | Approval-Based Facility            
Line of Credit Facility [Line Items]            
Principal amount     $ 200,000,000      
Credit facilities | Approval-Based Facility | Certain approved existing financing            
Line of Credit Facility [Line Items]            
Applicable valuation (as a percent)     85.00%      
Credit facilities | Approval-Based Facility | Others as prescribed by administrative agent            
Line of Credit Facility [Line Items]            
Applicable valuation (as a percent)     67.00%      
Credit facilities | Approval-Based Facility | LIBOR            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent)     1.50%      
Interest rate (as a percent)     2.00%      
Credit facilities | Approval-Based Facility | Federal Funds Rate            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent)     0.50%      
Interest rate (as a percent)     1.00%      
Credit facilities | New Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Principal amount $ 600,000,000          
Term loan fee (as a percent) 1.875%          
Credit facilities | New Revolving Credit Facility | SOFR            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent) 1.875%          
Credit facilities | New Revolving Credit Facility | Prime Rate            
Line of Credit Facility [Line Items]            
Basis spread on variable rate (as a percent) 0.875%          
Credit facilities | Existing Unsecured Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Principal amount           $ 400,000,000
Outstanding credit facility     $ 50,000,000      
Line of credit facility, interest rate during period (as a percent)     4.959%      
Unamortized debt issuance costs     $ 3,000,000      
Credit facilities | CarbonCount Green Commercial Paper Note Program            
Line of Credit Facility [Line Items]            
Line of credit facility, interest rate during period (as a percent)     4.05%      
Letter of Credit            
Line of Credit Facility [Line Items]            
Principal amount   $ 100,000,000   100,000,000    
Letter of Credit | CarbonCount Green Commercial Paper Note Program            
Line of Credit Facility [Line Items]            
Percentage of drawn letter of credit (as a percent)   0.0095        
Unused letter of credit capacity (as a percent)   0.40%        
Reduced percentage of letter of credit fee (as a percent)   0.0005        
Commercial Paper            
Line of Credit Facility [Line Items]            
Principal amount   $ 100,000,000   $ 100,000,000    
Credit facility remaining no of days (in days)   397 days        
Commercial Paper | CarbonCount Green Commercial Paper Note Program            
Line of Credit Facility [Line Items]            
Proceeds from issuance of commercial paper notes     $ 100,000,000      
Broker fee percent (as a percent)   0.0010        
Unamortized financing costs     $ 1,000,000