Quarterly report [Sections 13 or 15(d)]

Our Portfolio - Additional Information (Details)

v3.25.1
Our Portfolio - Additional Information (Details)
 3 Months Ended
May 08, 2025
May 04, 2024
USD ($)
director
vote
Jul. 01, 2020
committee_member
Mar. 31, 2025
USD ($)
committee_member
project
GW
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Equity method investments, receivables, real estate and investments       $ 7,056,000,000      
Allowance on receivables       54,000,000   $ 50,000,000  
Total assets       7,475,961,000   7,080,245,000  
Loans       2,961,388,000   2,895,837,000  
Carrying Value       3,993,054,000   3,612,394,000  
Joint Venture              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Services agreement   1.00%          
Joint Venture | CarbonCount Holdings 1 LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Investment period   18 months          
Directors | director   4          
Affirmative director vote | vote   3          
Total assets       $ 989,000,000      
Receivables (in percent)       84      
Joint Venture | CarbonCount Holdings 1 LLC | Subsequent Event              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Investment period 30 months            
Joint Venture | Minimum              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Management services   0.50%          
Joint Venture | Maximum              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Management services   1.00%          
Joint Venture | Maximum | CarbonCount Holdings 1 LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Investment   $ 1,000,000,000          
Equity method investee              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Carrying Value       $ 1,200,000,000      
Debt term       10 years      
Hannon Armstrong Sustainable Infrastructure Inc. | Joint Venture | CarbonCount Holdings 1 LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Directors | director   2          
CarbonCount Holdings 1 LLC | Joint Venture              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Investment   $ 503,000,000          
CarbonCount Holdings 1 LLC | Joint Venture | KKR Entity              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Investment   $ 503,000,000          
KKR Entity | Joint Venture | CarbonCount Holdings 1 LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Directors | director   2          
Jupiter Equity Holdings LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Portfolio of renewable energy projects, power (gigawatts) | GW       2.3      
Capital contribution       $ 562,000,000      
Working capital loan       98,000,000      
Distribution percent (as a percent)     49.00%        
Review committee | committee_member     4        
Distribution from partnership, upon achievement of certain targets (as a percent)     33.00%        
Carrying Value       $ 629,000,000      
Jupiter Equity Holdings LLC | Sponsor              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Distribution from partnership, upon achievement of certain targets (as a percent)     67.00%        
Jupiter Equity Holdings LLC | Company              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member     2        
Jupiter Equity Holdings LLC | Sponsor              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member     2        
Jupiter Equity Holdings LLC | Jupiter Equity Holdings LLC | Class A units              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Ownership percent (as a percent)     100.00%        
Jupiter Equity Holdings LLC | Onshore wind projects              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Projects owned | project       9      
Jupiter Equity Holdings LLC | Solar projects              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Projects owned | project       4      
Daggett Renewable Holdco LLC              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Projects owned | project       2      
Review committee | committee_member       4      
Preferred cash equity interest investment       $ 232,000,000      
Carrying Value       $ 417,000,000      
Daggett Renewable Holdco LLC | Company              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member       2      
Daggett Renewable Holdco LLC | Sponsor              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member       2      
The Lighthouse Partnerships              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Projects owned | project       3      
Working capital loan       $ 19,000,000      
Review committee | committee_member       4      
Preferred cash equity interest investment       $ 420,000,000      
The Lighthouse Partnerships | Company              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member       2      
The Lighthouse Partnerships | Sponsor              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Review committee | committee_member       2      
Receivables              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance on receivables       $ 54,000,000 $ 52,000,000 $ 50,000,000 $ 50,000,000
Decrease in reserve       4,000,000 $ 2,000,000    
Receivables | Equity method investee              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Loans       813,000,000      
Receivables | Performance Rating 3              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Equity method investments, receivables, real estate and investments       0      
Allowance on receivables       0      
Decrease in reserve       4,000,000      
Loans       0      
Carrying Value       $ 0