v3.26.3
Loans - Additional Information - Borrower Risk Ratings (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2026
USD ($)
Aug. 31, 2026
USD ($)
borrower
loan
hurricane
Nov. 30, 2025
May 31, 2026
USD ($)
borrower
loan
Feb. 28, 2026
USD ($)
Aug. 31, 2025
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Term of loans   35 years        
Loans originated, five years before reporting period   $ 21,343,354,000   $ 19,273,122,000 $ 19,273,000,000  
Percentage of loans originated, five years before reporting period   56.00%   50.00%    
% of Total   100.00%   100.00%    
Financing receivable, before allowance for credit loss, average remaining maturity   19 years 19 years      
Loans to members   $ 38,337,318,000   $ 38,422,128,000   $ 37,569,601,000
Number of borrowers | borrower   896   903    
Number of successive hurricanes | hurricane   2        
Nonaccrual Loans   $ 5,000,000   $ 7,500,000    
CFC            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
% of Total   95.00%   95.00%    
Nonaccrual Loans   $ 5,000,000   $ 7,500,000    
CFC | Distribution            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
% of Total   79.00%   78.00%    
Nonaccrual Loans   $ 0   $ 0    
Criticized            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   $ 32,760,000   $ 36,448,000    
% of Total   1.00%   1.00%    
Loans to members   $ 204,000,000   $ 207,000,000    
Special mention            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   27,760,000   28,948,000    
Loans to members   199,000,000   199,000,000    
Special mention | CFC            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   27,760,000   28,948,000    
Special mention | CFC | Distribution            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   $ 18,687,000   $ 19,224,000    
Special mention | CFC | CFC Electric Distribution Borrower And Subsidiary | Distribution            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Number of borrowers | borrower   1   1    
Special mention | CFC | CFC Electric Distribution Borrower | Distribution            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans to members   $ 190,000,000   $ 189,000,000    
Doubtful            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   5,000,000   $ 7,500,000    
Decrease in finance receivables   $ 3,000,000        
Number of loans outstanding | loan   1   1    
Doubtful | Nonperforming Financial Instruments            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
% of Total   0.01%   0.02%    
Nonaccrual Loans   $ 5,000,000   $ 8,000,000    
Proceeds from collection of finance receivables   3,000,000        
Doubtful | Nonperforming Financial Instruments | Subsequent Event            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Nonaccrual Loans $ 3,000,000          
Proceeds from collection of finance receivables $ 2,000,000          
Substandard            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans originated, five years before reporting period   0   0    
Loans to members   $ 0   $ 0    
Long-term loans            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
% of Total   89.00%   88.00%