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Debt and Available Credit Facilities - Amended and Restated CA (Details) - USD ($)
3 Months Ended 9 Months Ended
Nov. 30, 2022
Jan. 31, 2025
Jan. 31, 2024
Jan. 31, 2025
Jan. 31, 2024
Apr. 30, 2024
Line of Credit Facility [Line Items]            
Letters of credit outstanding amount   $ 200,000   $ 200,000    
Amended and Restated RCA            
Line of Credit Facility [Line Items]            
Term of credit facility       5 years    
Revolving Credit Facility Through November 2027            
Line of Credit Facility [Line Items]            
Term of credit facility       18 months    
Revolving Credit Facility | Amended and Restated RCA            
Line of Credit Facility [Line Items]            
Term of credit facility 5 years          
Credit commitments, principal amount $ 1,115,000,000          
Existing credit commitments   415,600,000   $ 415,600,000    
Revolving Credit Facility | Amended and Restated RCA | Syndicate Bank Group led by Bank of America            
Line of Credit Facility [Line Items]            
Optional credit limit increase available on request 500,000,000          
Value of minimum increments $ 50,000,000          
Revolving Credit Facility | Amended and Restated RCA | Syndicate Bank Group led by Bank of America | Base Rate            
Line of Credit Facility [Line Items]            
Margin rate over reference rate used in determining base rate 0.50%          
Revolving Credit Facility | Amended and Restated RCA | Syndicate Bank Group led by Bank of America | Daily Secured Overnight Financing Rate (SOFR)            
Line of Credit Facility [Line Items]            
Margin rate over reference rate used in determining base rate 1.00%          
Revolving Credit Facility | Amended and Restated RCA | Minimum | Secured Overnight Financing Rate (SOFR)            
Line of Credit Facility [Line Items]            
Margin rate (as a percent) 0.10%          
Revolving Credit Facility | Amended and Restated RCA | Minimum | Syndicate Bank Group led by Bank of America            
Line of Credit Facility [Line Items]            
Line of credit facility, Commitment fee percentage 0.15%          
Revolving Credit Facility | Amended and Restated RCA | Minimum | Syndicate Bank Group led by Bank of America | SOFR, SONIA, and EURIBOR-Based Rates            
Line of Credit Facility [Line Items]            
Applicable margin 0.98%          
Revolving Credit Facility | Amended and Restated RCA | Minimum | Syndicate Bank Group led by Bank of America | Base Rate            
Line of Credit Facility [Line Items]            
Applicable margin 0.00%          
Revolving Credit Facility | Amended and Restated RCA | Maximum | Secured Overnight Financing Rate (SOFR)            
Line of Credit Facility [Line Items]            
Margin rate (as a percent) 0.25%          
Revolving Credit Facility | Amended and Restated RCA | Maximum | Syndicate Bank Group led by Bank of America            
Line of Credit Facility [Line Items]            
Line of credit facility, Commitment fee percentage 0.25%          
Revolving Credit Facility | Amended and Restated RCA | Maximum | Syndicate Bank Group led by Bank of America | SOFR, SONIA, and EURIBOR-Based Rates            
Line of Credit Facility [Line Items]            
Applicable margin 1.50%          
Revolving Credit Facility | Amended and Restated RCA | Maximum | Syndicate Bank Group led by Bank of America | Federal Funds Effective Rate            
Line of Credit Facility [Line Items]            
Applicable margin 0.50%          
Term Loan A Facility | Amended and Restated RCA            
Line of Credit Facility [Line Items]            
Term of credit facility 5 years          
Debt instrument, face amount $ 200,000,000          
Revolving Credit Facility Through May 2024 | Amended and Restated RCA            
Line of Credit Facility [Line Items]            
Credit commitments, principal amount $ 185,000,000          
Line of Credit            
Line of Credit Facility [Line Items]            
Credit commitments, principal amount   $ 1,303,300,000   $ 1,303,300,000    
Average interest rates on total debt outstanding   5.96% 5.66% 6.05% 5.52%  
Weighted average interest rates   5.75%   5.75%   6.07%
Line of Credit | Other Credit Facilities            
Line of Credit Facility [Line Items]            
Credit commitments, principal amount   $ 1,000,000.0   $ 1,000,000.0    
Outstanding borrowings under revolving credit facilities   $ 0   $ 0   $ 0