v3.26.1
Borrowings - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Apr. 30, 2025
Dec. 20, 2017
May 09, 2014
Feb. 28, 2026
May 31, 2026
May 31, 2025
Jan. 25, 2022
Feb. 27, 2019
Mar. 31, 2017
Mar. 02, 2017
May 29, 2015
Debt Instrument [Line Items]                      
Maturities of long-term debt in 2027         $ 409,000,000            
Maturities of long-term debt in 2028         280,800,000            
Maturities of long-term debt in 2029         353,700,000            
Maturities of long-term debt in 2030         2,000,000            
Maturities of long-term debt in 2031         599,100,000            
Maturities of long-term debt thereafter         901,400,000            
Credit facility, available liquidity         774,300,000            
Liquidity available         $ 1,089,500,000            
Consolidated indebtedness         43.30% 47.80%          
Issuance of Debt                      
Debt Instrument [Line Items]                      
Covenant leverage ratio         4.25%            
Accounts Receivable Securitization Program with Two Banks, through April 30, 2028                      
Debt Instrument [Line Items]                      
Credit facility borrowing maximum capacity $ 300,000,000       $ 300,000,000            
Credit facility expiration date Apr. 30, 2028                    
Percentage of indirect economic interest held in SPE     100.00%                
Outstanding balance         $ 274,000,000            
Maturity date         Apr. 30, 2028 Apr. 30, 2028          
Unsecured 5.25% notes due June 1, 2045                      
Debt Instrument [Line Items]                      
Issuance of note                   $ 50,000,000 $ 250,000,000
Debt, interest rate         5.25% [1] 5.25% [1]       5.25% 5.25%
Debt instrument, effective interest rate         5.29%            
Note Interest payment frequency, term         Interest on the 2045 Notes is payable semiannually in arrears on June 1st and December 1st of each year at a rate of 5.25% per year            
Maturity date [1]         Jun. 01, 2045 Jun. 01, 2045          
Unsecured 3.75% notes due March 15, 2027                      
Debt Instrument [Line Items]                      
Issuance of note                   $ 400,000,000  
Debt, interest rate         3.75% [1] 3.75% [1]       3.75%  
Debt instrument, effective interest rate         3.77%            
Note Interest payment frequency, term         Interest on the 2027 Notes is payable semiannually in arrears on March 15th and September 15th of each year, at a rate of 3.75% per year            
Maturity date [1]         Mar. 15, 2027 Mar. 15, 2027          
2.950% Notes due 2032                      
Debt Instrument [Line Items]                      
Interest payment terms         Interest on the Notes accrues from January 25, 2022 and will be payable semiannually in arrears on January 15 and July 15 of each year, beginning July 15, 2022, at a rate of 2.95% per year. The effective interest rate on the notes, including the amortization of the discount, is 2.98%.            
Interest frequency of payment term         semiannually            
Issuance of note             $ 300,000,000        
Debt, interest rate             2.95%        
Debt instrument, effective interest rate         2.98%            
Maturity date         Jan. 15, 2032            
Unsecured 4.55% senior notes due March 1, 2029                      
Debt Instrument [Line Items]                      
Issuance of note               $ 350,000,000      
Debt, interest rate         4.55% [1] 4.55% [1]   4.55%      
Debt instrument, effective interest rate         4.57%            
Note Interest payment frequency, term         Interest on the 2029 Notes accrues from February 27, 2019 and is payable semiannually in arrears on March 1st and September 1st of each year, beginning September 1, 2019, at a rate of 4.55% per year.            
Maturity date [1]         Mar. 01, 2029 Mar. 01, 2029          
Unsecured 4.25% notes due January 15, 2048                      
Debt Instrument [Line Items]                      
Issuance of note   $ 300,000,000                  
Debt, interest rate   4.25%     4.25% [1] 4.25% [1]          
Debt instrument, effective interest rate         4.25%            
Note Interest payment frequency, term         Interest on the 2048 Notes accrues from December 20, 2017 and is payable semiannually in arrears on January 15th and July 15th of each year, beginning July 15, 2018, at a rate of 4.25% per year.            
Maturity date [1]         Jan. 15, 2048 Jan. 15, 2048          
Unsecured 6.50% senior notes due February 15, 2018                      
Debt Instrument [Line Items]                      
Debt, interest rate   6.50%                  
Maturity date         Feb. 15, 2018            
Repayment of aggregate principal amount outstanding   $ 250,000,000                  
Additional Aggregate Principal | Unsecured 5.25% notes due June 1, 2045                      
Debt Instrument [Line Items]                      
Issuance of note                 $ 50,000,000   $ 250,000,000
Debt, interest rate                 4.84%   5.25%
Minimum | Issuance of Debt                      
Debt Instrument [Line Items]                      
Covenant leverage ratio         3.75%            
Minimum | Accounts Receivable Securitization Program with Two Banks, through April 30, 2028                      
Debt Instrument [Line Items]                      
Monthly unused commitment fee         0.30%            
Maximum | Accounts Receivable Securitization Program with Two Banks, through April 30, 2028                      
Debt Instrument [Line Items]                      
Monthly unused commitment fee         0.50%            
Margin | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate         85.00%            
Margin | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate         90.00%            
Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Credit facility, available liquidity         $ 748,300,000            
Credit facility borrowing maximum capacity       $ 1,350,000,000              
Credit facility expiration date       Feb. 27, 2031              
Net leverage ratio         1.70%            
Maturity date [2]         Feb. 27, 2031 Feb. 27, 2031          
[1] Net of bond discounts and premiums of $0.7 million and $0.6 million at May 31, 2026 and 2025, respectively.
[2] Interest as of May 31, 2026 was 4.63% for the USD denominated swingline account and the revolver, which are tied to SOFR; 2.93% on EUR denominated debt which is tied to ESTR; 3.25% on CAD denominated debt, which is tied to CORRA. The debt balances outstanding, excluding deferred financing fees, as of May 31, 2026 for the USD denominated swingline, USD denominated revolver, EUR denominated revolver, and CAD denominated revolver were as follows: $7.2 million, $55.0 million, $163.3 million, and $372.7 million.

Interest as of May 31, 2025 was 5.53% for the USD denominated swingline account, which is tied to SOFR; 3.31% on EUR denominated debt which is tied to ESTR; and 5.34% on GBP denominated debt, which is tied to the Sterling Overnight Index Average (SONIA). The debt balances outstanding, excluding deferred financing fees, as of May 31, 2025 for the USD denominated swingline, EUR denominated revolver, GBP denominated revolver, and CAD denominated revolver were as follows: $17.7 million, $271.2 million, $45.1 million, and $455.1 million.