Annual report [Section 13 and 15(d), not S-K Item 405]

Long-Term Financing (Schedule of Long-Term Debt, at Amortized Cost) (Details)

v3.25.2
Long-Term Financing (Schedule of Long-Term Debt, at Amortized Cost) (Details) - USD ($)
$ in Millions
May 31, 2025
May 31, 2024
Debt Instrument [Line Items]    
Total long-term debt $ 5,000.0 $ 800.0
Less: current portion, net of debt issuance costs (399.8) 0.0
Less: unamortized discount and debt issuance costs (51.8) (1.4)
Long-term debt, net $ 4,548.4 798.6
Senior Notes, Series A [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Effective interest rate 4.14%  
Total long-term debt $ 400.0 400.0
Senior Notes, Series B [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Effective interest rate 4.30%  
Total long-term debt $ 400.0 400.0
5-Year Fixed Rate Corporate Bonds [Member] | Corporate Bonds [Member]    
Debt Instrument [Line Items]    
Effective interest rate 5.36%  
Total long-term debt $ 1,500.0 0.0
7-Year Fixed Rate Corporate Bonds [Member] | Corporate Bonds [Member]    
Debt Instrument [Line Items]    
Effective interest rate 5.58%  
Total long-term debt $ 1,500.0 0.0
10-Year Fixed Rate Corporate Bonds [Member] | Corporate Bonds [Member]    
Debt Instrument [Line Items]    
Effective interest rate 5.84%  
Total long-term debt $ 1,200.0 $ 0.0