v3.26.1
Debt and Financing Arrangements (Details) - USD ($)
$ in Millions
Apr. 30, 2026
Apr. 30, 2025
Long-term debt    
Debt instrument face amount $ 6,603.2 $ 7,103.2
Total long-term debt [1] 6,542.8 7,036.8
Current portion of long-term debt [1] 150.0 0.0
Long-term debt, less current portion [1] $ 6,392.8 $ 7,036.8
3.38% Senior Notes due December 15, 2027    
Long-term debt    
Interest rate on notes 3.38% 3.38%
Debt instrument face amount $ 500.0 $ 500.0
Senior Notes [1] $ 499.3 $ 498.9
5.90% Senior Notes due November 15, 2028    
Long-term debt    
Interest rate on notes 5.90% 5.90%
Debt instrument face amount $ 750.0 $ 750.0
Senior Notes [1] $ 746.9 $ 745.7
2.38% Senior Notes due March 15, 2030    
Long-term debt    
Interest rate on notes 2.38% 2.38%
Debt instrument face amount $ 500.0 $ 500.0
Senior Notes [1] $ 498.1 $ 497.7
2.13% Senior Notes due March 15, 2032    
Long-term debt    
Interest rate on notes 2.13% 2.13%
Debt instrument face amount $ 364.5 $ 364.5
Senior Notes [1] $ 361.8 $ 361.3
6.20% Senior Notes due November 15, 2033    
Long-term debt    
Interest rate on notes 6.20% 6.20%
Debt instrument face amount $ 1,000.0 $ 1,000.0
Senior Notes [1] $ 993.3 $ 992.4
4.25% Senior Notes due March 15, 2035    
Long-term debt    
Interest rate on notes 4.25% 4.25%
Debt instrument face amount $ 650.0 $ 650.0
Senior Notes [1] $ 646.3 $ 645.9
2.75% Senior Notes due September 15, 2041    
Long-term debt    
Interest rate on notes 2.75% 2.75%
Debt instrument face amount $ 177.5 $ 177.5
Senior Notes [1] $ 176.2 $ 176.1
6.50% Senior Notes due November 15, 2043    
Long-term debt    
Interest rate on notes 6.50% 6.50%
Debt instrument face amount $ 750.0 $ 750.0
Senior Notes [1] $ 737.9 $ 737.2
4.38% Senior Notes due March 15, 2045    
Long-term debt    
Interest rate on notes 4.38% 4.38%
Debt instrument face amount $ 600.0 $ 600.0
Senior Notes [1] $ 589.8 $ 589.2
3.55% Senior Notes due March 15, 2050    
Long-term debt    
Interest rate on notes 3.55% 3.55%
Debt instrument face amount $ 161.2 $ 161.2
Senior Notes [1] $ 159.4 $ 159.3
6.50% Senior Notes due November 15, 2053    
Long-term debt    
Interest rate on notes 6.50% 6.50%
Debt instrument face amount $ 1,000.0 $ 1,000.0
Senior Notes [1] 983.8 983.2
Term Loan Credit Agreement Due March 5, 2027    
Long-term debt    
Debt instrument face amount 150.0 650.0
Senior Notes [1] 150.0 649.9
Current portion of long-term debt    
Long-term debt    
Debt instrument face amount 150.0 0.0
Total long-term debt, less current portion    
Long-term debt    
Debt instrument face amount $ 6,453.2 $ 7,103.2
[1] Represents the carrying amount included in the Consolidated Balance Sheets, which includes the impact of capitalized debt issuance costs, offering discounts, and terminated interest rate contracts.