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Debt and Financing Arrangements (Tables)
 12 Months Ended
Apr. 30, 2023
Debt Disclosure [Abstract]  
Schedule of long-term debt
The following table summarizes the components of our long-term debt.
  April 30, 2023April 30, 2022
  Principal
Outstanding
Carrying Amount (A)
Principal
Outstanding
Carrying
 Amount (A)
3.50% Senior Notes due March 15, 2025
$1,000.0 $998.4 $1,000.0 $997.6 
3.38% Senior Notes due December 15, 2027
500.0 498.0 500.0 497.6 
2.38% Senior Notes due March 15, 2030
500.0 496.7 500.0 496.2 
2.13% Senior Notes due March 15, 2032
500.0 494.4 500.0 493.8 
4.25% Senior Notes due March 15, 2035
650.0 645.1 650.0 644.7 
2.75% Senior Notes due September 15, 2041
300.0 297.3 300.0 297.1 
4.38% Senior Notes due March 15, 2045
600.0 588.2 600.0 587.6 
3.55% Senior Notes due March 15, 2050
300.0 296.1 300.0 296.0 
Total long-term debt$4,350.0 $4,314.2 $4,350.0 $4,310.6 
(A)    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.