Debt and Financing Arrangements (Details) - USD ($) $ in Millions		Oct. 31, 2025	Apr. 30, 2025
Long-term debt
Debt instrument face amount		$ 7,103.2	$ 7,103.2
Total long-term debt	[1]	7,039.8	7,036.8
Long-term debt		$ 7,039.8	$ 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]	$ 499.1	$ 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]	$ 746.3	$ 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]	$ 497.9	$ 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]	$ 361.6	$ 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]	$ 992.9	$ 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]	$ 646.2	$ 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]	$ 176.1	$ 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]	$ 737.5	$ 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]	$ 589.5	$ 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]	$ 159.3	$ 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]	983.5	983.2
Term Loan Credit Agreement due 2027
Long-term debt
Debt instrument face amount		650.0	650.0
Senior Notes	[1]	$ 649.9	$ 649.9

[1] Represents the carrying amount included in the Condensed Consolidated Balance Sheets, which includes the impact of capitalized debt issuance costs, offering discounts, and terminated interest rate contracts.