Debt and Financing Arrangements (Details) - USD ($) $ in Millions		Apr. 30, 2025	Apr. 30, 2024
Long-term debt
Debt instrument face amount		$ 7,103.2	$ 7,850.0
Total long-term debt	[1]	7,036.8	7,773.0
Current portion of long-term debt	[1]	0.0	999.3
Long-term debt, less current portion	[1]	$ 7,036.8	$ 6,773.7
3.50% Senior Notes due March 15, 2025
Long-term debt
Interest rate on notes		3.50%	3.50%
Debt instrument face amount		$ 0.0	$ 1,000.0
Senior Notes	[1]	$ 0.0	$ 999.3
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]	$ 498.9	$ 498.4
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]	$ 745.7	$ 744.5
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]	$ 497.7	$ 497.2
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	$ 500.0
Senior Notes	[1]	$ 361.3	$ 495.2
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]	$ 992.4	$ 991.5
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]	$ 645.9	$ 645.5
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	$ 300.0
Senior Notes	[1]	$ 176.1	$ 297.4
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]	$ 737.2	$ 736.5
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]	$ 589.2	$ 588.7
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	$ 300.0
Senior Notes	[1]	$ 159.3	$ 296.2
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]	983.2	982.6
Term Loan Credit Agreement Due March 5, 2027
Long-term debt
Debt instrument face amount		650.0	0.0
Senior Notes	[1]	649.9	0.0
Current portion of long-term debt
Long-term debt
Debt instrument face amount		0.0	1,000.0
Total long-term debt, less current portion
Long-term debt
Debt instrument face amount		$ 7,103.2	$ 6,850.0

[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.