Debt and Financing Arrangements (Details) - USD ($)		Jan. 31, 2023	Apr. 30, 2022
Long-term debt
Debt instrument face amount		$ 4,350,000,000	$ 4,350,000,000
Total long-term debt	[1]	$ 4,313,300,000	$ 4,310,600,000
3.50% Senior Notes due March 15, 2025
Long-term debt
Interest rate on notes		3.50%	3.50%
Debt instrument face amount		$ 1,000,000,000	$ 1,000,000,000
Senior Notes	[1]	$ 998,200,000	$ 997,600,000
3.38% Senior Notes due December 15, 2027
Long-term debt
Interest rate on notes		3.38%	3.38%
Debt instrument face amount		$ 500,000,000.0	$ 500,000,000.0
Senior Notes	[1]	$ 497,900,000	$ 497,600,000
2.38 % Senior Notes due March 15, 2030
Long-term debt
Interest rate on notes		2.38%	2.38%
Debt instrument face amount		$ 500,000,000.0	$ 500,000,000.0
Senior Notes	[1]	$ 496,600,000	$ 496,200,000
2.13% Senior Notes due March 15, 2032
Long-term debt
Interest rate on notes		2.13%	2.13%
Debt instrument face amount		$ 500,000,000.0	$ 500,000,000.0
Senior Notes	[1]	$ 494,300,000	$ 493,800,000
4.25% Senior Notes due March 15, 2035
Long-term debt
Interest rate on notes		4.25%	4.25%
Debt instrument face amount		$ 650,000,000.0	$ 650,000,000.0
Senior Notes	[1]	$ 645,000,000.0	$ 644,700,000
2.75% Senior Notes due September 15, 2041
Long-term debt
Interest rate on notes		2.75%	2.75%
Debt instrument face amount		$ 300,000,000.0	$ 300,000,000.0
Senior Notes	[1]	$ 297,200,000	$ 297,100,000
4.38% Senior Notes due March 15, 2045
Long-term debt
Interest rate on notes		4.38%	4.38%
Debt instrument face amount		$ 600,000,000.0	$ 600,000,000.0
Senior Notes	[1]	$ 588,000,000.0	$ 587,600,000
3.55% Senior Notes due March 15, 2050
Long-term debt
Interest rate on notes		3.55%	3.55%
Debt instrument face amount		$ 300,000,000.0	$ 300,000,000.0
Senior Notes	[1]	$ 296,100,000	$ 296,000,000.0

[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.