Fair Value of Financial Instruments and Long Term Debt - Carrying Value of Long-term Debt (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2025 USD ($) installment_payment	Apr. 30, 2024 USD ($) installment_payment	Oct. 04, 2024
Debt Instrument
Finance lease obligations	$ 108,920	$ 101,818
Long-term debt	2,405,375
Debt issuance costs	(5,750)	(1,379)
Total	2,508,545	1,635,939
Less current maturities	94,925	53,181
Long-term debt and finance lease obligations, net of current maturities	$ 2,413,620	$ 1,582,758
Senior Notes | 3.67% Senior Notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028
Debt Instrument
Interest rate	3.67%	3.67%
Number of payments | installment_payment	7	7
Long-term debt	$ 87,000	$ 111,000
Senior Notes | 3.75% Senior Notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028
Debt Instrument
Interest rate	3.75%	3.75%
Number of payments | installment_payment	7	7
Long-term debt	$ 29,000	$ 37,000
Senior Notes | 3.65% Senior Notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031
Debt Instrument
Interest rate	3.65%	3.65%
Number of payments | installment_payment	7	7
Long-term debt	$ 50,000	$ 50,000
Senior Notes | 3.72% Senior Notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031
Debt Instrument
Interest rate	3.72%	3.72%
Number of payments | installment_payment	7	7
Long-term debt	$ 50,000	$ 50,000
Senior Notes | 3.51% Senior Notes (Series E) due June 13, 2025
Debt Instrument
Interest rate	3.51%
Long-term debt	$ 0	150,000
Senior Notes | 3.77% Senior Notes (Series F) due August 22, 2028
Debt Instrument
Interest rate	3.77%
Long-term debt	$ 250,000	250,000
Senior Notes | 2.85% Senior Notes (Series G) due August 7, 2030
Debt Instrument
Interest rate	2.85%
Long-term debt	$ 325,000	325,000
Senior Notes | 2.96% Senior Notes (Series H) due August 6, 2032
Debt Instrument
Interest rate	2.96%
Long-term debt	$ 325,000	325,000
Senior Notes | Series I Senior Notes
Debt Instrument
Interest rate	5.23%		5.23%
Long-term debt	$ 150,000	0
Senior Notes | Series J Senior Notes
Debt Instrument
Interest rate	5.43%		5.43%
Long-term debt	$ 100,000	0
Line of Credit | Term Loan Facility
Debt Instrument
Long-term debt	200,000	237,500
Line of Credit | Incremental Term Loan Facility
Debt Instrument
Long-term debt	$ 839,375	$ 0