Current and long-term obligations (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Sep. 30, 2024	Feb. 02, 2024	Jun. 07, 2023
Current and long-term obligations
Other	$ 181,076		$ 200,418
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term obligations		Long-term obligations
Debt issuance costs, net	$ (36,724)		$ (41,527)
Current and long-term obligations	6,238,488		7,000,184
Less: current portion	(519,463)		(768,645)
Long-term obligations	5,719,025		6,231,539
Revolving Facility
Current and long-term obligations
Long-term obligations	0
4.250% Senior Notes due September 20, 2024
Current and long-term obligations
Long-term obligations			$ 749,770
Stated interest rate (as a percent)		4.25%	4.25%
Discount on debt issuance	0		$ 230
4.150% Senior Notes due Nov 1, 2025
Current and long-term obligations
Long-term obligations	$ 499,929		$ 499,838
Stated interest rate (as a percent)	4.15%		4.15%
Discount on debt issuance	$ 71		$ 162
3.875% Senior Notes due April 15, 2027
Current and long-term obligations
Long-term obligations	$ 599,888		$ 599,840
Stated interest rate (as a percent)	3.875%		3.875%
Discount on debt issuance	$ 112		$ 160
4.625% Senior Notes Due Nov 1, 2027
Current and long-term obligations
Long-term obligations	$ 549,700		$ 549,600
Stated interest rate (as a percent)	4.625%		4.625%
Discount on debt issuance	$ 300		$ 400
4.125% Senior Notes due May 1, 2028
Current and long-term obligations
Long-term obligations	$ 499,816		$ 499,763
Stated interest rate (as a percent)	4.125%		4.125%
Discount on debt issuance	$ 184		$ 237
5.200% Senior Notes due July 5, 2028
Current and long-term obligations
Long-term obligations	$ 499,901		$ 499,876
Stated interest rate (as a percent)	5.20%		5.20%	5.20%
Discount on debt issuance	$ 99		$ 124	$ 100
3.500% Senior Notes due April 3, 2030
Current and long-term obligations
Long-term obligations	$ 953,108		$ 951,240
Stated interest rate (as a percent)	3.50%		3.50%
Discount on debt issuance	$ 376		$ 441
5.000% Senior Notes due Nov 1, 2032
Current and long-term obligations
Long-term obligations	$ 698,045		$ 697,845
Stated interest rate (as a percent)	5.00%		5.00%
Discount on debt issuance	$ 1,955		$ 2,155
5.450% Senior Notes due July 5, 2033
Current and long-term obligations
Long-term obligations	$ 998,604		$ 998,479
Stated interest rate (as a percent)	5.45%		5.45%	5.45%
Discount on debt issuance	$ 1,396		$ 1,521	$ 1,600
4.125% Senior Notes due April 3, 2050
Current and long-term obligations
Long-term obligations	$ 495,429		$ 495,330
Stated interest rate (as a percent)	4.125%		4.125%
Discount on debt issuance	$ 4,571		$ 4,670
5.500% Senior Notes due Nov 1, 2052
Current and long-term obligations
Long-term obligations	$ 299,716		$ 299,712
Stated interest rate (as a percent)	5.50%		5.50%
Discount on debt issuance	$ 284		$ 288