Income Taxes - Schedule of Significant Components of Deferred Tax Liabilities (Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Components of Deferred Tax Assets and Liabilities [Abstract]
Inventories	$ 1,537,057	$ 1,475,467
Property and equipment	103,959	145,308
Goodwill and other intangible assets	1,143,962	1,242,466
Right-of-use assets	285,434	255,221
Other	31,416	51,490
Gross deferred tax liabilities	3,101,828	3,169,952
Net operating loss and tax credit carryforwards	(530,024)	(532,851)
Allowance for credit losses	(18,949)	(18,221)
Accrued expenses	(9,419)	(18,108)
Accrued litigation liability	(855,962)	(909,256)
Employee and retiree benefits	(26,960)	(22,927)
Goodwill and other intangible assets	(401,822)	(425,898)
Lease liabilities	(312,357)	(280,550)
Share-based compensation	(23,161)	(23,087)
Other	(128,136)	(119,180)
Gross deferred tax assets	(2,306,790)	(2,350,078)
Valuation allowance for deferred tax assets	602,361	637,403
Deferred tax assets, net of valuation allowance	(1,704,429)	(1,712,675)
Net deferred tax liabilities	$ 1,397,399	$ 1,457,277