CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net income	$ 861,853	$ 247,246
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, including amounts charged to cost of goods sold	69,476	63,180
Amortization, including amounts charged to interest expense	42,248	43,071
(Benefit) provision for doubtful accounts	(3,388)	312
(Benefit) provision for deferred income taxes	(840,479)	49,491
Share-based compensation	32,608	29,192
LIFO expense	0	28,308
Loss on early retirement of debt	23,766	0
Other	211	(13,152)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	91,624	(536,937)
Merchandise inventories	(460,127)	(713,553)
Prepaid expenses and other assets	(8,518)	57,046
Accounts payable	(59,223)	247,814
Income taxes payable	318,673	65,039
Accrued expenses and other liabilities	(58,398)	2,588
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	10,326	(430,355)
INVESTING ACTIVITIES
Capital expenditures	(73,641)	(137,282)
Cost of acquired companies, net of cash acquired	(70,330)	(1,497)
Proceeds from sales of investment securities available-for-sale	0	13,921
Purchases of investment securities available-for-sale	0	(33,879)
Other	1,648	1,880
NET CASH USED IN INVESTING ACTIVITIES	(142,323)	(156,857)
FINANCING ACTIVITIES
Senior notes borrowings	1,236,483	0
Senior notes and term loans repayments	(400,000)	(50,000)
Borrowings under revolving and securitization credit facilities	2,577,124	65,362
Repayments under revolving and securitization credit facilities	(2,569,414)	(67,491)
Payment of premium on early retirement of debt	(22,348)	0
Purchases of common stock	(22,496)	(229,928)
Exercises of stock options	29,574	10,229
Cash dividends on common stock	(83,555)	(80,169)
Tax withholdings related to restricted share vesting	(7,375)	(8,938)
Other	(3,364)	(2,551)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	734,629	(363,486)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	602,632	(950,698)
Cash and cash equivalents at beginning of period	2,435,115	2,741,832
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 3,037,747	$ 1,791,134