Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Cash flows from operating activities:
Net income	$ 70.4	$ 257.8
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	25.8	21.6
Depreciation	63.6	55.3
Amortization of intangible assets	5.5	8.5
Deferred income taxes	21.4	1.2
Excess tax benefit from share-based compensation	0.0	(21.5)
Changes in assets and liabilities net of acquired balances:
Receivables, net	(4.1)	49.3
Inventory	34.5	0.6
Other current and long-term assets	(20.6)	12.3
Accounts payable	(105.4)	50.9
Other current and long-term liabilities	269.7	59.9
Net cash provided by operating activities	360.8	495.9
Cash flows from investing activities:
Capital expenditures	(28.2)	(50.1)
Payments for acquisitions, net of cash acquired	0.0	(13.7)
Purchased intangibles	(6.0)	0.0
Maturity of investments	0.0	3.2
Net cash used in investing activities	(34.2)	(60.6)
Cash flows from financing activities:
Excess tax benefit from share-based compensation	0.0	21.5
Repurchase of common stock - payroll tax withholdings on equity awards	(44.7)	(44.4)
Repurchase of common stock - stock repurchase program	(172.5)	(106.5)
Dividends paid	(59.1)	(52.2)
Net proceeds from exercise of stock options	14.4	14.7
Payments of contingent consideration	0.0	(1.7)
Net cash used in financing activities	(261.9)	(168.6)
Net increase in cash and cash equivalents	64.7	266.7
Cash and cash equivalents at beginning of period	1,616.8	1,083.8
Cash and cash equivalents at end of period	1,681.5	1,350.5
Supplemental cash flow disclosures:
Income taxes paid	$ 7.2	$ 2.5