Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013
OPERATING ACTIVITIES
Net income (loss)	$ 131.6	$ 17.3	$ (1,172.8)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	81.5	94.7	95.5
Amortization	409.9	428.5	420.5
Non-cash interest expense	63.8	68.7	81.2
Stock-based compensation expense	59.3	50.0	52.3
Excess tax benefit related to equity awards	(10.7)	(5.7)	(7.4)
Deferred income taxes	(148.8)	(243.1)	(198.0)
Gain on sale of intellectual property	0.0	0.0	53.9
Fair value adjustments to contingent consideration	0.0	0.0	11.3
Fair value write-up of inventory sold	0.0	0.0	52.4
Impairment of goodwill	0.0	0.0	1,117.4
Asset impairment charges	0.0	38.4	9.4
Debt extinguishment losses	(62.7)	(7.4)	(9.2)
Equity investment impairment charges	7.8	6.9	6.4
Loss on disposal of property and equipment	6.6	7.1	4.9
Loss on sale of businesses	9.6	5.5	0.0
Other adjustments and non-cash items	14.3	(11.8)	0.9
Changes in operating assets and liabilities:
Accounts receivable	(30.3)	7.9	4.1
Inventories	43.9	(44.7)	25.2
Prepaid income taxes	0.7	22.4	25.1
Prepaid expenses and other assets	5.7	17.3	0.9
Accounts payable	25.5	11.8	(6.4)
Accrued expenses and other liabilities	36.9	14.7	2.3
Deferred revenue	16.1	15.1	13.3
Net cash provided by operating activities	786.1	508.4	493.8
INVESTING ACTIVITIES
Acquisition of businesses, net of cash acquired	0.0	0.0	(6.3)
Payment of additional acquisition consideration	0.0	0.0	(16.8)
Net proceeds from sale of business	0.0	10.1	85.1
Purchase of property and equipment	48.1	44.3	(49.0)
Increase in equipment under customer usage agreements	41.3	35.9	(41.1)
Net (purchases) sales of insurance contracts	6.4	(13.8)	(4.0)
Purchases of mutual funds	0.0	(29.7)	0.0
Sales of mutual funds	10.0	22.4	0.0
Proceeds from sale of intellectual property	0.0	0.0	60.0
(Purchase) sale of a cost-method equity investment	0.0	0.0	(1.6)
Increase in other assets	0.3	3.4	(7.5)
Net cash (used in) provided by investing activities	(86.1)	(67.0)	18.8
FINANCING ACTIVITIES
Proceeds from long-term debt	2,495.1	0.0	0.0
Repayment of long-term debt	(3,095.0)	595.0	(265.0)
Repayments of Convertible Debt	(543.7)	0.0	0.0
Proceeds from Lines of Credit	358.0	0.0	0.0
Repayments of Lines of Credit	(183.0)	0.0	0.0
Payment of debt issuance costs	(22.7)	2.4	(9.4)
Interest Rate Cap Agreements Aggregate Premium Payable	(13.2)	0.0	0.0
Payment of contingent consideration	0.0	0.0	(43.0)
Payment of deferred acquisition consideration	0.0	5.0	(1.6)
Net proceeds from issuance of common stock pursuant to employee stock plans	70.0	81.4	75.1
Excess tax benefit related to equity awards	10.7	5.7	7.4
Payment of minimum tax withholdings on net share settlements of equity awards	12.9	9.8	(12.3)
Net cash used in financing activities	(936.7)	(525.1)	(248.8)
Effect of exchange rate changes on cash and cash equivalents	(8.1)	(2.7)	(1.7)
Net (decrease) increase in cash and cash equivalents	(244.8)	(86.4)	262.1
Cash and cash equivalents, beginning of period	736.1	822.5	560.4
Cash and cash equivalents, end of period	$ 491.3	$ 736.1	$ 822.5