Supplemental Guarantor Condensed Consolidating Financials - Schedule of Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	$ 155,025	$ 111,731
INVESTING ACTIVITIES
Payment of additional acquisition consideration	(16,808)	(9,784)
Proceeds from sale of business, net	1,488
Proceeds from sale of intellectual property	60,000
Purchase of property and equipment	(11,233)	(6,790)
Increase in equipment under customer usage agreements	(11,214)	(7,886)
Purchase of insurance contracts	(4,000)
Purchase of cost method investments	(3,625)	(150)
(Increase) decrease in other assets	1,144	9
Decrease in restricted cash		9
Net cash provided by (used in) investing activities	15,752	(24,601)
FINANCING ACTIVITIES
Repayment of long-term debt	(16,250)
Payment of contingent consideration	(3,408)	(4,105)
Net proceeds from issuance of common stock pursuant to employee stock plans	12,777	1,627
Excess tax benefit related to equity awards	2,185	1,725
Payment of employee restricted stock minimum tax withholdings	(7,885)	(5,561)
Net cash used in financing activities	(12,581)	(6,314)
Effect of exchange rate changes on cash and cash equivalents	(155)	(66)
Net increase (decrease) in cash and cash equivalents	158,041	80,750
Cash and cash equivalents, beginning of period	560,430	712,332
Cash and cash equivalents, end of period	718,471	793,082
Parent Company [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	112,839	108,796
INVESTING ACTIVITIES
Payment of additional acquisition consideration	(16,808)	(9,784)
Purchase of property and equipment	(2,887)	(3,799)
Increase in equipment under customer usage agreements	(286)
Purchase of insurance contracts	(4,000)
Purchase of cost method investments	(3,400)
(Increase) decrease in other assets	(1,967)
Net cash provided by (used in) investing activities	(29,348)	(13,583)
FINANCING ACTIVITIES
Repayment of long-term debt	(16,250)
Payment of contingent consideration	(3,408)	(4,105)
Net proceeds from issuance of common stock pursuant to employee stock plans	12,777	1,627
Excess tax benefit related to equity awards	2,185	1,725
Payment of employee restricted stock minimum tax withholdings	(7,885)	(5,561)
Net cash used in financing activities	(12,581)	(6,314)
Net increase (decrease) in cash and cash equivalents	70,910	88,899
Cash and cash equivalents, beginning of period	210,028	644,697
Cash and cash equivalents, end of period	280,938	733,596
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	30,075	7,101
INVESTING ACTIVITIES
Proceeds from sale of intellectual property	60,000
Purchase of property and equipment	(6,037)	(1,500)
Increase in equipment under customer usage agreements	(7,172)	(5,558)
Purchase of cost method investments	(225)	(150)
(Increase) decrease in other assets	(478)
Net cash provided by (used in) investing activities	46,088	(7,208)
FINANCING ACTIVITIES
Effect of exchange rate changes on cash and cash equivalents	(2,387)	107
Net increase (decrease) in cash and cash equivalents	73,776
Cash and cash equivalents, beginning of period	269,416
Cash and cash equivalents, end of period	343,192
Non-Guarantor Subsidiaries [Member)
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	12,111	(4,166)
INVESTING ACTIVITIES
Proceeds from sale of business, net	1,488
Purchase of property and equipment	(2,309)	(1,491)
Increase in equipment under customer usage agreements	(3,756)	(2,328)
(Increase) decrease in other assets	3,589
Decrease in restricted cash		9
Net cash provided by (used in) investing activities	(988)	(3,810)
FINANCING ACTIVITIES
Effect of exchange rate changes on cash and cash equivalents	2,232	(173)
Net increase (decrease) in cash and cash equivalents	13,355	(8,149)
Cash and cash equivalents, beginning of period	80,986	67,635
Cash and cash equivalents, end of period	$ 94,341	$ 59,486