Schedule of Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Quarterly Financial Data [Line Items]
Total revenues	$ 769,900	$ 726,200	$ 768,400	$ 678,400	$ 756,100	$ 705,300	$ 720,300	$ 625,300	$ 2,942,897	$ 2,807,015	$ 2,596,666
Gross margin	328,500	310,500	319,600	291,100	323,200	307,600	296,700	268,800	1,249,687	1,196,336	1,135,889
Net earnings	$ 117,300	$ 112,800	$ 112,800	$ 95,300	$ 120,200	$ 108,800	$ 107,800	$ 90,200	$ 438,248	$ 427,049	$ 398,933
Net earnings per share – basic:	$ 1.09	$ 1.04	$ 1.04	$ 0.87	$ 1.09	$ 0.98	$ 0.96	$ 0.80	$ 4.04	$ 3.83	$ 3.42
Net earnings per share – diluted:	$ 1.08	$ 1.03	$ 1.02	$ 0.86	$ 1.08	$ 0.96	$ 0.94	$ 0.79	$ 3.98	$ 3.76	$ 3.36