Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
	Sep. 28, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010
Quarterly Financial Data [Line Items]
Total revenues	$ 756,100,000	$ 705,300,000	$ 720,300,000	$ 625,300,000	$ 719,000,000	$ 649,400,000	$ 648,400,000	$ 579,900,000	$ 2,807,015,000	$ 2,596,666,000	$ 2,356,585,000
Gross margin	323,200,000	307,600,000	296,700,000	268,800,000	300,300,000	279,800,000	289,000,000	266,800,000	1,196,336,000	1,135,889,000	1,025,642,000
Net earnings from continuing operations	120,200,000	108,800,000	107,800,000	90,200,000	110,400,000	98,600,000	103,100,000	96,500,000	427,049,000	408,626,000	367,481,000
Net loss from discontinued operations	0	0	0	0	(9,700,000)	0	0	0	0	(9,693,000)	(7,059,000)
Net earnings	$ 120,200,000	$ 108,800,000	$ 107,800,000	$ 90,200,000	$ 100,700,000	$ 98,600,000	$ 103,100,000	$ 96,500,000	$ 427,049,000	$ 398,933,000	$ 360,422,000
Net earnings (loss) per share-basic:
Continuing operations	$ 1.09	$ 0.98	$ 0.96	$ 0.80	$ 0.97	$ 0.84	$ 0.87	$ 0.82	$ 3.83	$ 3.50	$ 3.02
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.09)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.08)	$ (0.06)
Net earnings per share	$ 1.09	$ 0.98	$ 0.96	$ 0.80	$ 0.88	$ 0.84	$ 0.87	$ 0.82	$ 3.83	$ 3.42	$ 2.96
Net earnings (loss) per share-diluted:
Continuing operations	$ 1.08	$ 0.96	$ 0.94	$ 0.79	$ 0.95	$ 0.83	$ 0.86	$ 0.80	$ 3.76	$ 3.44	$ 2.96
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.08)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.08)	$ (0.05)
Net earnings per share	$ 1.08	$ 0.96	$ 0.94	$ 0.79	$ 0.87	$ 0.83	$ 0.86	$ 0.80	$ 3.76	$ 3.36	$ 2.91