Computation of Net Basic and Diluted Earnings Per Share (Detail) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	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
Earnings Per Share [Line Items]
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
Loss from discontinued operations, net of taxes	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
Weighted average shares outstanding-basic									111,376	116,703	121,816
Dilutive effect of potential common shares									2,097	2,032	2,209
Weighted average shares outstanding-diluted									113,473	118,735	124,025
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