Earnings Per Share and Certain Related Information (Details)	3 Months Ended		6 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Mar. 30, 2012	Apr. 01, 2011
Earnings Per Share Reconciliation [Abstract]
Weighted average shares outstanding (denominator used to compute basic EPS) (in shares)	127,412,000	125,402,000	127,171,000	125,198,000
Effect of stock options and restricted stock (in shares)	1,314,000	1,961,000	1,176,000	1,846,000
Denominator used to compute diluted EPS (in shares)	128,726,000	127,363,000	128,347,000	127,044,000
Antidilutive stock options and restricted stock (in shares)	2,977,300	2,229,500	3,893,800	3,036,100
Shares of common stock issued from the exercise of stock options and the release of restricted stock (in shares)	929,300	722,800	1,490,200	1,071,700