Earnings Per Share and Certain Related Information (Details) - USD ($) $ / shares in Units, shares in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 23, 2015	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
Diluted:
Basic weighted average shares outstanding		119,484	120,216	119,416	120,554
Dilutive potential common shares		2,230	927	2,385	1,000
Diluted weighted average shares outstanding		121,714	121,143	121,801	121,554
Antidilutive stock options and restricted stock		120	3,714	148	3,651
Shares of common stock issued from the exercise of stock options and the release of restricted stock		281	228	1,367	515
Share Repurchases
Amount authorized to be repurchased	$ 500,000,000
Average cost per share repurchased ($ per share)	$ 48.15
Number of shares repurchased (in shares)	4,854