Earnings per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Numerator:
Net income	$ 124,864	$ 137,481	$ 245,488	$ 237,786
Denominator:
Weighted average common shares for basic earnings per share	137,702	136,776	137,558	138,772
Net effect of dilutive stock option, incentive and performance share awards	2,442	1,799	2,376	2,195
Weighted average common shares for diluted earnings per share	140,144	138,575	139,934	140,967
Basic earnings per share	$ 0.91	$ 1.01	$ 1.78	$ 1.71
Diluted earnings per share	$ 0.89	$ 0.99	$ 1.75	$ 1.69