Earnings per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Numerator:
Net income	$ 86,196	$ 147,562	$ 323,982	$ 433,615
Denominator:
Weighted average common shares for basic earnings per share	137,102	145,126	138,215	148,195
Net effect of dilutive stock options and performance share awards	1,913	2,119	2,101	2,277
Weighted average common shares for diluted earnings per share	139,015	147,245	140,316	150,472
Basic earnings per share	$ 0.63	$ 1.02	$ 2.34	$ 2.93
Diluted earnings per share	$ 0.62	$ 1.00	$ 2.31	$ 2.88