Shareholders' equity (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2011	Jan. 01, 2011
Comprehensive income
Net income	$ 147,023,000	$ 141,034,000	$ 286,053,000	$ 279,208,000
Foreign currency translation adjustments	(96,211,000)	(42,099,000)	(282,469,000)	133,553,000
Total comprehensive income	50,812,000	98,935,000	3,584,000	412,761,000
Shareholders' equity (Textuals) [Abstract]
Authorized repurchase of common stock under Share Repurchase Program			500,000,000
Shares repurchased during period			8,060,000
Average market price per shares repurchased during period			$ 28.01
Cost of repurchase			$ 225,937,000