External financing (Details Textuals) (USD $)		3 Months Ended			12 Months Ended
	Jun. 29, 2013	Dec. 29, 2012 Notes Due 2022 [Member]	Jun. 29, 2013 Notes Due 2022 [Member]	Jun. 30, 2012 Notes Due 2022 [Member]	Jun. 29, 2013 Credit Agreement [Member]	Jun. 30, 2012 Credit Agreement [Member]	Jun. 29, 2013 Bank Credit Facilities [Member]	Jun. 30, 2012 Bank Credit Facilities [Member]
Debt Instrument [Line Items]
Weighted average interest rate on bank credit facilities							4.30%	6.10%
Senior note issued		$ 350,000,000	$ 350,000,000	$ 0
Interest rate of senior notes		4.875%	4.875%	0.00%
Debt Instrument, Maturity Date		Dec. 01, 2022
Proceeds from Issuance of Debt		349,258,000
Payments of Financing Costs		2,275,000
Line of Credit Facility Term					5 years
Line of Credit Facility, Maximum Borrowing Capacity					1,000,000,000
Line of Credit Facility Expiration Date					Nov. 18, 2016
Line of Credit Facility, Amount Outstanding					6,700,000	110,072,000
Letters of Credit Outstanding, Amount					2,309,000	17,202,000
External financing [Abstract]
Company's debt, carrying value	2,045,183,000
Company's debt, fair value	$ 2,130,294,000