External financing (Details Textuals) (USD $)	12 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
Debt Instrument [Line Items]
Company's debt, carrying value	$ 2,080,000,000	$ 2,050,000,000
Company's debt, fair value	2,190,000,000	2,130,000,000
Bank Credit Facilities [Member]
Debt Instrument [Line Items]
Weighted average interest rate on bank credit facilities	3.20%	4.30%
2012 Credit Facility [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility term	5 years
Maximum borrowing capacity	1,000,000,000
Expiration date	Nov. 18, 2016
Outstanding amount	2,000,000	2,300,000
2014 Credit Facility [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	1,250,000,000
Line of Credit Facility, Increase (Decrease), Net	1,500,000,000
2014 Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 150,000,000