Defined Benefit Pension Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended														0 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013 Corporate Debt Securities [Member]	Jun. 29, 2013 U.S. Pooled Funds [Member]	Jun. 29, 2013 Non-U.S. Pooled Funds [Member]	Jun. 29, 2013 Bond Fund [Member]	Jun. 29, 2013 Real Estate	Jun. 29, 2013 Other Assest Category [Member]	Jun. 30, 2012 North American Fresh Bakery	Jun. 29, 2013 Canadian Pension Plans [Member]	Jun. 28, 2014 Pension Plans, Defined Benefit	Jun. 29, 2013 Pension Plans, Defined Benefit	Jun. 30, 2012 Pension Plans, Defined Benefit	Nov. 04, 2011 Pension Plans, Defined Benefit North American Fresh Bakery
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments [Abstract]
Settlement gain (loss)										$ (36)		$ 1	$ 6	$ 1	$ (36)
Defined Benefit Plan, Actuarial Gain (Loss)	(116)	123									(1)
Payout of Surplus of Plan Assets in an Overfunded Position		(4)
Remaining settlement loss due to lump sum payments		1
Defined Benefit Plan, Net Periodic Benefit Cost												(2)	0	1
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)												(1)
Defined Benefit Plan, Future Amortization of Gain (Loss)												(4)
Increase in Plan Assets	126
Defined Benefit Plan, Funded Status of Plan [Abstract]
Defined Benefit Plan, Funded Status of Plan	(120)	(123)
Increase (Decrease) in Pension Plan Obligations	123
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Future plan benefit payments 2015												74
Future plan benefit payments 2016												78
Future plan benefit payments 2017												81
Future plan benefit payments 2018												84
Future plan benefit payments 2019												86
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter												473
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	5
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers				503	122	5	324	23	13
Defined Contribution Plan, Cost Recognized	16	25	21
Multiemployer Plans [Abstract]
Multiemployer Plans Withdrawal liability	5.00%
Multiemployer Plan, Period Contributions	1	1	2
Defined Benefit Plan, Benefit Obligation	$ 1,685	$ 1,562	$ 1,680