Employee Termination, Asset Impairment and Other Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jan. 02, 2015	Oct. 03, 2014	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Jun. 27, 2014
Employee Termination, Asset Impairment and Other Charges [Line Items]
Severance And Other Charges Reserve	$ 33	$ 8		$ 33		$ 0
Employee termination, asset impairment and other charges	53		23	62	34
Severance And Other Charges Reserve Settled With Cash	9
Employee Termination Benefits Charge	53	9
Severance And Other Charges Reserve Settled Without Cash	(19)	(1)
Employee Termination Benefits [Member]
Employee Termination, Asset Impairment and Other Charges [Line Items]
Severance And Other Charges Reserve	33	8		33		0
Severance And Other Charges Reserve Settled With Cash	9
Employee Termination Benefits Charge	34	8
Severance And Other Charges Reserve Settled Without Cash	0	0
Impairment Of Property Plant And Equipment [Member]
Employee Termination, Asset Impairment and Other Charges [Line Items]
Severance And Other Charges Reserve	0	0		0		0
Severance And Other Charges Reserve Settled With Cash	0
Employee Termination Benefits Charge	19	1
Severance And Other Charges Reserve Settled Without Cash	$ (19)	$ (1)