Employee Termination Benefits and Other Charges - Schedule of Employee Termination Benefits and Other Charges (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Dec. 28, 2012
Severance And Other Charges [Line Items]
Accrual, Beginning Balance	$ 19	$ 16
Charges	41	26	67
Cash payments	(24)	(23)
Non-cash charges	(15)
Accrual, Ending Balance	21	19	21
employee termination benefits [Member]
Severance And Other Charges [Line Items]
Accrual, Beginning Balance	3	0
Charges	26	25
Cash payments	(13)	(22)
Non-cash charges	(3)
Accrual, Ending Balance	13	3	13
Impairment of Assets [Member]
Severance And Other Charges [Line Items]
Accrual, Beginning Balance	0	0
Charges	12	0
Cash payments	0	0
Non-cash charges	(12)
Accrual, Ending Balance	0	0	0
Contract Termination [Member]
Severance And Other Charges [Line Items]
Accrual, Beginning Balance	16	16
Charges	3	1
Cash payments	(11)	(1)
Non-cash charges	0
Accrual, Ending Balance	$ 8	$ 16	$ 8