Income Taxes - Total Amounts of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jun. 28, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit at beginning of period	$ 300	$ 240	$ 280
Gross increases related to current year tax positions	44	27	29
Gross increases related to prior year tax positions	6	26	10
Gross decreases related to prior year tax positions	0	(5)	(8)
Settlements	0	0	(64)
Lapse of statute of limitations	(3)	0	(7)
Increases as a result of acquisitions	3	12	0
Unrecognized tax benefit at end of period	350	$ 300	$ 240
Minimum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Estimated additional federal tax expense as a result of examination	72
Maximum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Estimated additional federal tax expense as a result of examination	$ 723