Funded Status of Postretirement Health-Care and Life Insurance Plans (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Beginning of year	$ 1,562	$ 1,680
Service cost	9	11
Postretirement Medical, Interest Cost	74	70
Net benefits paid	76	81
Postretirement Medical Defined Benefit Plan, Actuarial Gain (Loss)	116	(123)
End of year	1,685	1,562
Fair value of plan assets	1,565	1,439	1,515
Postretirement Medical Defined Benefit Plan, Funded Status of Plan	(120)	(123)
Accrued liabilities	4	5
Postretirement Medical Other liabilities	116	119
Unamortized prior service credit	6	7
Unamortized net actuarial loss	237	228
Total	243	235
Net Periodic Benefit Cost and Funded Status [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	(2)	(3)	(3)
Postretirement Medical, Interest Cost	4	4	3
Defined Benefit Plan, Curtailments	(1)	0	0
Postretirement Medical And Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Beginning of year	90	101
Service cost	2	3
Postretirement Medical, Interest Cost	4	4
Net benefits paid	(6)	(5)
Plan participant contributions	1	1
Defined Benefit Plan, Curtailments	(1)	0
Postretirement Medical Defined Benefit Plan, Actuarial Gain (Loss)	(1)	(14)
End of year	89	90
Fair value of plan assets	0	1
Postretirement Medical Defined Benefit Plan, Funded Status of Plan	(89)	(89)
Accrued liabilities	(6)	(6)
Postretirement Medical Other liabilities	(83)	(83)
Total liability recognized	(89)	(89)
Unamortized prior service credit	(12)	(20)
Unamortized net actuarial loss	8	10
Total	$ (4)	$ (10)