Pension and Other Postretirement Benefits (Details 8) - USD ($) $ in Millions	Jul. 03, 2015	Jun. 27, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	$ 4,761
Receivables (payables), net	(4)
Fair value of plan assets	4,757	$ 91
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,631
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,703
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,427
Fair value of plan assets	1,427	$ 0
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,560
Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,216
Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	344
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	801
International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	352
International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	304
International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	145
Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	886
Private equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	886
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	420
Hedge funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	33
Hedge funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	49
Hedge funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	338
Commodities and real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	45
Commodities and real estate | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	45
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	363
Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	363
Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	366
Government securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	366
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	84
Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	71
Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	13
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	236
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	30
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	$ 206