PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Plan Assets (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jul. 01, 2016	Jul. 03, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	$ 4,115	$ 3,503
Investments Measured at NAV	920	987
Receivables/(Payables), net	98	(1)
Total fair value of plan assets	5,133	4,489	$ 4,757
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,062	1,097
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	838	455
Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	489	664
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	242	329
Commodities and real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	33	36
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	611	557
Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	241	166
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	2	2
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	597	197
Equity fund
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at NAV	632	582
Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at NAV	288	405
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,867	1,553
Level 1 | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,032	1,070
Level 1 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	834	452
Level 1 | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Commodities and real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1	31
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	1,482	966
Level 2 | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	30	27
Level 2 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	4	3
Level 2 | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 2 | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	47
Level 2 | Commodities and real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 2 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	611	557
Level 2 | Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	241	166
Level 2 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	596	166
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	766	984
Total fair value of plan assets	766	984	1,427
Level 3 | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 3 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 3 | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	489	664
Level 3 | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	242	282
Total fair value of plan assets	242	282	338
Level 3 | Commodities and real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	33	36
Level 3 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 3 | Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	0	0
Level 3 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	2	2
Total fair value of plan assets	2	2	$ 13
Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, gross	$ 0	$ 0