PENSION AND OTHER POSTRETIREMENT BENEFITS - Reconciliation of Defined Benefit Plan Asset Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jul. 01, 2016
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	$ 4,489	$ 4,757
Plan assets at end of fiscal year	5,133	4,489
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	984	1,427
Realized gains (losses), net	55	229
Unrealized gains (losses), net	(22)	(281)
Sales, net	(251)	(391)
Plan assets at end of fiscal year	766	984
Private Equity Funds, Commodities and Real Estate | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	700	931
Realized gains (losses), net	78	109
Unrealized gains (losses), net	(71)	(121)
Sales, net	(185)	(219)
Plan assets at end of fiscal year	522	700
Hedge funds | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	282	338
Realized gains (losses), net	(23)	(8)
Unrealized gains (losses), net	49	(20)
Sales, net	(66)	(28)
Plan assets at end of fiscal year	242	282
International Equities | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	0	145
Realized gains (losses), net	0	127
Unrealized gains (losses), net	0	(137)
Sales, net	0	(135)
Plan assets at end of fiscal year	0	0
Other | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	2	13
Realized gains (losses), net	0	1
Unrealized gains (losses), net	0	(3)
Sales, net	0	(9)
Plan assets at end of fiscal year	$ 2	$ 2