PENSION AND OTHER POSTRETIREMENT BENEFITS - Reconciliation of Defined Benefit Plan Asset Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	$ 5,305	$ 5,133
Plan assets at end of fiscal year	5,159	5,305
Other
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	2
Plan assets at end of fiscal year	2	2
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	13	2
Purchases, net	5	11
Unrealized gains, net	1
Plan assets at end of fiscal year	19	13
Level 3 | Fixed income funds
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	11	0
Purchases, net	5	11
Unrealized gains, net	1
Plan assets at end of fiscal year	17	11
Level 3 | Other
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at beginning of fiscal year	2	2
Purchases, net	0	0
Unrealized gains, net	0
Plan assets at end of fiscal year	$ 2	$ 2