PENSION AND OTHER POSTRETIREMENT BENEFITS - Pre-tax Amounts Recorded in Other Comprehensive Loss (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jul. 01, 2016
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 234	$ 557
Net prior service cost (credit)	1	2
Pre-tax amounts recorded within accumulated other comprehensive loss	235	559
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	262	546
Net prior service cost (credit)	2	3
Pre-tax amounts recorded within accumulated other comprehensive loss	264	549
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(28)	11
Net prior service cost (credit)	(1)	(1)
Pre-tax amounts recorded within accumulated other comprehensive loss	$ (29)	$ 10