PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Deferred Compensation Plans (Details) - Fair Value - USD ($) $ in Millions	Jan. 03, 2020	Jun. 28, 2019	Jun. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan assets	$ 87	$ 127	$ 136
Fair value of deferred compensation plan liabilities	71	157	149
Equity securities and mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan liabilities	2	25	38
Equity securities and mutual funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan liabilities	2	25	38
Common/collective trusts and guaranteed investment contracts | Investments Measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan liabilities	69	132	111
Equity and fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan assets	58	99	109
Equity and fixed income securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan assets	58	99	109
Corporate-owned life insurance | Investments Measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of deferred compensation plan assets	$ 29	$ 28	$ 27