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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

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