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PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Plan Assets (Details) - USD ($) $ in Millions | Jun. 28, 2019 | Jun. 29, 2018 | Jun. 30, 2017
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | $ 5,159 | $ 5,305 | $ 5,133
Receivables (payables), net | 84 | (4) |
Domestic equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 1,173 | 1,221 |
International equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 896 | 903 |
Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 923 | 811 |
Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 332 | 335 |
Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 2 | 2 |
Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 59 | 209 |
Total |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 3,385 | 3,481 |
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 2,081 | 2,094 |
Level 1 | Domestic equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 1,173 | 1,189 |
Level 1 | International equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 896 | 899 |
Level 1 | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 1 | Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 1 | Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 1 | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 12 | 6 |
Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 1,285 | 1,374 |
Level 2 | Domestic equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 32 |
Level 2 | International equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 4 |
Level 2 | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 906 | 800 |
Level 2 | Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 332 | 335 |
Level 2 | Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 2 | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 47 | 203 |
Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 19 | 13 | 2
Level 3 | Domestic equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 3 | International equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 3 | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 17 | 11 |
Level 3 | Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 3 | Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 2 | 2 | 2
Level 3 | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 0 | 0 |
Level 3 | Fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 17 | 11 | $ 0
Investments Measured at NAV |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 1,690 | 1,828 |
Investments Measured at NAV | Equity funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 703 | 714 |
Investments Measured at NAV | Fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 362 | 318 |
Investments Measured at NAV | Hedge funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | 331 | 395 |
Investments Measured at NAV | Private equity funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total fair value of plan assets | $ 294 | $ 401 |

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