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NON-OPERATING INCOME (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 14, 2020 | Dec. 16, 2019 | Jun. 29, 2018 | Dec. 29, 2017 | Jan. 03, 2020 | Jan. 01, 2021 | Jun. 28, 2019 | Jun. 29, 2018 | Dec. 16, 2020 | Nov. 27, 2019 | Jun. 22, 2018
Nonoperating Income (Expense) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Pension adjustment |  |  |  |  | $ 172,000,000 | $ 389,000,000 | $ 186,000,000 | $ 184,000,000 |  |  |
Gain on pension plan curtailment |  |  |  |  | 23,000,000 | 0 | 0 | 0 |  |  |
Gain (loss) on extinguishment of debt |  |  |  |  | (2,000,000) | 2,000,000 | 0 | (24,000,000) |  |  |
Other |  |  |  |  | (1,000,000) | 10,000,000 | 2,000,000 | (4,000,000) |  |  |
Total non-operating income |  |  |  |  | 192,000,000 | $ 401,000,000 | $ 188,000,000 | 156,000,000 |  |  |
Floating-rate notes |  |  |  |  |  |  |  |  |  |  |
Nonoperating Income (Expense) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  | $ (22,000,000) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  |  |  |  |  |  |  |  | $ 400,000,000 |
Floating-rate notes | 4.95% notes due February 15, 2021 (“4.95% 2021 Notes”) |  |  |  |  |  |  |  |  |  |  |
Nonoperating Income (Expense) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt | $ 2,000,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  |  |  | $ 650,000,000 |  |  |  |  |  |
Debt interest rate |  |  |  |  | 4.95% | 4.95% |  |  |  |  |
Repayment of debt | $ 650,000,000 |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 650,000,000 | $ 0 |  |  |  |  |
Floating-rate notes | 2.7% notes, due April 27, 2020 |  |  |  |  |  |  |  |  |  |  |
Nonoperating Income (Expense) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  |  |  | (2,000,000) |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  |  |  | $ 400,000,000 |  |  |  | $ 400,000,000 |  |
Debt interest rate |  |  |  |  | 2.70% |  |  |  | 2.70% |  |
Repayment of debt |  | $ 403,000,000 |  |  |  |  |  |  |  |  |
Floating-rate notes | 4.4% 2020 notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  | $ 800,000,000 |  |  |  |  | $ 800,000,000 |  |  | $ 400,000,000
Debt interest rate |  |  |  |  |  |  |  |  |  |  | 4.40%
Variable-rate debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 250,000,000 | $ 250,000,000 |  |  |  |  |
Variable-rate debt | Term loan, 5-year tranche, due May 29, 2020 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayment of debt |  |  |  | $ 253,000,000 |  |  |  |  |  |  |
Term of senior unsecured revolving credit agreement |  |  |  | 5 years |  |  |  | 5 years |  |  |
Debt |  |  |  | $ 1,300,000,000 |  |  |  |  |  |  |

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