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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 03, 2020 USD ($) | Jun. 28, 2019 USD ($) | Jun. 29, 2018 USD ($) | Jun. 30, 2017 USD ($) | Nov. 27, 2019 USD ($) | Sep. 27, 2019 contract | Jan. 31, 2019 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |
Amounts recognized in earnings related to hedging firm commitments no longer qualified as fair value hedges | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Long-term debt | 6,825,000,000 | 3,443,000,000 | 3,740,000,000 |  |  |  |
Accumulated other comprehensive loss | 508,000,000 | 707,000,000 | 202,000,000 |  |  |  |
2.7% notes, due April 27, 2020 | Treasury Rate |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  | 2.70%
Aggregate principal amount of debt redeemed |  |  |  |  | $ 400,000,000 |  |
4.95% notes, due February 15, 2021 | Treasury Rate |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  | $ 650,000,000
Debt interest rate |  |  |  |  |  |  | 4.95%
Fixed-rate debt |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Long-term debt | 6,575,000,000 | 3,193,000,000 | 3,190,000,000 |  |  |  |
Treasury locks |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive loss | 24,000,000 |  |  |  |  |  |
Fair Value Hedging | Foreign currency forward contracts |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative notional amount | 0 |  |  |  |  |  |
Fair Value Hedging | Treasury locks |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Fair value of derivative liability |  | 26,000,000 |  |  |  |  |
Cash Flow Hedges | Foreign currency forward contracts |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative notional amount | 511,000,000 |  |  |  |  |  |
Pre-tax loss from cash flow hedges recognized in other comprehensive income | 3,000,000 |  |  |  |  |  |
Estimated amount of existing losses to be reclassified into earnings within the next 12 months | 2,000,000 |  |  |  |  |  |
Cash Flow Hedges | Treasury locks |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative notional amount | 650,000,000 |  |  |  |  |  |
Accumulated other comprehensive loss | 16,000,000 | 20,000,000 |  |  |  |  |
Cash Flow Hedges | Treasury locks | L3Harris |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Number of open derivative contracts | contract |  |  |  |  |  | 2 |
Fair value of derivative liability | 35,000,000 |  |  |  |  |  |
Level 2 | Cash Flow Hedges | Treasury locks |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Fair value of derivative liability | 56,000,000 |  |  |  |  |  |
2.900% notes, due December 15, 2029 | Fixed-rate debt |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Long-term debt | $ 400,000,000 | $ 0 | $ 0 |  |  |  |
Debt interest rate | 2.90% |  |  |  | 2.90% |  |

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