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DEBT - Long-term Debt Repaid (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 06, 2017 | Jun. 29, 2018 | Dec. 29, 2017 | Dec. 30, 2016 | Jun. 29, 2018 | Jun. 30, 2017 | Jul. 01, 2016 | Jun. 22, 2018 | Mar. 30, 2018 | Apr. 27, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 24,000,000 | $ 0 | $ 0 |  |  |
Long-term debt |  | $ 3,740,000,000 |  |  | 3,740,000,000 | 3,945,000,000 |  |  |  |
Fixed-rate debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Make-whole redemption price of debt redeemed |  |  |  |  |  |  |  | $ 844,000,000 |  |
Loss on extinguishment of debt |  | 22,000,000 |  |  | 27,000,000 |  |  |  |  |
Long-term debt |  | 3,190,000,000 |  |  | 3,190,000,000 | $ 3,640,000,000 |  |  |  |
Debt issued |  |  |  |  |  |  |  |  |  | $ 2,400,000,000.0
Fixed-rate debt | 2020 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  |  |  |  |  |  | $ 400,000,000 |  |
Debt interest rate percentage |  |  |  |  |  | 4.40% |  | 4.40% |  |
Long-term debt |  | 0 |  |  | 0 | $ 400,000,000 |  |  |  |
Fixed-rate debt | 2021 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt redeemed |  |  |  |  |  |  |  | $ 400,000,000 |  |
Debt interest rate percentage |  |  |  |  |  | 5.55% |  | 5.55% |  |
Long-term debt |  | $ 0 |  |  | $ 0 | $ 400,000,000 |  |  |  |
Fixed-rate debt | 1.999% notes, due April 27, 2018 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate percentage |  | 1.999% |  |  | 1.999% | 1.999% |  |  |  |
Repayment of debt |  | $ 500,000,000 |  |  |  |  |  |  |  |
Long-term debt |  | 0 |  |  | $ 0 | $ 500,000,000 |  |  |  |
Fixed-rate debt | 4.25% notes, due October 1, 2016 | Exelis |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate percentage |  |  |  | 4.25% |  |  |  |  |  |
Repayments of long-term debt |  |  |  | $ 250,000,000 |  |  |  |  |  |
Variable-rate term loans |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term debt |  | 550,000,000 |  |  | 550,000,000 | 305,000,000 |  |  |  |
Variable-rate term loans | Term loan, 5-year tranche, due May 29, 2020 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Repayment of debt |  |  | $ 253,000,000 |  |  |  |  |  |  |
Long-term debt |  | 0 | 1,300,000,000 |  | 0 | $ 269,000,000 |  |  |  |
Unamortized debt issuance costs recognized as loss on extinguishment of debt |  |  | $ 1,000,000 |  |  |  |  |  |  |
Debt instrument term | 5 years |  | 5 years |  |  | 5 years |  |  |  |
Debt issued |  |  |  |  |  |  |  |  | $ 1,300,000,000.0 |
Variable-rate term loans | Term loan, 3-year tranche, due May 29, 2018 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ 0 |  |  | 0 | $ 36,000,000 |  |  |  |
Debt instrument term |  | 3 years |  |  |  | 3 years |  |  |  |
Extinguishment of debt |  | $ 36,000,000 |  |  | $ 305,000,000 |  |  |  |  |
Variable-rate term loans | Variable Rate Term Loan Agreement |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Repayments of long-term debt |  |  |  |  |  | $ 313,000,000 |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value amount of debt instrument that was repurchased. + References No definition available. + Details
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- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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