Debt Instrument, Basis Spread on Variable Rate, Base Rate

No definition available.

Name:	hrs_DebtInstrumentBasisSpreadonVariableRateBaseRate
Namespace Prefix:	hrs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Basis Spread on Variable Rate, Initial Rate

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentBasisSpreadonVariableRateInitialRate
Namespace Prefix:	hrs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Basis Spread on Variable Rate, Rate Divisor Percentage

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentBasisSpreadonVariableRateRateDivisorPercentage
Namespace Prefix:	hrs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Debt Default, Maturity Date Extension Period

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentDebtDefaultMaturityDateExtensionPeriod
Namespace Prefix:	hrs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Debt Default, Number of Extension Periods

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentDebtDefaultNumberofExtensionPeriods
Namespace Prefix:	hrs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Debt Default, Number of Extension Periods Per Calendar Year

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentDebtDefaultNumberofExtensionPeriodsPerCalendarYear
Namespace Prefix:	hrs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Debt Default, Period to Request Extension of Maturity Date

+ References

No definition available.

+ Details

Name:	hrs_DebtInstrumentDebtDefaultPeriodtoRequestExtensionofMaturityDate
Namespace Prefix:	hrs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit, Covenant, Maximum Amount of ERISA Liability

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditCovenantMaximumAmountofERISALiability
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit, Covenant, Maximum of Unsatisfied Final Judgments From Certain Subsidiaries

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditCovenantMaximumofUnsatisfiedFinalJudgmentsFromCertainSubsidiaries
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit, Covenant Terms, Maximum Amount of Other Indebtedness From Certain Subsidiaries

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditCovenantTermsMaximumAmountofOtherIndebtednessFromCertainSubsidiaries
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Amount of Commitments

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditFacilityMaximumBorrowingCapacityAmountofCommitments
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Amount of Credit Extensions

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditFacilityMaximumBorrowingCapacityAmountofCreditExtensions
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Sub-limit For Foreign Currency

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditFacilityMaximumBorrowingCapacitySublimitForForeignCurrency
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Sub-limit For Letters Of Credit

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditFacilityMaximumBorrowingCapacitySublimitForLettersOfCredit
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Sub-limit For Swing Line Loans

+ References

No definition available.

+ Details

Name:	hrs_LineofCreditFacilityMaximumBorrowingCapacitySublimitForSwingLineLoans
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

+ References

Reference 1: 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(13)(2))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&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(19)(a)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommercialPaper
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: 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

Reference 3: 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=119400593&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=hrs_CreditFacility2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=hrs_FederalReserveBankofNewYorkNYFRBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=hrs_CreditFacility2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

CREDIT ARRANGEMENTS (Details)	Jun. 28, 2019 USD ($) extension	Jun. 26, 2018 USD ($)	Jun. 29, 2018 USD ($)
Line of Credit Facility [Line Items]
Short term borrowings under commercial paper	$ 100,000,000		$ 75,000,000
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement
Line of Credit Facility [Line Items]
Value of senior unsecured revolving credit arrangement	$ 2,000,000,000
Term of senior unsecured revolving credit agreement	5 years
Sub-limit for swingline loans	$ 140,000,000
Sub-limit for letters of credit	350,000,000
Foreign currency sub-limit	400,000,000
Provision for maximum amount of commitments	1,000,000,000
Provision for maximum amount of credit extensions	$ 3,000,000,000
Unused commitment fee percentage	0.20%
Maximum allowable percentage of consolidated total indebtedness to total capital	0.65
Payment failures on other debt which can trigger an event of default	$ 200,000,000
Amount of unsatisfied final judgment or orders considered an event of default	200,000,000
Amount of certain ERISA liability incurrence considered an event of default	$ 200,000,000
Period to request extension of maturity date in event of default	45 days
Maturity date extension period in event of default	1 year
Number of extension periods per calendar year in event of default \| extension	1
Number of extension periods in event of default \| extension	2
Borrowings outstanding	$ 0
Short term borrowings under commercial paper	$ 100,000,000
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| Maximum
Line of Credit Facility [Line Items]
Unused commitment fee percentage	0.30%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| Minimum
Line of Credit Facility [Line Items]
Unused commitment fee percentage	0.125%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| LIBOR
Line of Credit Facility [Line Items]
Rate divisor percentage	1.00%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| Eurodollar
Line of Credit Facility [Line Items]
Interest rate margin	1.375%
Interest rate margin, base rate	1.00%
Interest rate margin, initial rate	0.375%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| Eurodollar \| Maximum
Line of Credit Facility [Line Items]
Interest rate margin	1.875%
Interest rate margin, initial rate	0.875%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| Eurodollar \| Minimum
Line of Credit Facility [Line Items]
Interest rate margin	1.125%
Interest rate margin, initial rate	0.125%
Senior Unsecured Debt \| Revolving Credit Facility \| 2019 Credit Agreement \| NYFRB
Line of Credit Facility [Line Items]
Interest rate margin, base rate	0.50%
Senior Unsecured Debt \| Revolving Credit Facility \| 2018 Credit Agreement
Line of Credit Facility [Line Items]
Value of senior unsecured revolving credit arrangement		$ 1,000,000,000
Term of senior unsecured revolving credit agreement		5 years