| **Long-Term Debt**             | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|--------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Debt Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| LONG-TERM DEBT                 | LONG-TERM DEBTLong-term debt is summarized below: 2016 2015     (In millions)Variable-rate term loans:   3-year tranche, due May 29, 2018$300 $6345-year tranche, due May 29, 2020318 634Total variable-rate term loans618 1,268Fixed-rate debt:   4.25% notes, due October 1, 2016 250 2501.999% notes, due April 27, 2018500 5002.7% notes, due April 27, 2020400 4004.4% notes, due December 15, 2020400 4005.55% notes, due October 1, 2021400 4003.832% notes, due April 27, 2025600 6007.0% debentures, due January 15, 2026100 1006.35% debentures, due February 1, 202826 264.854% notes, due April 27, 2035400 4006.15% notes, due December 15, 2040300 3005.054% notes, due April 27, 2045500 500Other— 24Total fixed-rate debt3,876 3,900Total debt4,494 5,168Less: current portion of long-term debt(382) (130)Total long-term debt4,112 5,038Plus: unamortized bond premium38 51Less: unamortized discounts(3) (3)Less: unamortized debt issuance costs(27) (33)Total long-term debt, net$4,120 $5,053The potential maturities of long-term debt, including the current portion, for the five years following fiscal 2016 and, in total, thereafter are: $380 million in fiscal 2017; $800 million in fiscal 2018; $65 million in fiscal 2019; $523 million in fiscal 2020; $400 million in fiscal 2021; and $2.326 billion thereafter. In connection with our acquisition of Exelis in May 2015, Harris Corporation fully and unconditionally guaranteed all of the long-term fixed-rate debt securities issued by Exelis Inc. outstanding at the time of the acquisition, consisting of $250 million in aggregate principal amount of 4.25% senior notes due October 1, 2016 and $400 million in aggregate principal amount of 5.55% senior notes due October 1, 2021 (together, the “Exelis Notes”). In addition, Exelis Inc. fully and unconditionally guaranteed all of the long-term fixed-rate debt securities issued by Harris Corporation outstanding at the time of the acquisition. On December 31, 2015, Exelis Inc. merged with and into Harris Corporation, with Harris Corporation being the surviving corporation in the merger, the separate existence of Exelis Inc. ceased, Harris Corporation assumed the obligations of Exelis Inc. under the Exelis Notes, and the cross guarantees of our outstanding long-term fixed-rate debt securities as described above terminated.New Long-Term Debt in Fiscal 2015Variable-rate Term Loans:    On May 29, 2015, in connection with the closing of our acquisition of Exelis, we borrowed $1.3 billion under our Term Loan Agreement (the “Term Loan Agreement”), dated as of March 16, 2015, with a syndicate of lenders. The Term Loan Agreement provides for total term loan commitments of $650 million in a 3-year tranche and $650 million in a 5-year tranche, for an aggregate principal amount of $1.3 billion. The proceeds of the term loans were used for consummating our acquisition of Exelis and other transactions and payments related thereto. At our election, borrowings under the Term Loan Agreement will bear interest either at (i) the eurodollar rate plus an applicable margin, or (ii) the base rate plus an applicable margin. The eurodollar rate for an interest period is the rate per annum equal to (a) LIBOR for such interest period, divided by (b) a percentage equal to 1.00 minus the daily average eurodollar reserve rate for such interest period. For both tranches of term loans, the applicable interest rate margin over the eurodollar rate may range from a minimum of 1.125% to a maximum of 2.00% based on our Senior Debt Ratings. The base rate is a fluctuating rate per annum equal to the highest of (i) the federal funds rate plus 0.50%, (ii) the prime lending rate published in The Wall Street Journal, and (iii) the eurodollar rate determined on a daily basis for a one-month interest period plus 100 basis points. For both tranches of term loans, the applicable interest rate margin over the base rate may range from a minimum of 0.125% to a maximum of 1.00% based on our Senior Debt Ratings. Borrowings under the Term Loan Agreement are denominated in U.S. Dollars.Under the Term Loan Agreement, we may, at any time or from time to time, voluntarily prepay term loans of either tranche in whole or in part without premium or penalty, but we may not re-borrow amounts thereunder. The Term Loan Agreement contains certain representations and warranties for the benefit of the administrative agent and the lenders, including representations relating to: due incorporation and good standing; due authorization of the Term Loan Agreement documentation; absence of any requirement for governmental or third party authorization for the due execution, delivery and performance of any Term Loan Agreement documentation; enforceability of the Term Loan Agreement documentation; accuracy of financial statements; no material adverse effect since June 27, 2014; absence of material undisclosed litigation on March 16, 2015; compliance with ERISA and certain other laws; payment of taxes; and solvency. The Term Loan Agreement contains certain affirmative covenants, including covenants relating to: reporting obligations; maintenance of corporate existence and good standing; compliance with laws; maintenance of properties and insurance; payment of taxes; compliance with environmental laws and ERISA; and visitation and inspection by the administrative agent and the lenders. The Term Loan Agreement also requires that certain of our subsidiaries that incur, borrow or guarantee debt in a principal amount exceeding $100 million become guarantors under the Term Loan Agreement. The Term Loan Agreement also contains certain negative covenants, including covenants: limiting certain liens on assets; limiting certain mergers, consolidations or sales of assets; limiting certain sale and leaseback transactions; limiting certain vendor financing investments; and limiting certain investments in unrestricted subsidiaries. The Term Loan Agreement also requires that we not permit at any time our ratio of consolidated total indebtedness to total capital, each as defined in the Term Loan Agreement, to be greater than 0.65:1.00. We were in compliance with the covenants in the Term Loan Agreement at July 1, 2016.The Term Loan Agreement contains certain events of default, including: failure to make payments under the Term Loan Agreement; failure to perform or observe terms, covenants or agreements contained in the Term Loan Agreement; material inaccuracy of any representation or warranty under the Term Loan Agreement; payment default by us or certain of our subsidiaries under other indebtedness with a principal amount in excess of $100 million or acceleration of or ability to accelerate such other indebtedness; occurrence of one or more final judgments or orders for the payment by us of money in excess of $100 million that remain unsatisfied; incurrence by us or certain of our subsidiaries of certain ERISA liabilities in excess of $100 million; any bankruptcy or insolvency of Harris or any material subsidiary; invalidity of Term Loan Agreement documentation; or a change of control (as defined in the Term Loan Agreement). If any event of default occurs, then the lenders may, among other things, terminate their commitments and declare all outstanding borrowings to be immediately due and payable together with accrued interest and fees.The Term Loan Agreement requires, for each tranche of term loans, quarterly principal amortization payments equal to 2.50% of the initial principal amount of the term loans in such tranche on May 29, 2015, with the balance of the term loans payable in full on May 29, 2018 for loans in the 3-year tranche and on May 29, 2020 for loans in the 5-year tranche, unless the commitments are terminated earlier either at our request or if certain events of default described in the Term Loan Agreement occur. We incurred $6 million of debt issuance costs related to the issuance of the term loans, which are being amortized using the effective interest rate method over the respective lives of the two tranches, and such amortization is reflected as a portion of interest expense in our Consolidated Statement of Income.Fixed-rate Debt:    On April 27, 2015, in connection with the then-pending acquisition of Exelis, to fund a portion of the cash consideration and other amounts payable under the terms of the merger agreement and to redeem certain of our existing notes, we completed the issuance of new long-term fixed-rate debt securities in an aggregate principal amount of $2.4 billion, comprised of five tranches with principal amounts, interest rates and maturity dates as follows:•$500 million in aggregate principal amount of 1.999% Notes due April 27, 2018 (the “New 2018 Notes”),•$400 million in aggregate principal amount of 2.700% Notes due April 27, 2020 (the “New 2020 Notes”),•$600 million in aggregate principal amount of 3.832% Notes due April 27, 2025 (the “New 2025 Notes”),•$400 million in aggregate principal amount of 4.854% Notes due April 27, 2035 (the “New 2035 Notes”), and•$500 million in aggregate principal amount of 5.054% Notes due April 27, 2045 (the “New 2045 Notes” and collectively with the New 2018 Notes, the New 2020 Notes, the New 2025 Notes and the New 2035 Notes, the “New Notes”).Interest on each series of the New Notes is payable semi-annually in arrears on April 27 and October 27 of each year, commencing October 27, 2015. At any time and from time to time prior to April 27, 2018 (in the case of the New 2018 Notes), March 27, 2020 (in the case of the New 2020 Notes), January 27, 2025 (in the case of the New 2025 Notes), October 27, 2034 (in the case of the New 2035 Notes) and October 27, 2044 (in the case of the New 2045 Notes), we may redeem the applicable series of notes, in whole or in part, at our option, at the applicable “make-whole” redemption price. The applicable “make-whole” redemption price is equal to the greater of 100 percent of the principal amount of the notes being redeemed or the sum of the present values of the remaining scheduled payments of the principal and interest (other than interest accruing to the date of redemption) on the notes being redeemed, discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate, as defined, plus (i) 20 basis points in the case of the New 2018 Notes, (ii) 20 basis points in the case of the New 2020 Notes, (iii) 30 basis points in the case of the New 2025 Notes, (iv) 35 basis points in the case of the New 2035 Notes, and (v) 40 basis points in the case of the New 2045 Notes. In each case, we will pay accrued interest on the principal amount of the notes being redeemed to, but not including, the redemption date. Except as set forth above, the New 2018 Notes are not redeemable prior to maturity. At any time and from time to time on or after March 27, 2020 (in the case of the New 2020 Notes), January 27, 2025 (in the case of the New 2025 Notes), October 27, 2034 (in the case of the New 2035 Notes) and October 27, 2044 (in the case of the New 2044 Notes), we may redeem the applicable series of notes, in whole or in part, at our option, at a redemption price equal to 100 percent of the principal amount of the notes being redeemed, plus accrued interest on the principal amount of the notes being redeemed to, but not including, the redemption date. In addition, upon a change of control combined with a below-investment-grade rating event, we may be required to make an offer to repurchase the New Notes at a price equal to 101 percent of the aggregate principal amount of the notes being repurchased, plus accrued interest on the notes being repurchased to, but not including, the date of repurchase. We incurred $23 million of debt issuance costs related to the issuance of the New Notes, respectively, which are being amortized on a straight-line basis over the respective lives of the notes, which approximates the effective interest rate method, and such amortization is reflected as a portion of interest expense in our Consolidated Statement of Income.Exelis Fixed-rate Debt Outstanding at Time of Acquisition:    Our long-term debt includes long-term fixed-rate debt securities issued by Exelis Inc. that were outstanding when we acquired Exelis on May 29, 2015, which consisted of $250 million in aggregate principal amount of 4.25% senior notes due October 1, 2016 and $400 million in aggregate principal amount of 5.55% senior notes due October 1, 2021 (together, the “Exelis Notes”), and were assumed by Harris Corporation  after Exelis Inc. merged with and into Harris Corporation on December 31, 2015.  As part of our purchase accounting, the Exelis Notes were recorded at fair value ($702 million on a combined basis, representing a premium of $52 million), and unamortized debt issuance costs related to the Exelis Notes were written off as of May 29, 2015. This premium will be amortized to interest expense over the lives of the related Exelis Notes on a straight-line basis which approximates the effective interest rate method, and such amortization is reflected as a reduction of interest expense in our Consolidated Statement of Income. Accrued interest payable on the Exelis Notes is payable on April 1 and October 1 of each year.The Exelis Notes are subject to the terms of an indenture with Union Bank, N.A., as trustee (the “Exelis Indenture”). The Exelis Indenture includes covenants that restrict our ability, subject to exceptions, to incur indebtedness secured by liens or engage in sale and leaseback transactions. The Exelis Indenture also provides for customary events of default, including but not limited to: failure to pay interest for 30 days; failure to pay principal when due; failure to perform any other covenant in the Exelis Indenture for 90 days after receipt of notice from the trustee or from holders of 25 percent of the outstanding principal amount; and certain events of bankruptcy, insolvency or reorganization of Exelis Inc. We may redeem the Exelis Notes at any time in whole or, from time to time, in part at the applicable “make-whole” redemption price. The applicable “make-whole” redemption price is equal to the greater of 100 percent of the principal amount of the Exelis Notes being redeemed or the sum of the present values of the remaining scheduled payments of principal and interest (other than interest accruing to the date of redemption) on the notes being redeemed, discounted to the redemption date on a semi-annual basis at the Treasury Rate, as defined, plus 50 basis points, plus in each case accrued and unpaid interest to the date of redemption.Long-Term Debt Redeemed in Fiscal 2015On May 27, 2015, we completed our optional redemption of the entire outstanding $400 million aggregate principal amount of our 5.95% Notes due December 1, 2017, which we issued on December 5, 2007, at a “make-whole” redemption price as set forth in the notes. The “make-whole” redemption price was $448 million, and after adjusting for the carrying value of our debt issuance costs and discounts, we recorded a $51 million loss on prepayment of long-term debt in the fourth quarter of fiscal 2015, which we included in the “Non-operating income (loss)” line item in our Consolidated Statement of Income.On May 27, 2015, we completed our optional redemption of the entire outstanding $350 million aggregate principal amount of our 6.375% Notes due June 15, 2019, which we issued on June 9, 2009, at a “make-whole” redemption price as set forth in the notes. The “make-whole” redemption price was $415 million, and after adjusting for the carrying value of our debt issuance costs and discounts, we recorded a $67 million loss on prepayment of long-term debt in the fourth quarter of fiscal 2015, which we included in the “Non-operating income (loss)” line item in our Consolidated Statement of Income.Long-Term Debt From Prior to Fiscal 2015 That Remained Outstanding at July 1, 2016On December 3, 2010, we completed the issuance of $400 million in aggregate principal amount of 4.4% Notes due December 15, 2020 (the “2020 Notes”) and $300 million in aggregate principal amount of 6.15% Notes due December 15, 2040 (the “2040 Notes”). Interest on each of the 2020 Notes and the 2040 Notes is payable semi-annually in arrears on June 15 and December 15 of each year. We may redeem the 2020 Notes and/or the 2040 Notes at any time in whole or, from time to time, in part at the applicable “make-whole” redemption price. The applicable “make-whole” redemption price is equal to the greater of 100 percent of the principal amount of the notes being redeemed or the sum of the present values of the remaining scheduled payments of the principal and interest (other than interest accruing to the date of redemption) on the notes being redeemed, discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate, as defined, plus 25 basis points in the case of the 2020 Notes and 35 basis points in the case of the 2040 Notes. In each case, we will pay accrued interest on the principal amount of the notes being redeemed to, but not including, the redemption date. In addition, upon a change of control combined with a below-investment-grade rating event, we may be required to make an offer to repurchase the notes at a price equal to 101 percent of the aggregate principal amount of the notes being repurchased, plus accrued interest on the notes being repurchased to, but not including, the date of repurchase. We incurred $6 million and $5 million in debt issuance costs and discounts related to the issuance of the 2020 Notes and 2040 Notes, respectively, which are being amortized on a straight-line basis over the respective lives of the notes, which approximates the effective interest rate method, and are reflected as a portion of interest expense in our Consolidated Statement of Income.In January 1996, we completed the issuance of $100 million in aggregate principal amount of 7.0% Debentures due January 15, 2026. The debentures are not redeemable prior to maturity.In February 1998, we completed the issuance of $150 million in aggregate principal amount of 6.35% Debentures due February 1, 2028. On December 5, 2007, we repurchased and retired $25 million in aggregate principal amount of the debentures. On February 1, 2008, we redeemed $99 million in aggregate principal amount of the debentures pursuant to the procedures for redemption at the option of the holders of the debentures. We may redeem the remaining $26 million in aggregate principal amount of the debentures in whole, or in part, at any time at a pre-determined redemption price.The following table presents the carrying amounts and estimated fair values of our long-term debt: July 1, 2016 July 3, 2015 CarryingAmount FairValue CarryingAmount FairValue         (In millions)Long-term debt (including current portion) (1)$4,502 $4,873 $5,183 $5,230 (1)The fair value was estimated using a market approach based on quoted market prices for our debt traded in the secondary market. If our long-term debt in our balance sheet were measured at fair value, it would be categorized in Level 2 of the fair value hierarchy. |

| X                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
+ Details**Name:**us-gaap_DebtDisclosureAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The entire disclosure for long-term debt.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -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
+ Details**Name:**us-gaap_LongTermDebtTextBlock**Namespace Prefix:**us-gaap_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |