|**Goodwill**                                                            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
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|**Goodwill and Intangible Assets Disclosure [Abstract]**                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Goodwill                                                                | GoodwillGoodwill by business segment, and changes in the carrying amount of goodwill for thetwo quarters ended December 30, 2016by business segment, were as follows:CommunicationSystemsSpace andIntelligenceSystemsElectronicSystemsCriticalNetworks (1)Total(In millions)Balance at July 1, 2016—As reported$781$1,478$1,650$2,066$5,975Decrease from reclassification to assets of discontinued operations (1)———(136)(136)Balance at July 1, 2016— After reclassification$781$1,478$1,650$1,930$5,839Currency translation adjustments1(5)(3)(5)(12)Other2241321Balance at December 30, 2016$784$1,475$1,651$1,938$5,848(1) In the second quarter of fiscal 2017, we entered into a definitive agreement to sell CapRock, which was formerly part of our Critical Networks segment and is reported as discontinued operations in this Report. As a result, our goodwill balance as of July 1, 2016 has been adjusted by$136 millionin order to include CapRock goodwill within our separate presentation of assets and liabilities of discontinued operations in our Condensed Consolidated Balance Sheet (Unaudited) in accordance with GAAP. The carrying amount of CapRock goodwill is included as a component of the “Current assets of discontinued operations” or “Non-current assets of discontinued operations” lines in our Condensed Consolidated Balance Sheet (Unaudited). SeeNote B — Discontinued Operationsin these Notes for additional information.
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|                                                                        | CommunicationSystems                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|                                                                        | (In millions)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Balance at July 1, 2016—As reported                                     | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Decrease from reclassification to assets of discontinued operations (1) | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Balance at July 1, 2016— After reclassification                         | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Currency translation adjustments                                        | 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Other                                                                   | 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Balance at December 30, 2016                                            | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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