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Significant Accounting Policies and Recent Accounting Standards (Details)
$ in Millions
3 Months Ended
Sep. 13, 2019
USD ($)
Jun. 29, 2019
USD ($)
Sep. 27, 2019
USD ($)
Sep. 28, 2018
USD ($)
Business Combination, Separately Recognized Transactions [Line Items]        
Proceeds from sale of business, after selling costs and estimated price adjustments     $ 346 $ 0
ROU assets     934  
ROU liabilities     $ 960  
ASU 2016-02        
Business Combination, Separately Recognized Transactions [Line Items]        
ROU assets   $ 270    
ROU liabilities   $ 289    
L3Harris        
Business Combination, Separately Recognized Transactions [Line Items]        
Exchange ratio   1.30    
L3Harris | Harris Night Vision | Discontinued Operations, Disposed of by Sale | Other non-reportable business segments        
Business Combination, Separately Recognized Transactions [Line Items]        
Cash price on sale of business $ 350      
Proceeds from sale of business, after selling costs and estimated price adjustments $ 346      
L3Harris | Former Harris Shareholders        
Business Combination, Separately Recognized Transactions [Line Items]        
Percentage of voting interests acquired   54.00%    
L3Harris | Former L3 Shareholders        
Business Combination, Separately Recognized Transactions [Line Items]        
Percentage of voting interests acquired   46.00%