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Restructuring and Other Exit Costs - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 28, 2019
Apr. 03, 2020
Jan. 03, 2020
Restructuring Cost and Reserve [Line Items]      
Restructuring liabilities   $ 48 $ 65
Restructuring charges   3  
Employee severance-related costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring liabilities   41 58
Restructuring charges   3  
Employee severance-related costs | L3Harris      
Restructuring Cost and Reserve [Line Items]      
Restructuring liabilities   38  
Facilities consolidation and other exit costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring liabilities   7 $ 7
Remaining lease term (less than) 3 years    
Restructuring charges   0  
Aviation Systems | Employee Severance, COVID-19 Related      
Restructuring Cost and Reserve [Line Items]      
Restructuring liabilities   $ 3