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Basis of Presentation - Recent Acquisitions (Details) - USD ($)
shares in Millions, $ in Millions
Jul. 31, 2020
Jun. 16, 2020
Apr. 30, 2020
Mar. 03, 2020
Oct. 16, 2019
Jul. 11, 2019
Mar. 11, 2019
Jan. 07, 2019
Pelco, Inc. | Subsequent Event [Member]                
Business Acquisition [Line Items]                
Consideration transferred $ 110              
IndigoVision                
Business Acquisition [Line Items]                
Consideration transferred   $ 37            
Payments for acquisition   $ 35            
Cybersecurity Services Business                
Business Acquisition [Line Items]                
Consideration transferred       $ 40        
Cash paid for acquisition, net of cash acquired     $ 32 33        
Share-based compensation acquired       $ 6        
Share-based compensation withheld, average service period       2 years        
Data Solutions Business                
Business Acquisition [Line Items]                
Consideration transferred         $ 85      
WatchGuard                
Business Acquisition [Line Items]                
Consideration transferred           $ 271    
Cash paid for acquisition, net of cash acquired           250    
Share-based compensation acquired           $ 16    
Share-based compensation withheld, average service period           2 years    
Avtec                
Business Acquisition [Line Items]                
Cash paid for acquisition, net of cash acquired             $ 136  
VaaS                
Business Acquisition [Line Items]                
Consideration transferred               $ 445
Cash paid for acquisition, net of cash acquired               231
Share-based compensation acquired               $ 38
Share-based compensation withheld, average service period               1 year
Shares issued (in shares)               1.4
Share value               $ 160
Total consideration               $ 391