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Business Combinations - Summary of Preliminary Acquisition Date Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Millions
Apr. 24, 2020
Mar. 06, 2020
May 23, 2019
Apr. 26, 2019
Apr. 27, 2018
Business Acquisition [Line Items]          
Goodwill $ 1,778     $ 1,735 $ 1,739
Talon Storage Solutions, Inc.          
Business Acquisition [Line Items]          
Cash   $ 2      
Other assets   4      
Goodwill   13      
Total assets acquired   29      
Liabilities assumed   (6)      
Total purchase price   23      
Talon Storage Solutions, Inc. | Developed Technology          
Business Acquisition [Line Items]          
Intangible asset   6      
Talon Storage Solutions, Inc. | Customer Contracts/Relationships          
Business Acquisition [Line Items]          
Intangible asset   $ 4      
Cognigo Research Limited          
Business Acquisition [Line Items]          
Cash     $ 2    
Goodwill     30    
Total assets acquired     58    
Liabilities assumed     (5)    
Total purchase price     53    
Cognigo Research Limited | Developed Technology          
Business Acquisition [Line Items]          
Intangible asset     $ 26