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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 8 Months Ended 9 Months Ended
Jan. 24, 2020
Jan. 25, 2019
Dec. 31, 2017
Jan. 24, 2020
Jan. 25, 2019
Apr. 26, 2019
Income Tax Contingency [Line Items]            
U.S. federal corporate tax rate     35.00% 21.00%    
Provision (benefit) for income taxes $ (1) $ 70   $ 71 $ 111  
Discrete tax benefit due to lapse of certain statutes of limitations 50          
Gross unrecognized tax benefits 187     187    
Gross unrecognized tax benefits included in other long-term liabilities 167     167   $ 252
Unrecognized tax benefits that would affect provision for income taxes $ 165     $ 165    
Impact of ASC 606 Adoption | ASC 606            
Income Tax Contingency [Line Items]            
Provision (benefit) for income taxes         $ (34)