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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Apr. 24, 2020
Apr. 26, 2019
Jan. 25, 2019
Components of Deferred Tax Assets and Liabilities [Abstract]      
Reserves and accruals $ 72 $ 50  
Net operating loss and credit carryforwards 113 139  
Stock-based compensation 15 16 $ 6
Deferred revenue 242 205  
Other 14 16  
Gross deferred tax assets 456 426  
Valuation allowance (104) (123)  
Deferred tax assets, net of valuation allowance 352 303  
Prepaids and accruals 49 31  
Acquired intangibles 40 32  
Property and equipment 33 31  
Other 20 10  
Total deferred tax liabilities 142 104  
Deferred tax assets, net of valuation allowance and deferred tax liabilities $ 210 $ 199