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Stock-Based Compensation - Narrative (Details)
$ in Millions
3 Months Ended
Apr. 28, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock-based compensation expense related to equity awards not expected to vest $ 85
Aggregate amount of unearned stock-based compensation expense related to equity awards, adjusted for estimated forfeitures $ 2,270
Estimated weighted average amortization period 2 years 8 months 21 days
Employee Stock Purchase Plan  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Estimated weighted average amortization period 1 year 4 months 4 days