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New Accounting Pronouncements (Details) - USD ($)
3 Months Ended
Jul. 28, 2017
Apr. 28, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of change in accounting principle   $ 296,000,000
Accounting Standards Update 2016-09    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Increase (decrease) to net income $ 24,000,000  
Increase (decrease) to diluted earnings per share (in dollars per share) $ 0.02  
Accounting Standards Update 2016-09 | Retained Earnings    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of change in accounting principle   0
Accounting Standards Update 2016-16    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Increase (decrease) to net income $ (25,000,000)  
Increase (decrease) to diluted earnings per share (in dollars per share) $ (0.02)  
Accounting Standards Update 2016-16 | Retained Earnings    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of change in accounting principle   $ 296,000,000