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Stock-Based Compensation (Performance Stock Unit Activity) (Narrative) (Details) - USD ($)
12 Months Ended
May 28, 2017
May 29, 2016
May 31, 2015
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 4 years    
Performance Stock Units, Cash Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Total stock unit liability $ 7,500,000 $ 10,400,000  
Vesting period (years) 3 years    
Unrecognized compensation cost related to unvested stock options granted $ 500,000    
Unrecognized compensation cost, period of recognition, in years (years) 2 months 6 days    
Fair market value on grant date $ 6,600,000    
Performance Stock Units, Equity Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to unvested stock options granted $ 12,600,000    
Unrecognized compensation cost, period of recognition, in years (years) 2 years 4 months    
Employee stock purchase plan      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Percentage of capital stock (percentage) 5.00%    
Investment authorized $ 5,000.0    
Shares available for purchase by employees (shares) 3,600,000.0    
Percent of fair market value, common stock purchased by employees (percentage) 85.00%    
Cash received from employees who acquired shares under ESPP $ 5,200,000 4,800,000 $ 5,200,000
Minimum | Performance Stock Units, Cash Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting percentage (percentage) 0.00%    
Minimum | Performance Stock Units, Equity Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 3 years    
Vesting percentage (percentage) 0.00%    
Maximum | Performance Stock Units, Cash Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting percentage (percentage) 150.00%    
Maximum | Performance Stock Units, Equity Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 4 years    
Vesting percentage (percentage) 150.00%    
Other Current Liabilities | Performance Stock Units, Cash Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Current stock unit liability   7,100,000  
Other Liabilities | Performance Stock Units, Cash Settled      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Noncurrent stock unit liability   $ 3,300,000