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Stock-Based Compensation (Stock Option Activity) (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
May. 31, 2015
May. 25, 2014
May. 26, 2013
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Total intrinsic value of options exercised $ 90.2 $ 39.9 $ 47.1
Cash received from option exercises $ 154.6 $ 50.9 $ 57.0
Maximum terms of awards (years) 10 years    
Vesting period (years) 4 years    
Darden stock units      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to unvested stock options granted $ 34.0    
Unrecognized compensation cost, period of recognition, in years (years) 3 years    
Fair market value on grant date $ 21.5    
Stock options      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to unvested stock options granted $ 11.7    
Unrecognized compensation cost, period of recognition, in years (years) 1 year 3 months 18 days    
Fair market value on grant date $ 22.7    
Minimum      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 1 year    
Minimum | Darden stock units      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 4 years    
Maximum      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 4 years    
Maximum | Darden stock units      
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]      
Vesting period (years) 5 years