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Goodwill and Other Intangible Assets (Schedule of at-risk brand intangible assets) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 25, 2018
Nov. 25, 2018
May 27, 2018
Indefinite-lived Intangible Assets [Line Items]      
Impairment charges $ 192.6 $ 192.6  
Carrying Value of Intangible Asset 7,202.7 7,202.7 $ 7,445.1
Fair value of impaired indefinite-lived intangible assets [1] 330.0 330.0  
Latin America [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Carrying Value of Intangible Asset 209.0 $ 209.0  
Excess Fair Value as of Test Date, Percentage   7.00%  
Progresso [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Impairment charges   $ 132.1  
Fair value of impaired indefinite-lived intangible assets [1] 330.0 330.0  
Food Should Taste Good [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Impairment charges   45.1  
Mountain High [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Impairment charges   15.4  
Yoki [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Carrying Value of Intangible Asset $ 49.1 $ 49.1  
Excess Fair Value as of Test Date, Percentage   10.00%  
[1]
(a) Level 3 assets in the fair value hierarchy.