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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
May 27, 2018
Feb. 24, 2019
Goodwill and Other Intangible Assets [Abstract]    
Future Amortization Expense, Year One   $ 40.0
Future Amortization Expense, Year Two   40.0
Future Amortization Expense, Year Three   40.0
Future Amortization Expense, Year Four   40.0
Future Amortization Expense, Year Five   $ 40.0
Business Acquisition, Blue Buffalo [Member] | Pet Segment [Member]    
Business Acquisition [Line Items]    
Goodwill, Acquired During Period $ 5,300.0  
Business Acquisition, Blue Buffalo [Member] | Pet Segment [Member] | Customer Relationships [Member]    
Business Acquisition [Line Items]    
Finite Lived Intangible Assets Acquired 269.0  
Business Acquisition, Blue Buffalo [Member] | Pet Segment [Member] | Brands [Member]    
Business Acquisition [Line Items]    
Indefinite Lived Intangible Assets Acquired $ 2,700.0