Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	May 27, 2018	Aug. 26, 2018
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]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 5,300.0
Business Acquisition, Blue Buffalo [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite Lived Intangible Assets Acquired	269.0
Business Acquisition, Blue Buffalo [Member] | Brands [Member]
Business Acquisition [Line Items]
Indefinite Lived Intangible Assets Acquired	2,700.0
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