Goodwill and Other Intangible Assets (Schedule of at-risk brand intangible assets) (Details) - USD ($) $ in Millions	9 Months Ended
	Feb. 25, 2018	May 28, 2017
Indefinite-lived Intangible Assets [Line Items]
Carrying Value of Intangible Asset	$ 4,604.1	$ 4,530.4
Yoki [Member]
Indefinite-lived Intangible Assets [Line Items]
Carrying Value of Intangible Asset	$ 138.2
Excess Fair Value as of Test Date, Percentage	1.00%
Progresso [Member]
Indefinite-lived Intangible Assets [Line Items]
Carrying Value of Intangible Asset	$ 462.1
Excess Fair Value as of Test Date, Percentage	6.00%
Latin America {Member}
Indefinite-lived Intangible Assets [Line Items]
Carrying Value of Intangible Asset	$ 272.0
Excess Fair Value as of Test Date, Percentage	21.00%