Debt (Schedule of credit facilities) (Details) € in Millions, $ in Billions	12 Months Ended
	May 29, 2016 EUR (€)	May 29, 2016 USD ($)
Line of Credit Facility [Line Items]
Facility Amount		$ 3.3
Borrowed Amount		0.2
Committed Credit Facilities [Member]
Line of Credit Facility [Line Items]
Facility Amount		2.9
Borrowed Amount		$ 0.1
Minimum fixed charge coverage ratio	2.5	2.5
Compliance with credit facility covenants	We were in compliance with all credit facility covenants as of May 29, 2016.
Line of Credit Expiring May 2021 [Member]
Line of Credit Facility [Line Items]
Facility Amount		$ 2.7
Borrowed Amount		0.0
Expiration date of credit facility	May 31, 2021
Line of Credit Expiring June 2019 [Member]
Line of Credit Facility [Line Items]
Facility Amount		0.2
Borrowed Amount		0.1
Expiration date of credit facility	Jun. 30, 2019
Line of Credit Expiring June 2019 [Member] | Yoplait SAS [Member]
Line of Credit Facility [Line Items]
Facility Amount | €	€ 200.0
Expiration date of credit facility	Jun. 30, 2019
Line of Credit Expiring April 2017 [Member]
Line of Credit Facility [Line Items]
Facility Amount		1.7
Line of Credit Expiring May 2019 [Member]
Line of Credit Facility [Line Items]
Facility Amount		1.0
Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Facility Amount		0.4
Borrowed Amount		$ 0.1