Debt (Schedule of credit facilities) (Details) - Aug. 30, 2015 € in Millions, $ in Billions	USD ($)	EUR (€)
Line Of Credit Facility [Line Items]
Facility Amount	$ 3.4
Borrowed Amount	0.3
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
Committed Credit Facilities Member | Expiration Date April 2017 [Member]
Line Of Credit Facility [Line Items]
Facility Amount	$ 1.7
Borrowed Amount	0.0
Committed Credit Facilities Member | Expiration Date May 2019 [Member]
Line Of Credit Facility [Line Items]
Facility Amount	1.0
Borrowed Amount	0.0
Committed Credit Facilities Member | Expiration Date June 2019 [Member]
Line Of Credit Facility [Line Items]
Facility Amount	0.2
Borrowed Amount	0.1
Committed Credit Facilities Member | Expiration Date June 2019 [Member] | Yoplait SAS [Member]
Line Of Credit Facility [Line Items]
Facility Amount | €		€ 200.0
Uncommitted Credit Facilities Member
Line Of Credit Facility [Line Items]
Facility Amount	0.5
Borrowed Amount	$ 0.2