Debt (Schedule of credit facilities) (Details)	Nov. 23, 2014 USD ($)	Nov. 23, 2014 Committed Credit Facilities Member USD ($)	Nov. 23, 2014 Committed Credit Facilities Member Expiration Date April 2017 [Member] USD ($)	Nov. 23, 2014 Committed Credit Facilities Member Expiration Date May 2019 [Member] USD ($)	Nov. 23, 2014 Committed Credit Facilities Member Expiration Date June 2019 [Member] USD ($)	Nov. 23, 2014 Committed Credit Facilities Member Expiration Date June 2019 [Member] Yoplait SAS [Member] EUR (€)	Nov. 23, 2014 Uncommitted Credit Facilities Member USD ($)
Line Of Credit Facility [Line Items]
Facility Amount	$ 3,400,000,000	$ 3,000,000,000	$ 1,700,000,000	$ 1,000,000,000	$ 300,000,000	€ 200,000,000	$ 400,000,000
Borrowed Amount	$ 300,000,000	$ 100,000,000	$ 0	$ 0	$ 100,000,000		$ 200,000,000
Minimum Fixed Charge Coverage Ratio		2.5