SENIOR LONG-TERM DEBT (Schedule of Debt) (Details) (USD $) In Millions, unless otherwise specified	May 25, 2014	May 26, 2013	May 25, 2014 4.65% Senior Debt Due January 2043	May 26, 2013 4.65% Senior Debt Due January 2043	Feb. 24, 2013 4.65% Senior Debt Due January 2043	May 25, 2014 6.625% Senior Debt Due August 2039 (Including Ralcorp Senior Notes)	May 26, 2013 6.625% Senior Debt Due August 2039 (Including Ralcorp Senior Notes)	May 25, 2014 8.25% Senior Debt Due September 2030	May 26, 2013 8.25% Senior Debt Due September 2030	May 25, 2014 7.0% Senior Debt Due October 2028	May 26, 2013 7.0% Senior Debt Due October 2028	May 25, 2014 6.7% Senior Debt Due August 2027	May 26, 2013 6.7% Senior Debt Due August 2027	May 25, 2014 7.125% Senior Debt Due October 2026	May 26, 2013 7.125% Senior Debt Due October 2026	May 25, 2014 3.2% Senior Debt Due January 2023	May 26, 2013 3.2% Senior Debt Due January 2023	Feb. 24, 2013 3.2% Senior Debt Due January 2023	May 25, 2014 3.25% Senior Debt Due September 2022	May 26, 2013 3.25% Senior Debt Due September 2022	Nov. 25, 2012 3.25% Senior Debt Due September 2022	May 25, 2014 9.75% Subordinated Debt Due March 2021	May 26, 2013 9.75% Subordinated Debt Due March 2021	May 25, 2014 4.95% Senior Debt Due August 2020 (Including Ralcorp Senior Notes)	May 26, 2013 4.95% Senior Debt Due August 2020 (Including Ralcorp Senior Notes)	May 25, 2014 7.0% Senior Debt Due April 2019	May 26, 2013 7.0% Senior Debt Due April 2019	May 25, 2014 1.9% Senior Debt Due January 2018	May 26, 2013 1.9% Senior Debt Due January 2018	Feb. 24, 2013 1.9% Senior Debt Due January 2018	May 25, 2014 LIBOR plus 1.75% term loans due January 2018	May 26, 2013 LIBOR plus 1.75% term loans due January 2018	May 25, 2014 2.1% Senior Debt Due March 2018	May 26, 2013 2.1% Senior Debt Due March 2018	Nov. 25, 2012 2.1% Senior Debt Due March 2018	May 25, 2014 5.819% Senior Debt Due June 2017	May 26, 2013 5.819% Senior Debt Due June 2017	May 25, 2014 1.3% Senior Debt Due January 2016	May 26, 2013 1.3% Senior Debt Due January 2016	Feb. 24, 2013 1.3% Senior Debt Due January 2016	May 25, 2014 1.35% Senior Debt Due September 2015	May 26, 2013 1.35% Senior Debt Due September 2015	Nov. 25, 2012 1.35% Senior Debt Due September 2015	May 25, 2014 5.875% Senior Debt Due April 2014	May 26, 2013 5.875% Senior Debt Due April 2014	May 25, 2014 2.00% to 9.59% Lease Financing Obligations Due Through 2029	May 26, 2013 2.00% to 9.59% Lease Financing Obligations Due Through 2029	May 25, 2014 Other Indebtedness	May 26, 2013 Other Indebtedness	May 25, 2014 Minimum 2.00% to 9.59% Lease Financing Obligations Due Through 2029	May 25, 2014 Maximum 2.00% to 9.59% Lease Financing Obligations Due Through 2029
Debt Instrument [Line Items]
Senior notes	$ 8,737.1	$ 9,292.2	$ 937.0	$ 1,000.0	$ 1,000.0	$ 450.0	$ 450.0	$ 300.0	$ 300.0	$ 382.2	$ 382.2	$ 9.2	$ 9.2	$ 372.4	$ 372.4	$ 1,225.0	$ 1,225.0	$ 1,225.0	$ 250.0	$ 250.0		$ 195.9	$ 195.9	$ 300.0	$ 300.0	$ 500.0	$ 500.0	$ 1,000.0	$ 1,000.0	$ 1,000.0	$ 900.0	$ 900.0	$ 250.0	$ 250.0		$ 500.0	$ 500.0	$ 750.0	$ 750.0	$ 750.0	$ 250.0	$ 250.0		$ 0	$ 500.0	$ 79.0	$ 77.4	$ 86.4	$ 80.1
Unamortized fair value adjustment of senior debt in connection with Ralcorp	154.5	161.6
Unamortized discounts/premiums	(46.5)	(57.5)
Adjustment due to hedging activity	6.7	8.5
Less current installments	(84.2)	(517.9)
Total long-term debt	$ 8,767.6	$ 8,886.9
Interest rate	3.25%		4.65%		4.65%	6.625%		8.25%		7.00%		6.70%		7.125%		3.20%		3.20%	3.25%		3.25%	9.75%		4.95%		7.00%		1.90%		1.90%	1.75%		2.10%		2.10%	5.819%		1.30%		1.30%	1.35%		1.35%	5.875%						2.00%	9.59%