FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	May. 31, 2015	Nov. 24, 2013	Feb. 24, 2013	May. 31, 2015	May. 25, 2014	May. 26, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment				$ 1,527.9	$ 602.2
Impairment charges				48.8	75.7
Held for Sale	$ 0.0			0.0	830.6	$ 898.7
Asset impairment charges				1,615.3	720.0	$ 20.2
Carrying amount of long-term debt	7,900.0			7,900.0	8,900.0
Long-term debt at fair value	8,300.0			8,300.0	9,500.0
Hedged debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of long-term debt					500.0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of agricultural land and facility					19.7
Fair value of land and facility					10.8
Impairment charge					8.9
Level 3 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of assets held for sale					68.9
Held for Sale					43.5
Asset impairment charges					25.4
Private Brands
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment	1,530.0			1,527.9	602.2
Impairment charges				43.7	3.2
Carrying amount of agricultural land and facility	$ 13.7			13.7
Impairment charge of technology license				43.7	3.2
Consumer Foods
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment				0.0	0.0
Impairment charges				4.8	72.5
Impairment charge of technology license				4.8	72.5
Commercial Foods
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment				0.0	0.0
Impairment charges				0.3
Asset impairment charges		$ 8.9	$ 10.2
Impairment charge of technology license				$ 0.3
Commercial Foods | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of agricultural land and facility					20.3
Fair value of land and facility					3.8
Impairment charge					16.5
Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge of technology license					$ 3.2