DISCONTINUED OPERATIONS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended											6 Months Ended	12 Months Ended
	Aug. 28, 2016	May 29, 2016	Feb. 28, 2016	Nov. 29, 2015	Aug. 30, 2015	May 31, 2015	Feb. 22, 2015	Aug. 24, 2014	May 25, 2014	Nov. 24, 2013	Feb. 24, 2013	Nov. 23, 2014	May 29, 2016	May 31, 2015	May 25, 2014	Nov. 01, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges													$ 62.6	$ 36.0	$ 118.9
Gain (loss) on extinguishment of debt			$ (23.9)										(23.9)	(24.6)	4.0
Deferred tax assets, net		$ 2,368.2				$ 603.8							2,368.2	603.8
Impairment, goodwill														20.9
Net sales		2,827.5	2,924.1	$ 3,095.1	$ 2,796.2	3,125.5	$ 2,907.3	$ 2,765.5				$ 3,138.7	11,642.9	11,937.0	11,838.2
Income tax expense (benefit)													225.4	362.1	178.3
Noncurrent assets held for sale		225.8				4,486.0							225.8	4,486.0
Private Brands
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration																$ 2,600.0
Asset impairment charges													1,920.0
Asset impairment charges, after tax													1,440.0
Deferred tax assets, net			1,540.0
Increase (decrease) in valuation allowance		(20.7)
Impairment, goodwill														1,510.0	593.2
Impairment of long-lived assets to be disposed of														57.6	3.0
Income (loss) from operation of discontinued operations before income taxes													(1,755.0)	(1,495.8)	(409.7)
Noncurrent assets held for sale						4,246.9								4,246.9
Spicetec and JM Swank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Increase (decrease) in valuation allowance		(147.3)
Spicetec
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncurrent assets held for sale		145.9				148.2							145.9	148.2
JM Swank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncurrent assets held for sale		73.0				74.3							73.0	74.3
Medallion
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business															32.0
Pretax gain (loss) on sale															5.8
After-tax gain (loss) on sale															3.5
Goodwill and intangible asset impairment, before tax															25.4
Goodwill and intangible asset impairment, after tax															15.2
Net sales															59.1
Income (loss) from operation of discontinued operations before income taxes															5.9
Income tax expense (benefit)															(10.2)
Lightlife
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business														54.7
Pretax gain (loss) on sale														(32.1)
After-tax gain (loss) on sale														(19.8)
Net sales															11.2
Income (loss) from operation of discontinued operations before income taxes														(0.7)	1.9
Income tax expense (benefit)														(0.3)	14.9
Ralcorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Early repayment of senior debt			33.9
Gain (loss) on extinguishment of debt			(5.4)
2020 Maturity | Senior Notes | Ralcorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Early repayment of senior debt			$ 17.2
Interest rate			4.95%
Effective interest rate			2.83%
2039 Maturity | Senior Notes | Ralcorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Early repayment of senior debt			$ 16.7
Interest rate			6.625%
Effective interest rate			4.82%
Commercial Foods
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges									$ 5.1	$ 8.9	$ 10.2
Impairment, goodwill														0.0
Net sales													4,417.8	4,371.7	4,241.9
Commercial Foods | Scenario, Forecast | Spicetec
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business, net	$ 316.5
Commercial Foods | Scenario, Forecast | JM Swank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business, net	$ 162.4
Corporate Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncurrent assets held for sale		$ 6.9											6.9
Consumer Foods
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment, goodwill														20.9
Net sales													$ 7,225.1	7,565.3	$ 7,596.3
Noncurrent assets held for sale						$ 16.7								$ 16.7