PENSION AND POSTRETIREMENT BENEFITS (Level 3) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 26, 2013	May 27, 2012
Change in the fair value of the Plan assets
Fair Value, Beginning Balance	$ 528.1	$ 472.3
Business Combination	5.8
Realized Gains (Losses)	(21.9)	(5.8)
Unrealized Gains (Losses)	71.9	48.4
Net, Purchases and Sales	8.4	13.2
Fair Value, Ending Balance	592.3	528.1
Real estate funds
Change in the fair value of the Plan assets
Fair Value, Beginning Balance	83.3	70.3
Business Combination	0
Realized Gains (Losses)	(23.9)	0.3
Unrealized Gains (Losses)	26.6	2.1
Net, Purchases and Sales	5.5	10.6
Fair Value, Ending Balance	91.5	83.3
Multi-strategy hedge funds
Change in the fair value of the Plan assets
Fair Value, Beginning Balance	379.1	346.0
Business Combination	0
Realized Gains (Losses)	0.4	0.6
Unrealized Gains (Losses)	36.6	37.6
Net, Purchases and Sales	(2.2)	(5.1)
Fair Value, Ending Balance	413.9	379.1
Private equity
Change in the fair value of the Plan assets
Fair Value, Beginning Balance	64.2	56.0
Business Combination	5.8
Realized Gains (Losses)	1.6	(6.7)
Unrealized Gains (Losses)	8.2	9.2
Net, Purchases and Sales	(0.7)	5.7
Fair Value, Ending Balance	79.1	64.2
Private energy
Change in the fair value of the Plan assets
Fair Value, Beginning Balance	1.5
Business Combination	0
Realized Gains (Losses)	0
Unrealized Gains (Losses)	0.5
Net, Purchases and Sales	5.8
Fair Value, Ending Balance	7.8
Contracts with Insurance Companies
Change in the fair value of the Plan assets
Realized Gains (Losses)		0
Unrealized Gains (Losses)		(0.5)
Net, Purchases and Sales		2.0
Fair Value, Ending Balance		$ 1.5

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Amount of gain (loss) recognized in earnings, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).

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Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).

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- Definition

Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Amount of purchases, sales, issues, and settlements (net) which have taken place in relation to assets measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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-Name Statement of Financial Accounting Standard (FAS)

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-Subparagraph c

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