Pension and Postretirement Benefits (Details 11) (USD $) In Millions, unless otherwise specified	May 27, 2012
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2013	$ (3.8)
2014	(3.2)
2015	(3.2)
2016	(3.2)
2017	(3.1)
Succeeding 5 years	(13.0)
Pension Benefits [Member]
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2013	154.2
2014	158.4
2015	163.2
2016	168.4
2017	174.2
Succeeding 5 years	966.1
Health Care and Life Insurance Benefit Payments [Member]
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2013	31.1
2014	28.6
2015	28.1
2016	27.5
2017	26.6
Succeeding 5 years	$ 115.9

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

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Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of the prescription drug subsidy receipts to be received after the fifth fiscal year following the latest fiscal year.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964

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-Section 50

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