Pension and Postretirement Benefits (Details 11) (USD $) In Millions	May 29, 2011
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2012	$ (4.3)
2013	(4.5)
2014	(4.5)
2015	(4.6)
2016	(4.6)
Succeeding 5 years	(21.2)
Pension Benefits [Member]
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2012	148.2
2013	151.9
2014	156.2
2015	160.8
2016	165.7
Succeeding 5 years	915.7
Health Care and Life Insurance Benefit Payments [Member]
Estimated future gross benefit payments and Medicare Part D subsidy receipts
2012	32.6
2013	33.7
2014	33.3
2015	32.7
2016	31.8
Succeeding 5 years	$ 139.8