Pension And Postretirement Benefits (Details 8) (USD $) In Millions	12 Months Ended
	May 29, 2011	May 30, 2010
Change in the fair value of the Plan Assets
Fair Value, Beginning Balance	$ 153.8	$ 203.4
Net Realized and Unrealized Gains (Losses)	47.3	(6.6)
Fair Value, Net Purchases and Sales	271.2	(43.0)
Fair Value, Ending Balance	472.3	153.8
Real Estate [Member]
Change in the fair value of the Plan Assets
Fair Value, Beginning Balance	61.4	77.1
Net Realized and Unrealized Gains (Losses)	7.5	(17.0)
Fair Value, Net Purchases and Sales	1.4	1.3
Fair Value, Ending Balance	70.3	61.4
Multi-strategy hedge funds [Member]
Change in the fair value of the Plan Assets
Fair Value, Beginning Balance	22.1	68.9
Net Realized and Unrealized Gains (Losses)	34.1	2.4
Fair Value, Net Purchases and Sales	289.8	(49.2)
Fair Value, Ending Balance	346.0	22.1
Private equity [Member]
Change in the fair value of the Plan Assets
Fair Value, Beginning Balance	39.1	28.5
Net Realized and Unrealized Gains (Losses)	8.1	3.9
Fair Value, Net Purchases and Sales	8.8	6.7
Fair Value, Ending Balance	56.0	39.1
Contract with insurance companies [Member]
Change in the fair value of the Plan Assets
Fair Value, Beginning Balance	31.2	28.9
Net Realized and Unrealized Gains (Losses)	(2.4)	4.1
Fair Value, Net Purchases and Sales	(28.8)	(1.8)
Fair Value, Ending Balance		$ 31.2