Location and Amount of Gains (Losses) from Derivatives Not Designated As Hedging Instruments in Condensed Consolidated Statements of Earnings (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 26, 2012	Aug. 28, 2011
Total gain (loss) from derivative instruments not designated as hedging instruments	$ 108.6	$ 35.8
Commodity contracts | Sales
Total gain (loss) from derivative instruments not designated as hedging instruments	(0.7)
Commodity contracts | Cost of goods sold
Total gain (loss) from derivative instruments not designated as hedging instruments	119.2	42.5
Commodity contracts | Selling, general and administrative expenses
Total gain (loss) from derivative instruments not designated as hedging instruments	0.2
Foreign exchange contracts | Cost of goods sold
Total gain (loss) from derivative instruments not designated as hedging instruments	(4.1)	(7.0)
Foreign exchange contracts | Selling, general and administrative expenses
Total gain (loss) from derivative instruments not designated as hedging instruments	$ (6.0)	$ 0.3