Derivative Financial Instruments - 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		6 Months Ended
	Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments	$ 11.9	$ 42.7	$ 120.5	$ 78.5
Commodity contracts [Member] | Cost of goods sold [Member]
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments	7.1	30.6	126.3	73.1
Commodity contracts [Member] | Selling, General and Administrative Expenses [Member]
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments	(0.1)	(0.1)	0.1	(0.1)
Commodity contracts [Member] | Sales [Member]
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments			(0.7)
Foreign exchange contracts [Member] | Cost of goods sold [Member]
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments	5.4	6.0	1.3	(1.0)
Foreign exchange contracts [Member] | Selling, General and Administrative Expenses [Member]
Derivatives, Fair Value [Line Items]
Total gain from derivative instruments not designated as hedging instruments	$ (0.5)	$ 6.2	$ (6.5)	$ 6.5