Derivative Financial Instruments - Schedule of Derivative Instruments in Statement of Financial Position, Gross, Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Nov. 25, 2012	May 27, 2012
Derivatives, Fair Value [Line Items]
Total derivative assets	$ 81.9	$ 68.2
Total derivative liabilities	201.6	238.1
Designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets
Total derivative liabilities	158.9	153.9
Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets not designated as hedging instruments	81.9	68.2
Total derivative liabilities not designated as hedging instruments	42.7	84.2
Interest rate contracts [Member] | Other accrued liabilities [Member] | Designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities	158.9	153.9
Interest rate contracts [Member] | Prepaid expenses and other current assets [Member] | Designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets
Commodity contracts [Member] | Other accrued liabilities [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities not designated as hedging instruments	34.7	75.6
Commodity contracts [Member] | Prepaid expenses and other current assets [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets not designated as hedging instruments	77.6	60.3
Foreign exchange contracts [Member] | Other accrued liabilities [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities not designated as hedging instruments	7.9	8.1
Foreign exchange contracts [Member] | Prepaid expenses and other current assets [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets not designated as hedging instruments	3.0	7.3
Other [Member] | Other accrued liabilities [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities not designated as hedging instruments	0.1	0.5
Other [Member] | Prepaid expenses and other current assets [Member] | Total derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets not designated as hedging instruments	$ 1.3	$ 0.6