Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	May 27, 2012	May 29, 2011
Derivative assets and liabilities and amounts representing a right to reclaim cash collateral or obligation to return cash collateral were reflected in balance sheets:
Prepaid expenses and other current assets	$ 58.7	$ 71.5
Other accrued liabilities	215.4	92.2
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets not designated as hedging instruments	68.2	87.1
Total derivative assets	68.2	87.1
Total derivative liabilities not designated as hedging instruments	84.2	103.8
Total derivative liabilities	238.1	115.6
Designated as Hedging Instrument [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets
Total derivative liabilities	153.9	11.8
Interest Rate Contract [Member] | Other accrued liabilities [Member] | Designated as Hedging Instrument [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative liabilities	153.9	11.8
Interest Rate Contract [Member] | Prepaid expenses and other current assets [Member] | Designated as Hedging Instrument [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets
Commodity Contracts [Member] | Other accrued liabilities [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative liabilities not designated as hedging instruments	75.6	84.4
Commodity Contracts [Member] | Prepaid expenses and other current assets [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets not designated as hedging instruments	60.3	85.4
Foreign Exchange Contracts [Member] | Other accrued liabilities [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative liabilities not designated as hedging instruments	8.1	19.2
Foreign Exchange Contracts [Member] | Prepaid expenses and other current assets [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets not designated as hedging instruments	7.3	1.0
Other [Member] | Other accrued liabilities [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative liabilities not designated as hedging instruments	0.5	0.2
Other [Member] | Prepaid expenses and other current assets [Member]
Schedule of Derivative Instruments in Statement of Financial Position, gross, fair value
Total derivative assets not designated as hedging instruments	$ 0.6	$ 0.7