Income Taxes (Schedule of deffered tax assets and liabilities) (Details) (USD $) In Millions, unless otherwise specified	May 26, 2013	May 27, 2012
Tax effects of temporary differences that give rise to deferred tax assets and liabilities [Abstract]
Accrued liabilities	$ 154.6	$ 86.9
Compensation and employee benefits	619.2	635.4
Unrealized hedge losses	6.9	26.4
Pension liability	112.5	240.1
Tax credit carryforwards	78.0	86.5
Stock, partnership, and miscellaneous investments	461.1	534.3
Capital losses	13.6	90.7
Net operating losses	65.1	130.6
Other	138.8	151.9
Gross deferred tax assets	1,649.8	1,982.8
Valuation allowance	232.8	384.4
Net deferred tax assets	1,417.0	1,598.4
Brands	1,380.4	1,292.8
Fixed assets	537.4	500.1
Intangible assets	168.3	289.1
Tax lease transactions	55.1	56.5
Inventories	52.0	55.9
Stock, partnership, and miscellaneous investments	456.7	468.2
Unrealized hedges	0	0
Other	28.2	47.5
Gross deferred tax liabilities	2,678.1	2,710.1
Net deferred tax liability	$ 1,261.1	$ 1,111.7