Supplemental Information (Tables)
 12 Months Ended
May 29, 2011
Supplemental (Tables)  
Loans Notes Trade And Other Receivables Disclosure [Text Block]
In Millions May 29, 2011  May 30, 2010
Receivables:     
From customers$ 1,178.6 $ 1,057.4
Less allowance for doubtful accounts  (16.3)   (15.8)
Total$ 1,162.3 $ 1,041.6
Inventory Disclosure [Text Block]
In Millions May 29, 2011  May 30, 2010
Inventories:     
Raw materials and packaging$ 286.2 $ 247.5
Finished goods  1,273.6   1,131.4
Grain  218.0   107.4
Excess of FIFO or weighted-average cost over LIFO cost (a)  (168.5)   (142.3)
Total$ 1,609.3 $ 1,344.0
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block]
In Millions May 29, 2011  May 30, 2010
Prepaid expenses and other current assets:     
Prepaid expenses$ 161.0 $ 127.5
Accrued interest receivable, including interest rate swaps  29.0   64.9
Derivative receivables, primarily commodity-related  109.1   48.8
Other receivables  104.7   101.4
Grain contracts  57.3   11.4
Miscellaneous  22.4   24.5
Total$ 483.5 $ 378.5
Property Plant And Equipment [Text Block]
In Millions May 29, 2011  May 30, 2010
Land, buildings, and equipment:     
Land$ 61.2 $ 58.0
Buildings  1,777.7   1,653.8
Buildings under capital lease  25.0   19.6
Equipment  4,719.7   4,405.6
Equipment under capital lease  18.9   25.0
Capitalized software  367.7   318.7
Construction in progress  521.9   469.0
Total land, buildings, and equipment  7,492.1   6,949.7
Less accumulated depreciation  (4,146.2)   (3,822.0)
Total$ 3,345.9 $ 3,127.7
Schedule Of Other Assets Noncurrent [Text Block]
In Millions May 29, 2011  May 30, 2010
Other assets:     
Pension assets$ 128.6 $ 2.2
Investments in and advances to joint ventures  519.1   398.1
Life insurance  87.2   88.2
Derivative receivables  13.3   130.1
Miscellaneous  114.3   144.8
Total$ 862.5 $ 763.4
Accounts Payable And Accrued Liabilities Disclosure [Text Block]
In Millions May 29, 2011  May 30, 2010
Other current liabilities:     
Accrued payroll$ 303.3 $ 331.4
Accrued interest  114.0   136.5
Accrued trade and consumer promotions  463.0   555.2
Accrued taxes  80.4   440.2
Derivative payable  34.8   18.1
Accrued customer advances  36.4   25.5
Grain contracts  28.7   12.7
Miscellaneous  260.9   242.6
Total$ 1,321.5 $ 1,762.2
Other Liabilities Disclosure [Text Block]
In Millions May 29, 2011  May 30, 2010
Other noncurrent liabilities:     
Interest rate swaps$ 22.2 $ 180.2
Accrued compensation and benefits, including obligations for underfunded other postretirement and postemployment benefit plans  1,412.8   1,588.1
Accrued income taxes  233.3   276.3
Miscellaneous  64.9   74.1
Total$ 1,733.2 $ 2,118.7
Statement Of Earnings Supplemental Disclosures [Text Block]
  Fiscal Year
In Millions 2011  2010  2009
Depreciation and amortization$ 472.6 $ 457.1 $ 453.6
Research and development expense  235.0   218.3   208.2
Advertising and media expense (including production and communication costs)  843.7   908.5   732.1
Interest Net [Text Block]
  Fiscal Year
Expense (Income), in Millions 2011  2010  2009
Interest expense$ 360.9 $ 374.5 $ 409.5
Capitalized interest  (7.2)   (6.2)   (5.1)
Interest income  (7.4)   (6.8)   (21.6)
Loss on debt repurchase  -   40.1   -
Interest, net$ 346.3 $ 401.6 $ 382.8
Statements of Cash Flows [Text Block]
 Fiscal Year
In Millions 2011  2010 2009
Cash interest payments$ 333.1 $ 384.1$ 292.8
Cash paid for income taxes  699.3   672.5  395.3