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SEGMENT AND GEOGRAPHIC AREA DATA FOR THE YEARS ENDED OCTOBER 31, 2012, 2011 AND 2010 (Details 4) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Operating Segments      
Depreciation and amortization expense $ 1,004.2 $ 914.9 $ 914.8
Equity in income (loss) of unconsolidated affiliates (3.4) 8.6 10.7
Identifiable operating assets 56,265.8 48,207.4 43,267.0
Capital additions 1,376 1,059 802
Investments in unconsolidated affiliates 215.0 201.7 245.0
Agriculture and Turf
      
Operating Segments      
Depreciation and amortization expense 550.0 505.0 470.0
Equity in income (loss) of unconsolidated affiliates (2.0) 5.0 13.0
Identifiable operating assets 10,429.0 9,178.0 7,593.0
Capital additions 1,145 909 729
Investments in unconsolidated affiliates 32.0 35.0 66.0
Construction and Forestry
      
Operating Segments      
Depreciation and amortization expense 93.0 82.0 79.0
Equity in income (loss) of unconsolidated affiliates (2.0) 3.0 (3.0)
Identifiable operating assets 3,365.0 2,915.0 2,353.0
Capital additions 228 148 73
Investments in unconsolidated affiliates 174.0 159.0 172.0
Financial Services
      
Operating Segments      
Depreciation and amortization expense 361.0 328.0 366.0
Equity in income (loss) of unconsolidated affiliates 1.0 1.0 1.0
Identifiable operating assets 34,495.0 29,795.0 27,507.0
Capital additions 3 2  
Investments in unconsolidated affiliates 9.0 8.0 7.0
Corporate
      
Operating Segments      
Identifiable operating assets $ 7,977.0 [1] $ 6,319.0 [1] $ 5,814.0 [1]
[1] Corporate assets are primarily the equipment operations, retirement benefits, deferred income tax assets, marketable securities and cash and cash equivalents as disclosed in Note 31, net of certain intercompany eliminations.