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Fair Value Measurements (Details 3) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Jan. 31, 2012
Jan. 31, 2013
Oct. 31, 2012
Assets and liabilities measured at fair value      
Total Receivables $ 21,335.8 $ 24,948.3 $ 25,090.3
Fair Value, Nonrecurring Measurements | Level 3
     
Assets and liabilities measured at fair value      
Total Receivables 4.4 0.1 0.1
Loss on fair value of receivables 0.1    
Fair Value, Nonrecurring Measurements | Level 3 | Retail notes
     
Assets and liabilities measured at fair value      
Total Receivables 0.3    
Fair Value, Nonrecurring Measurements | Level 3 | Wholesale receivables
     
Assets and liabilities measured at fair value      
Total Receivables 4.1 0.1 0.1
Loss on fair value of receivables $ 0.1