Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Jul. 31, 2013	Oct. 31, 2012	Jul. 31, 2012
Fair Values of Financial Instruments
Securitization borrowings	$ 3,780.1	$ 3,574.8	$ 3,028.0
Current maturities of long-term borrowings	3,741.4	3,912.9	3,632.1
Long-term borrowings	14,218.7	14,769.9	13,771.8
Fair Value, Level 2
Fair Values of Financial Instruments
Securitization borrowings	3,778.0	3,584.0	3,038.0
Current maturities of long-term borrowings	3,779.0	3,947.0	3,667.0
Long-term borrowings	14,346.0	15,048.0	14,058.0
Fair Value, Level 3
Fair Values of Financial Instruments
Receivables financed - net	24,434	21,455	21,328
Retail notes securitized - net	3,868	3,615	3,165
Carrying Value
Fair Values of Financial Instruments
Receivables financed - net	24,531	21,472	21,339
Retail notes securitized - net	3,891	3,618	3,164
Securitization borrowings	3,780.0	3,575.0	3,028.0
Current maturities of long-term borrowings	3,741.0	3,913.0	3,632.0
Long-term borrowings	$ 14,219.0	$ 14,770.0	$ 13,772.0