Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2013	Oct. 31, 2012	Jan. 31, 2012
Fair Values of Financial Instruments
Securitization borrowings	$ 3,043.9	$ 3,574.8	$ 2,613.8
Current maturities of long-term borrowings	3,615.6	3,912.9	5,503.2
Long-term borrowings	14,370.1	14,769.9	11,321.3
Fair Value, Level 2
Fair Values of Financial Instruments
Securitization borrowings	3,050.0	3,584.0	2,624.0
Current maturities of long-term borrowings	3,690.0	3,947.0	5,553.0
Long-term borrowings	14,518.0	15,048.0	11,641.0
Fair Value, Level 3
Fair Values of Financial Instruments
Receivables financed - net	21,900	21,455	18,648
Retail notes securitized - net	3,032	3,615	2,679
Carrying Value
Fair Values of Financial Instruments
Receivables financed - net	21,915	21,472	18,655
Retail notes securitized - net	3,033	3,618	2,681
Securitization borrowings	3,044.0	3,575.0	2,614.0
Current maturities of long-term borrowings	3,616.0	3,913.0	5,503.0
Long-term borrowings	$ 14,370.0	$ 14,770.0	$ 11,321.0