Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015	Jul. 31, 2015
Fair Values of Financial Instruments
Securitization borrowings	$ 5,728.9	$ 4,590.0	$ 4,595.4
Current maturities of long-term borrowings	4,765.2	4,465.4	3,730.3
Long-term borrowings	16,947.2	16,980.5	16,659.0
Level 3
Fair Values of Financial Instruments
Receivables financed - net	22,778.8	24,126.5	25,455.9
Retail notes securitized - net	5,939.1	4,820.5	4,709.1
Level 2
Fair Values of Financial Instruments
Securitization borrowings	5,733.3	4,590.2	4,596.0
Current maturities of long-term borrowings	4,781.6	4,478.7	3,736.7
Long-term borrowings	17,178.6	17,007.6	16,756.8
Carrying Value
Fair Values of Financial Instruments
Receivables financed - net	22,812.7	24,148.0	25,525.1
Retail notes securitized - net	5,947.4	4,834.6	4,737.8
Securitization borrowings	5,728.9	4,590.0	4,595.4
Current maturities of long-term borrowings	4,765.2	4,465.4	3,730.3
Long-term borrowings	$ 16,947.2	$ 16,980.5	$ 16,659.0