SEGMENT AND GEOGRAPHIC AREA DATA FOR THE YEARS ENDED OCTOBER 31, 2015, 2014 AND 2013 (Details) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2015 USD ($)	Jul. 31, 2015 USD ($)	Apr. 30, 2015 USD ($)	Jan. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)	Jul. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)	Jan. 31, 2014 USD ($)	Oct. 31, 2015 USD ($) item	Oct. 31, 2014 USD ($)	Oct. 31, 2013 USD ($)
SEGMENT AND GEOGRAPHIC AREA DATA FOR THE YEARS ENDED OCTOBER 31, 2015, 2014 AND 2013
Number of major business segments | item									3
Net Sales and Revenues
Total net sales	$ 5,932.0	$ 6,839.0	$ 7,399.0	$ 5,605.0	$ 8,043.0	$ 8,723.0	$ 9,246.0	$ 6,949.0	$ 25,775.2	$ 32,960.6	$ 34,997.9
Total	$ 6,715.0	$ 7,594.0	$ 8,171.0	$ 6,383.0	$ 8,965.0	$ 9,500.0	$ 9,948.0	$ 7,654.0	28,862.8	36,066.9	37,795.4
Other Revenues
Net Sales and Revenues
Total									497.0	529.0	448.0
Agriculture and Turf
Net Sales and Revenues
Total net sales									19,812.0	26,380.0	29,132.0
Agriculture and Turf | Intersegment Sales and Revenue
Net Sales and Revenues
Total									49.0	89.0	69.0
Construction and Forestry
Net Sales and Revenues
Total net sales									5,963.0	6,581.0	5,866.0
Construction and Forestry | Intersegment Sales and Revenue
Net Sales and Revenues
Total									1.0	1.0	2.0
Financial Services
Net Sales and Revenues
Total									2,591.0	2,577.0	2,349.0
Financial Services | Intersegment Sales and Revenue
Net Sales and Revenues
Total									$ 225.0	$ 228.0	$ 220.0