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SEGMENT REPORTING (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010	Oct. 31, 2009
Net Sales and Revenues
Total net sales	$ 7,721.6	$ 6,224.0	$ 21,563.0	$ 17,009.5
% Change - Net sales (as a percent)	24.00%		27.00%
Other revenues	100	85	290	262
% Change - Other revenues (as a percent)	18.00%		11.00%
Total	8,371.9	6,836.9	23,400.8	18,802.6
% Change - Revenues (as a percent)	22.00%		24.00%
Operating Profit
Total operating profit	1,163	1,038	3,412	2,553
% Change - Operating profit (as a percent)	12.00%		34.00%
Other reconciling items	(451)	(421)	(1,282)	(1,145)
% Change - Other reconciling items (as a percent)	7.00%		12.00%
Net Income Attributable to Deere & Company	712.3	617.0	2,130.3	1,407.7
% Change - Net income or loss attributable to Deere & Company (as a percent)	15.00%		51.00%
Identifiable Assets
Total Assets	47,135.1	41,810.3	47,135.1	41,810.3	43,266.8
% Change - Identifiable assets (as a percent)			13.00%
Agriculture and Turf
Net Sales and Revenues
Total net sales	6,371.0	5,217.0	17,740.0	14,462.0
% Change - Net sales (as a percent)	22.00%		23.00%
Operating Profit
Total operating profit	859	824	2,579	2,128
% Change - Operating profit (as a percent)	4.00%		21.00%
Identifiable Assets
Total Assets	9,399.0	7,255.0	9,399.0	7,255.0
% Change - Identifiable assets (as a percent)			30.00%
Intersegment sales and revenues	26	16	71	42
% Change - Intersegment sales and revenues (as a percent)	63.00%		69.00%
Construction and Forestry
Net Sales and Revenues
Total net sales	1,351.0	1,007.0	3,823.0	2,547.0
% Change - Net sales (as a percent)	34.00%		50.00%
Operating Profit
Total operating profit	110	66	304	65
% Change - Operating profit (as a percent)	67.00%		368.00%
Identifiable Assets
Total Assets	2,735.0	2,186.0	2,735.0	2,186.0
% Change - Identifiable assets (as a percent)			25.00%
Intersegment sales and revenues	4	3	15	6
% Change - Intersegment sales and revenues (as a percent)	33.00%		150.00%
Financial Services.
Net Sales and Revenues
Total net sales	550.0	528.0	1,548.0	1,532.0	2,073.0	2,029.0
% Change - Net sales (as a percent)	4.00%		1.00%
Operating Profit
Total operating profit	194	148	529	360	499	242
% Change - Operating profit (as a percent)	31.00%		47.00%
Identifiable Assets
Total Assets	29,236.0	26,707.0	29,236.0	26,707.0	27,507.0	25,964.0
% Change - Identifiable assets (as a percent)			9.00%
Intersegment sales and revenues	57	62	164	173	224	255
% Change - Intersegment sales and revenues (as a percent)	(8.00%)		(5.00%)
Corporate
Identifiable Assets
Total Assets	5,765.0	5,662.0	5,765.0	5,662.0
% Change - Identifiable assets (as a percent)			2.00%
Equipment Operations
Net Sales and Revenues
Total net sales	7,721.6	6,224.0	21,563.0	17,009.5
Total	7,855.7	6,330.1	21,954.3	17,338.7
Operating Profit
Net Income Attributable to Deere & Company	712.3	617.0	2,130.3	1,407.7
Identifiable Assets
Total Assets	24,224.2	20,477.5	24,224.2	20,477.5	21,540.9
Equipment Operations \| Outside U.S. and Canada:
Net Sales and Revenues
Total net sales	3,364.0	2,255.0	8,860.0	6,307.0
% Change - Net sales (as a percent)	49.00%		40.00%
Operating Profit
Total operating profit	$ 300	$ 208	$ 848	$ 533
% Change - Operating profit (as a percent)	44.00%		59.00%