CAPITAL STOCK (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Changes in common stock
Common stock, beginning of period (in shares)				536,431,204				536,431,204	536,431,204	536,431,204	536,431,204
Common stock, end of period (in shares)	536,431,204				536,431,204				536,431,204	536,431,204	536,431,204
Common stock, beginning of period				$ 3,251.7				$ 3,106.0	$ 3,251.7	$ 3,106.0	$ 2,996.0
Stock options and other									100	146	110
Common stock, end of period	3,352.2				3,251.7				3,352.2	3,251.7	3,106.0
Common stock, authorized (in shares)	1,200,000,000				1,200,000,000				1,200,000,000	1,200,000,000
Preferred stock, authorized (in shares)	9,000,000								9,000,000
Common stock repurchase plans
Repurchase of common stock shares, May 2008 plan maximum authorization (in dollars)									5,000
Repurchase of common stock shares, May 2008 plan maximum authorization (in shares)	58,500,000								58,500,000
Closing common stock price (in dollars per share)	$ 85.44								$ 85.44
Common stock shares remaining to be repurchased under repurchase plan (in dollars)									2,489
Common stock shares remaining to be repurchased under repurchase plan (in shares)	29,100,000								29,100,000
Reconciliation of Basic and Diluted Net Income Per Share
Net income (loss) attributable to Deere & Company (in dollars)	688.0	788.0	1,056.0	533.0	670.0	712.0	904.0	514.0	3,064.7	2,799.9	1,865.0
Less income allocable to participating securities (in dollars)									0.8	1.0	0.7
Income (loss) allocable to common stock (in dollars)									$ 3,063.9	$ 2,798.9	$ 1,864.3
Average shares outstanding (in shares)									397,100,000	417,400,000	424,000,000
Basic per share (in dollars per share)	$ 1.76	$ 2.00	$ 2.64	$ 1.32	$ 1.63	$ 1.71	$ 2.15	$ 1.22	$ 7.72	$ 6.71	$ 4.40
Diluted Earnings Per Share
Average shares outstanding (in shares)									397,100,000	417,400,000	424,000,000
Effect of dilutive stock options (in shares)									4,400,000	5,000,000	4,600,000
Total potential shares outstanding (in shares)									401,500,000	422,400,000	428,600,000
Diluted per share (in dollars per share)	$ 1.75	$ 1.98	$ 2.61	$ 1.30	$ 1.62	$ 1.69	$ 2.12	$ 1.20	$ 7.63	$ 6.63	$ 4.35
Antidilutive incremental shares related to share-based compensation excluded from computation of earnings per share (in shares)									1,800,000		1,900,000