LONG-TERM DEBT AND CREDIT AGREEMENTS (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended			3 Months Ended																									12 Months Ended		12 Months Ended		12 Months Ended
	Mar. 31, 2011	Feb. 28, 2011	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2010 Notes 7.50% due 2010 [Member]	Dec. 31, 2011 Notes 6.125% due 2011 [Member]	Dec. 31, 2010 Notes 6.125% due 2011 [Member]	Mar. 31, 2011 Notes 5.625% due 2012 [Member]	Dec. 31, 2011 Notes 5.625% due 2012 [Member]	Dec. 31, 2010 Notes 5.625% due 2012 [Member]	Dec. 31, 2011 Notes 4.25% due 2013 [Member]	Dec. 31, 2010 Notes 4.25% due 2013 [Member]	Dec. 31, 2011 Notes 3.875% due 2014 [Member]	Dec. 31, 2010 Notes 3.875% due 2014 [Member]	Dec. 31, 2011 Notes 5.40% due 2016 [Member]	Dec. 31, 2010 Notes 5.40% due 2016 [Member]	Dec. 31, 2011 Notes 5.30% due 2017 [Member]	Dec. 31, 2010 Notes 5.30% due 2017 [Member]	Dec. 31, 2011 Notes 5.30% due 2018 [Member]	Dec. 31, 2010 Notes 5.30% due 2018 [Member]	Dec. 31, 2011 Notes 5.00% due 2019 [Member]	Dec. 31, 2010 Notes 5.00% due 2019 [Member]	Dec. 31, 2011 Industrial development bond obligations, floating rate maturing at various dates through 2037 [Member]	Dec. 31, 2010 Industrial development bond obligations, floating rate maturing at various dates through 2037 [Member]	Dec. 31, 2011 Debentures 6.625% due 2028 [Member]	Dec. 31, 2010 Debentures 6.625% due 2028 [Member]	Dec. 31, 2011 Debentures 9.065% due 2033 [Member]	Dec. 31, 2010 Debentures 9.065% due 2033 [Member]	Dec. 31, 2011 Notes 5.70% due 2036 [Member]	Dec. 31, 2010 Notes 5.70% due 2036 [Member]	Dec. 31, 2011 Notes 5.70% due 2037 [Member]	Dec. 31, 2010 Notes 5.70% due 2037 [Member]	Dec. 31, 2011 Notes 4.25% due 2021 [Member]	Dec. 31, 2010 Notes 4.25% due 2021 [Member]	Dec. 31, 2011 Notes 5.375% due 2041 [Member]	Dec. 31, 2010 Notes 5.375% due 2041 [Member]	Dec. 31, 2011 Other including capitalized leases, .6% to 9.5% maturing at various dates through 2023 [Member]	Dec. 31, 2010 Other including capitalized leases, .6% to 9.5% maturing at various dates through 2023 [Member]
Debt Instrument [Line Items]
Senior Notes							$ 0	$ 500			$ 400	$ 600	$ 600	$ 600	$ 600	$ 400	$ 400	$ 400	$ 400	$ 900	$ 900	$ 900	$ 900							$ 550	$ 550	$ 600	$ 600	$ 800	$ 0	$ 600	$ 0
Industrial development bond																								37	46
Debentures																										216	216	51	51
Other long term debt																																						242	115
Total Long-term debt				6,896	6,278
Less current portion				(15)	(523)
Total Noncurrent Debt				6,881	5,755
Various interest rates							6.125%			5.625%		4.25%		3.875%		5.40%		5.30%		5.30%		5.00%				6.625%		9.065%		5.70%		5.70%		4.25%		5.375%
Interest rate range minimum																																						0.60%
Interest rate range maximum																																						9.50%
Repayment of notes						1,000	500		400
Proceeds from Issuance of Long-term Debt		1,400
Debt Instrument, Issuance Date																																		February 2011		February 2011
Long Term Debt By Maturity Abstract
2012				15
2013				628
2014				613
2015				1
2016				455
Thereafter				5,184
Total Non-Current				6,896	6,278
Less current portion				(15)	(523)
Total Long-term debt				6,881	5,755
Long Term Debt Paragraph Details [Abstract]
Borrowing Capacity Description	The Credit Agreement is maintained for general corporate purposes, including support for the issuance of commercial paper, and replaces the previous $2,800 million five year credit agreement dated May 14, 2007 (“Prior Agreement”).
Maximum Borrowing Capacity	3,500		3,500
Sub-Limit for Letters of Credit	700		700
Line Of Credit Facility Covenant Terms	Additionally, each of the banks has the right to terminate its commitment to lend additional funds or issue letters of credit under the agreement if any person or group acquires beneficial ownership of 30 percent or more of our voting stock, or, during any 12-month period, individuals who were directors of Honeywell at the beginning of the period cease to constitute a majority of the Board of Directors.
Facility expiration date	March 31, 2016
Facility fee percent	0.125%
Payments of Debt Extinguishment Costs			29	29
Payments of Debt Issuance Costs		19
Line of Credit Facility, Current Borrowing Capacity	$ 2,800		$ 2,800
Interest rates applied to borrowings				Interest on borrowings under the Credit Agreement would be determined, at Honeywell’s option, by (a) a competitive bidding procedure; (b) the highest of the floating base rate publicly announced by Citibank, N.A. 0.5 percent above the Federal funds rate or Libor plus 1 percent; or (c) the Eurocurrency rate plus Honeywell’s credit default swap spread, subject to a floor and a cap (applicable margin).