LONG-TERM DEBT AND CREDIT AGREEMENTS (Details) (USD $) In Millions, unless otherwise specified			1 Months Ended																												9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Apr. 30, 2012 Syndicate Of Banks [Member] Revolving Credit Facility [Member]	Mar. 31, 2011 Syndicate Of Banks [Member] Revolving Credit Facility [Member]	Sep. 30, 2012 Notes 4.25% due 2013 [Member]	Dec. 31, 2011 Notes 4.25% due 2013 [Member]	Sep. 30, 2012 Notes 3.875% due 2014 [Member]	Dec. 31, 2011 Notes 3.875% due 2014 [Member]	Sep. 30, 2012 Notes 5.40% due 2016 [Member]	Dec. 31, 2011 Notes 5.40% due 2016 [Member]	Sep. 30, 2012 Notes 5.30% due 2017 [Member]	Dec. 31, 2011 Notes 5.30% due 2017 [Member]	Sep. 30, 2012 Notes 5.30% due 2018 [Member]	Dec. 31, 2011 Notes 5.30% due 2018 [Member]	Sep. 30, 2012 Notes 5.00% due 2019 [Member]	Dec. 31, 2011 Notes 5.00% due 2019 [Member]	Sep. 30, 2012 Industrial development bond obligations, floating rate maturing at various dates through 2037 [Member]	Dec. 31, 2011 Industrial development bond obligations, floating rate maturing at various dates through 2037 [Member]	Sep. 30, 2012 Debentures 6.625% due 2028 [Member]	Dec. 31, 2011 Debentures 6.625% due 2028 [Member]	Sep. 30, 2012 Debentures 9.065% due 2033 [Member]	Dec. 31, 2011 Debentures 9.065% due 2033 [Member]	Sep. 30, 2012 Notes 5.70% due 2036 [Member]	Dec. 31, 2011 Notes 5.70% due 2036 [Member]	Sep. 30, 2012 Notes 5.70% due 2037 [Member]	Dec. 31, 2011 Notes 5.70% due 2037 [Member]	Sep. 30, 2012 Notes 4.25% due 2021 [Member]	Dec. 31, 2011 Notes 4.25% due 2021 [Member]	Sep. 30, 2012 Notes 5.375% due 2041 [Member]	Dec. 31, 2011 Notes 5.375% due 2041 [Member]	Sep. 30, 2012 Other including capitalized leases, .6% to 9.5% maturing at various dates through 2023 [Member]	Dec. 31, 2011 Other including capitalized leases, .6% to 9.5% maturing at various dates through 2023 [Member]
Debt Instrument [Line Items]
Senior Notes					$ 600	$ 600	$ 600	$ 600	$ 400	$ 400	$ 400	$ 400	$ 900	$ 900	$ 900	$ 900							$ 550	$ 550	$ 600	$ 600	$ 800	$ 800	$ 600	$ 600
Industrial development bond																	37	37
Debentures																			216	216	51	51
Other long term debt																															361	242
Total long-term debt, including current portion	7,015	6,896
Less: Current portion	624	15
Long-term debt	6,391	6,881
Various interest rates					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%
Line of Credit Facility [Line Items]
Borrowing Capacity Description			The Credit Agreement is maintained for general corporate purposes and amends and restates the previous $2,800 million five year credit agreement dated March 31, 2011 (“Prior Agreement”). There have been no borrowings under the Credit Agreement or the Prior Agreement.
Maximum Borrowing Capacity			3,500	2,800
Sub-Limit for Letters of Credit			700
Line of credit facility, covenant terms			The Credit Agreement does not restrict our ability to pay dividends and contains no financial covenants. The failure to comply with customary conditions or the occurrence of customary events of default contained in the credit agreement would prevent any further borrowings and would generally require the repayment of any outstanding borrowings under the credit agreement. Such events of default include: (a) non-payment of credit agreement debt, interest or fees; (b) non-compliance with the terms of the credit agreement covenants; (c) cross-default to other debt in certain circumstances; (d) bankruptcy or insolvency; and (e) defaults upon obligations under Employee Retirement Income Security Act. 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. The Credit Agreement has substantially the same material terms and conditions as the Prior Agreement with an improvement in pricing and an extension of maturity. Loans under the Credit Agreement are required to be repaid no later than April 2, 2017, unless such date is extended pursuant to the terms of the Credit Agreement. We have agreed to pay a facility fee of 0.08 percent per annum on the aggregate commitment.
Facility expiration date			Apr. 02, 2017
Facility fee percent			0.08%
Line of credit facility, current borrowing capacity			3,000
Interest rates applied to borrowings			Revolving credit borrowings under the Credit Agreement would bear interest, at Honeywell’s option, (A) (1) at a rate equal to the highest of (a) the floating base rate publicly announced by Citibank, N.A., (b) 0.5 percent above the Federal funds rate or (c) LIBOR plus 1.00 percent, plus (2) a margin based on Honeywell’s credit default swap mid-rate spread and subject to a floor and a cap as set forth in the Credit Agreement (the “Applicable Margin”) minus 1.00 percent, provided such margin shall not be less than zero; or (B) at a rate equal to LIBOR plus the Applicable Margin; or (C) by a competitive bidding procedure
Facility initiation date			Apr. 02, 2012
Minimum ownership percentage to trigger termination option			30.00%
Long Term Debt By Maturity Abstract
2012	15
2013	654
2014	641
2015	10
2016	457
Thereafter	5,238
Total long-term debt, including current portion	7,015	6,896
Less: Current portion	624	15
Total Long-term portion	$ 6,391	$ 6,881