UNAUDITED QUARTERLY FINANCIAL INFORMATION (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selected Quarterly Financial Information Abstract
Net sales	$ 10,266	$ 10,108	$ 10,253	$ 9,679	$ 10,387	$ 9,647	$ 9,693	$ 9,328	$ 40,306	$ 39,055	$ 37,665
Gross Profit	2,700	2,980	2,957	2,712	2,775	2,705	2,666	2,545	11,349	10,691
Net income attributable to Honeywell	$ 956	$ 1,167	$ 1,099	$ 1,017	$ 947	$ 990	$ 1,021	$ 966	$ 4,239	$ 3,924	$ 2,926
Earnings per share - Basic	$ 1.22	$ 1.49	$ 1.40	$ 1.30	$ 1.20	$ 1.26	$ 1.30	$ 1.23	$ 5.40	$ 4.99	$ 3.74
Earnings per share - assuming dilution	$ 1.20	$ 1.47	$ 1.38	$ 1.28	$ 1.19	$ 1.24	$ 1.28	$ 1.21	$ 5.33	$ 4.92	$ 3.69
Dividends paid per share	$ 0.5175	$ 0.4500	$ 0.4500	$ 0.4500	$ 0.4510	$ 0.4100	$ 0.4100	$ 0.4100	$ 1.87	$ 1.68	$ 1.53
Market Price [Abstract]
Market price per share high	$ 101.98	$ 97.34	$ 95.81	$ 95.44	$ 91.37	$ 86.79	$ 80.85	$ 75.48	$ 101.98	$ 91.37
Market price per share low	$ 85.11	$ 90.56	$ 90.36	$ 88.47	$ 81.45	$ 77.88	$ 71.47	$ 64.75	$ 85.11	$ 64.75