UNAUDITED QUARTERLY FINANCIAL INFORMATION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Abstract]
Revenue	$ 9,496	$ 9,086	$ 9,243	$ 8,884	$ 9,729	$ 10,762	$ 10,919	$ 10,392	$ 36,709	$ 41,802	$ 40,534
Gross Profit	3,168	3,048	3,149	3,005	3,044	3,206	3,305	3,201	12,370	12,756
Net income attributable to Honeywell	$ 1,562	$ 1,624	$ 1,541	$ 1,416	$ 1,721	$ 2,338	$ 1,267	$ 1,439	$ 6,143	$ 6,765	$ 1,545
Earnings per common share - Basic	$ 2.19	$ 2.26	$ 2.13	$ 1.94	$ 2.34	$ 3.15	$ 1.70	$ 1.92	$ 8.52	$ 9.10	$ 2.03
Earnings per common share - assuming dilution	2.16	2.23	2.10	1.92	2.31	3.11	1.68	1.89	8.41	8.98	2.00
Cash dividends per common share	$ 0.900	$ 0.820	$ 0.820	$ 0.820	$ 0.820	$ 0.745	$ 0.745	$ 0.745	$ 3.360	$ 3.055	$ 2.740