UNAUDITED QUARTERLY FINANCIAL INFORMATION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Revenue	$ 8,900	$ 7,797	$ 7,477	$ 8,463	$ 9,496	$ 9,086	$ 9,243	$ 8,884	$ 32,637	$ 36,709	$ 41,802
Gross Profit	2,924	2,414	2,201	2,929	3,168	3,048	3,149	3,005	10,468	12,370
Net income attributable to Honeywell	$ 1,359	$ 758	$ 1,081	$ 1,581	$ 1,562	$ 1,624	$ 1,541	$ 1,416	$ 4,779	$ 6,143	$ 6,765
Earnings per common share - Basic	$ 1.94	$ 1.08	$ 1.54	$ 2.23	$ 2.19	$ 2.26	$ 2.13	$ 1.94	$ 6.79	$ 8.52	$ 9.10
Earnings per common share - assuming dilution	1.91	1.07	1.53	2.21	2.16	2.23	2.10	1.92	6.72	8.41	8.98
Cash dividends per common share	$ 0.930	$ 0.900	$ 0.900	$ 0.900	$ 0.900	$ 0.820	$ 0.820	$ 0.820	$ 3.630	$ 3.360	$ 3.055