EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Earnings Per Share [Abstract]
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
Weighted average shares outstanding									721.0	743.0	762.1
Earnings per share of common stock - 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 Share, Diluted [Abstract]
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
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average shares outstanding									721.0	743.0	762.1
Dilutive securities issuable - stock plans									9.3	10.0	10.0
Total weighted average diluted shares outstanding									730.3	753.0	772.1
Earnings per share of common stock - assuming dilution	$ 2.16	$ 2.23	$ 2.10	$ 1.92	$ 2.31	$ 3.11	$ 1.68	$ 1.89	$ 8.41	$ 8.98	$ 2.00
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations									2.5	2.5	2.8