EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income attributable to Honeywell	$ 1,721	$ 2,338	$ 1,267	$ 1,439	$ (2,519)	$ 1,345	$ 1,391	$ 1,328	$ 6,765	$ 1,545	$ 4,812
Weighted average shares outstanding									743.0	762.1	764.3
Earnings per share of common stock - basic	$ 2.34	$ 3.15	$ 1.7	$ 1.92	$ (3.32)	$ 1.76	$ 1.82	$ 1.74	$ 9.1	$ 2.03	$ 6.3
Assuming dilution
Net income attributable to Honeywell	$ 1,721	$ 2,338	$ 1,267	$ 1,439	$ (2,519)	$ 1,345	$ 1,391	$ 1,328	$ 6,765	$ 1,545	$ 4,812
Average shares
Weighted average shares outstanding									743.0	762.1	764.3
Dilutive securities issuable - stock plans									10.0	10.0	11.0
Total weighted average diluted shares outstanding									753.0	772.1	775.3
Earnings per share of common stock - assuming dilution	$ 2.31	$ 3.11	$ 1.68	$ 1.89	$ (3.32)	$ 1.74	$ 1.8	$ 1.72	$ 8.98	$ 2	$ 6.21
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations									2.5	2.8	7.5