EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income attributable to Honeywell	$ 1,438	$ 1,326
Weighted average shares outstanding	750.6	763.1
Earnings per share of common stock - basic	$ 1.92	$ 1.74
Assuming dilution
Net income attributable to Honeywell	$ 1,438	$ 1,326
Average shares
Weighted average shares outstanding	750.6	763.1
Dilutive securities issuable - stock plans	10.4	10.8
Total weighted average diluted shares outstanding	761.0	773.9
Earnings per share of common stock - assuming dilution	$ 1.89	$ 1.71
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations	1.1	2.1
Shares outstanding	746.9	762.3
Common Stock Shares Issued	957.6	957.6