EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income attributable to Honeywell	$ 758	$ 1,624	$ 3,420	$ 4,581
Weighted average shares outstanding	702,600,000	717,600,000	704,800,000	723,500,000
Earnings per share of common stock - basic (in dollars per share)	$ 1.08	$ 2.26	$ 4.85	$ 6.33
Assuming dilution
Net income attributable to Honeywell	$ 758	$ 1,624	$ 3,420	$ 4,581
Average shares
Weighted average shares outstanding	702,600,000	717,600,000	704,800,000	723,500,000
Dilutive securities issuable - stock plans	7,000,000.0	9,100,000	6,800,000	9,300,000
Total weighted average shares outstanding	709,600,000	726,700,000	711,600,000	732,800,000
Earnings per share of common stock - assuming dilution (in dollars per share)	$ 1.07	$ 2.23	$ 4.81	$ 6.25
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations	7,100,000	2,900,000	6,400,000	3,200,000
Shares outstanding	701,700,000	714,500,000	701,700,000	714,500,000
Common Stock Shares Issued	957,600,000	957,600,000	957,600,000	957,600,000