EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income attributable to Honeywell	$ 1,427	$ 1,581
Weighted average shares outstanding	696,200,000	709,600,000
Earnings per share of common stock - basic (in dollars per share)	$ 2.05	$ 2.23
Assuming dilution
Net income attributable to Honeywell	$ 1,427	$ 1,581
Average shares
Weighted average shares outstanding	696,200,000	709,600,000
Dilutive securities issuable - stock plans	8,300,000	7,400,000
Total weighted average shares outstanding	704,500,000	717,000,000.0
Earnings per share of common stock - assuming dilution (in dollars per share)	$ 2.03	$ 2.21
Earnings Per Share Paragraph Details [Abstract]
Stock options excluded from diluted computations	1,000,000.0	4,300,000
Shares outstanding	694,600,000	701,800,000
Common Stock Shares Issued	957,600,000	957,600,000