REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 7,797	$ 9,086	$ 23,737	$ 27,213
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 5,885	$ 6,793	$ 17,933	$ 20,496
Disaggregation of revenue, timing of recognition - percentage	76.00%	75.00%	76.00%	75.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	61.00%	62.00%	61.00%	61.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	15.00%	13.00%	15.00%	14.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,912	$ 2,293	$ 5,804	$ 6,717
Disaggregation of revenue, timing of recognition - percentage	24.00%	25.00%	24.00%	25.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	7.00%	8.00%	8.00%	9.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	17.00%	17.00%	16.00%	16.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,662	$ 3,544	$ 8,566	$ 10,393
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	406	772	1,527	2,265
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	774	1,452	2,807	4,234
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,482	1,320	4,232	3,894
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,305	1,415	3,763	4,254
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	751	823	2,163	2,476
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	554	592	1,600	1,778
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,252	2,670	6,867	7,977
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	461	717	1,572	2,030
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,135	1,283	3,379	3,818
Performance Materials and Technologies | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	261	256	786	790
Performance Materials and Technologies | Fluorine Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	395	414	1,130	1,339
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	1,578	1,457	4,541	4,589
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	599	558	1,612	1,653
Safety and Productivity Solutions | Productivity Solutions and Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	322	307	877	926
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	445	383	1,457	1,361
Safety and Productivity Solutions | Sensing & Internet-of-Things (IoT)
Disaggregation of Revenue [Line Items]
Net Sales	$ 212	$ 209	$ 595	$ 649