REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 7,477	$ 9,243	$ 15,940	$ 18,127
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 5,743	$ 6,990	$ 12,048	$ 13,703
Disaggregation of revenue, timing of recognition - percentage	77.00%	75.00%	76.00%	76.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	61.00%	61.00%	61.00%	61.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	16.00%	14.00%	15.00%	15.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,734	$ 2,253	$ 3,892	$ 4,424
Disaggregation of revenue, timing of recognition - percentage	23.00%	25.00%	24.00%	24.00%
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%	8.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	16.00%	17.00%	16.00%	16.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,543	$ 3,508	$ 5,904	$ 6,849
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	449	734	1,121	1,493
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	653	1,421	2,033	2,782
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,441	1,353	2,750	2,574
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,177	1,450	2,458	2,839
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	664	843	1,412	1,653
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	513	607	1,046	1,186
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,218	2,735	4,615	5,307
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	517	703	1,111	1,313
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,093	1,289	2,244	2,535
Performance Materials and Technologies | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	272	265	525	534
Performance Materials and Technologies | Fluorine Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	336	478	735	925
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	1,539	1,550	2,963	3,132
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	511	557	1,013	1,095
Safety and Productivity Solutions | Productivity Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	227	267	478	538
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	595	501	1,089	1,060
Safety and Productivity Solutions | Sensing & Internet-of-Things (IoT)
Disaggregation of Revenue [Line Items]
Net Sales	$ 206	$ 225	$ 383	$ 439