REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 8,463	$ 8,884
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,305	$ 6,713
Disaggregation of revenue, timing of recognition - percentage	75.00%	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%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	14.00%	15.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,158	$ 2,171
Disaggregation of revenue, timing of recognition - percentage	25.00%	24.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	9.00%	9.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	16.00%	15.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 3,361	$ 3,341
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	672	759
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,380	1,361
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,309	1,221
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,281	1,389
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	748	810
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	533	579
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,397	2,572
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	594	610
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,151	1,246
Performance Materials and Technologies | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	253	269
Performance Materials and Technologies | Fluorine Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	399	447
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	1,424	1,582
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	502	538
Safety and Productivity Solutions | Productivity Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	251	271
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	494	558
Safety and Productivity Solutions | Sensing & Internet-of-Things (IoT)
Disaggregation of Revenue [Line Items]
Net Sales	$ 177	$ 215