REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net Sales	$ 8,454	$ 8,463
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,409	$ 6,305
Disaggregation of revenue, timing of recognition - percentage	76.00%	75.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	58.00%	61.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	18.00%	14.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,045	$ 2,158
Disaggregation of revenue, timing of recognition - percentage	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%	9.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	17.00%	16.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,632	$ 3,361
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	431	675
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	910	1,385
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,291	1,301
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,358	1,281
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	798	741
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	560	540
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,346	2,397
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	527	594
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,096	1,151
Performance Materials and Technologies | Advanced Materials [Member]
Disaggregation of Revenue [Line Items]
Net Sales	723	652
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	2,118	1,424
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	743	502
Safety and Productivity Solutions | Productivity Solutions and Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	343	287
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	844	458
Safety and Productivity Solutions | Advanced Sensing Technologies (formerly Sensing & Internet-of-Things)
Disaggregation of Revenue [Line Items]
Net Sales	$ 188	$ 177