SEGMENT FINANCIAL DATA (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments			4
Net Sales	$ 7,477	$ 9,243	$ 15,940	$ 18,127
Total segment profit	1,385	1,970	3,233	3,779
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	5,743	6,990	12,048	13,703
Services [Member]
Segment Reporting Information [Line Items]
Net Sales	1,734	2,253	3,892	4,424
Corporate
Segment Reporting Information [Line Items]
Total segment profit	(25)	(72)	(66)	(148)
Aerospace
Segment Reporting Information [Line Items]
Net Sales	2,543	3,508	5,904	6,849
Aerospace | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,543	3,508	5,904	6,849
Total segment profit	528	907	1,465	1,745
Aerospace | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,633	2,174	3,712	4,249
Aerospace | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	910	1,334	2,192	2,600
Performance Materials and Technologies
Segment Reporting Information [Line Items]
Net Sales	2,218	2,735	4,615	5,307
Performance Materials and Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,218	2,735	4,615	5,307
Total segment profit	419	644	931	1,208
Performance Materials and Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,793	2,238	3,707	4,308
Performance Materials and Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	425	497	908	999
Honeywell Building Technologies
Segment Reporting Information [Line Items]
Net Sales	1,177	1,450	2,458	2,839
Honeywell Building Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,177	1,450	2,458	2,839
Total segment profit	250	300	512	571
Honeywell Building Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	865	1,119	1,835	2,192
Honeywell Building Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	312	331	623	647
Safety and Productivity Solutions
Segment Reporting Information [Line Items]
Net Sales	1,539	1,550	2,963	3,132
Safety and Productivity Solutions | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,539	1,550	2,963	3,132
Total segment profit	213	191	391	403
Safety and Productivity Solutions | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,452	1,459	2,794	2,954
Safety and Productivity Solutions | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 87	$ 91	$ 169	$ 178