SEGMENT FINANCIAL DATA (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments	4
Net Sales	$ 8,454	$ 8,463
Total segment profit	1,775	1,848
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	6,409	6,305
Services [Member]
Segment Reporting Information [Line Items]
Net Sales	2,045	2,158
Corporate
Segment Reporting Information [Line Items]
Total segment profit	(29)	(41)
Aerospace
Segment Reporting Information [Line Items]
Net Sales	2,632	3,361
Aerospace | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,632	3,361
Total segment profit	762	937
Aerospace | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,515	2,079
Aerospace | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	1,117	1,282
Honeywell Building Technologies
Segment Reporting Information [Line Items]
Net Sales	1,358	1,281
Honeywell Building Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,358	1,281
Total segment profit	305	262
Honeywell Building Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,009	970
Honeywell Building Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	349	311
Performance Materials and Technologies
Segment Reporting Information [Line Items]
Net Sales	2,346	2,397
Performance Materials and Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,346	2,397
Total segment profit	434	512
Performance Materials and Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,869	1,914
Performance Materials and Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	477	483
Safety and Productivity Solutions
Segment Reporting Information [Line Items]
Net Sales	2,118	1,424
Safety and Productivity Solutions | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,118	1,424
Total segment profit	303	178
Safety and Productivity Solutions | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	2,016	1,342
Safety and Productivity Solutions | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 102	$ 82