SEGMENT FINANCIAL DATA (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segments	Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Net Sales	$ 8,884	$ 10,392
Total segment profit	$ 1,809	1,995
Number of Operating Segments | segments	4
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 6,713	8,234
Services [Member]
Segment Reporting Information [Line Items]
Net Sales	2,171	2,158
Corporate
Segment Reporting Information [Line Items]
Total segment profit	(76)	(64)
Aerospace
Segment Reporting Information [Line Items]
Net Sales	3,341	3,977
Aerospace | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	3,341	3,977
Total segment profit	838	893
Aerospace | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	2,075	2,728
Aerospace | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	1,266	1,249
Performance Materials and Technologies
Segment Reporting Information [Line Items]
Net Sales	2,572	2,534
Performance Materials and Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,572	2,534
Total segment profit	564	519
Performance Materials and Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	2,070	2,063
Performance Materials and Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	502	471
Honeywell Building Technologies
Segment Reporting Information [Line Items]
Net Sales	1,389	2,433
Honeywell Building Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,389	2,433
Total segment profit	271	416
Honeywell Building Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,073	2,083
Honeywell Building Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	316	350
Safety and Productivity Solutions
Segment Reporting Information [Line Items]
Net Sales	1,582	1,448
Safety and Productivity Solutions | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,582	1,448
Total segment profit	212	231
Safety and Productivity Solutions | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,495	1,360
Safety and Productivity Solutions | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 87	$ 88