SEGMENT FINANCIAL DATA (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments			4
Net Sales	$ 7,797	$ 9,086	$ 23,737	$ 27,213
Total segment profit	1,553	1,928	4,786	5,707
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	5,885	6,793	17,933	20,496
Services [Member]
Segment Reporting Information [Line Items]
Net Sales	1,912	2,293	5,804	6,717
Corporate
Segment Reporting Information [Line Items]
Total segment profit	(7)	(54)	(73)	(202)
Aerospace
Segment Reporting Information [Line Items]
Net Sales	2,662	3,544	8,566	10,393
Aerospace | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,662	3,544	8,566	10,393
Total segment profit	617	908	2,082	2,653
Aerospace | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,623	2,213	5,335	6,462
Aerospace | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	1,039	1,331	3,231	3,931
Honeywell Building Technologies
Segment Reporting Information [Line Items]
Net Sales	1,305	1,415	3,763	4,254
Honeywell Building Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,305	1,415	3,763	4,254
Total segment profit	282	297	794	868
Honeywell Building Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	972	1,091	2,807	3,283
Honeywell Building Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	333	324	956	971
Performance Materials and Technologies
Segment Reporting Information [Line Items]
Net Sales	2,252	2,670	6,867	7,977
Performance Materials and Technologies | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	2,252	2,670	6,867	7,977
Total segment profit	442	582	1,373	1,790
Performance Materials and Technologies | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,803	2,129	5,510	6,437
Performance Materials and Technologies | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	449	541	1,357	1,540
Safety and Productivity Solutions
Segment Reporting Information [Line Items]
Net Sales	1,578	1,457	4,541	4,589
Safety and Productivity Solutions | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,578	1,457	4,541	4,589
Total segment profit	219	195	610	598
Safety and Productivity Solutions | Operating Segments [Member] | Products [Member]
Segment Reporting Information [Line Items]
Net Sales	1,487	1,360	4,281	4,314
Safety and Productivity Solutions | Operating Segments [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 91	$ 97	$ 260	$ 275