REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net Sales	$ 9,243,000,000	$ 10,919,000,000	$ 18,127,000,000	$ 21,311,000,000
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,990,000,000	$ 8,703,000,000	$ 13,703,000,000	$ 16,937,000,000
Disaggregation of revenue, timing of recognition - percentage	75.00%	80.00%	76.00%	80.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	61.00%	69.00%	61.00%	69.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	14.00%	11.00%	15.00%	11.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,253,000,000	$ 2,216,000,000	$ 4,424,000,000	$ 4,374,000,000
Disaggregation of revenue, timing of recognition - percentage	25.00%	20.00%	24.00%	20.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	8.00%	6.00%	8.00%	6.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	17.00%	14.00%	16.00%	14.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 3,508,000,000	$ 4,058,000,000	$ 6,849,000,000	$ 8,035,000,000
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	734,000,000	712,000,000	1,493,000,000	1,407,000,000
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,421,000,000	1,326,000,000	2,782,000,000	2,594,000,000
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,353,000,000	1,128,000,000	2,574,000,000	2,214,000,000
Aerospace | Transportation Systems [Member]
Disaggregation of Revenue [Line Items]
Net Sales	0	892,000,000	0	1,820,000,000
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,450,000,000	2,546,000,000	2,839,000,000	4,979,000,000
Honeywell Building Technologies | Homes Products And Software [Member]
Disaggregation of Revenue [Line Items]
Net Sales	0	514,000,000	0	1,033,000,000
Honeywell Building Technologies | Distribution (ADI)
Disaggregation of Revenue [Line Items]
Net Sales	0	676,000,000	0	1,314,000,000
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	843,000,000	754,000,000	1,653,000,000	1,468,000,000
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	607,000,000	602,000,000	1,186,000,000	1,164,000,000
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,735,000,000	2,698,000,000	5,307,000,000	5,232,000,000
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	703,000,000	678,000,000	1,313,000,000	1,290,000,000
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,289,000,000	1,273,000,000	2,535,000,000	2,487,000,000
Performance Materials and Technologies | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	265,000,000	291,000,000	534,000,000	568,000,000
Performance Materials and Technologies | Fluorine Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	478,000,000	456,000,000	925,000,000	887,000,000
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	1,550,000,000	1,617,000,000	3,132,000,000	3,065,000,000
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	557,000,000	565,000,000	1,095,000,000	1,116,000,000
Safety and Productivity Solutions | Productivity Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	267,000,000	359,000,000	538,000,000	688,000,000
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	501,000,000	469,000,000	1,060,000,000	836,000,000
Safety and Productivity Solutions | Sensing & Internet-of-Things (IoT)
Disaggregation of Revenue [Line Items]
Net Sales	$ 225,000,000	$ 224,000,000	$ 439,000,000	$ 425,000,000