REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net Sales	$ 8,884,000,000	$ 10,392,000,000
Disaggregation of revenue, timing of recognition - percentage	100.00%	100.00%
Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,713,000,000	$ 8,234,000,000
Disaggregation of revenue, timing of recognition - percentage	76.00%	79.00%
Products [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	61.00%	69.00%
Products [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	15.00%	10.00%
Services [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,171,000,000	$ 2,158,000,000
Disaggregation of revenue, timing of recognition - percentage	24.00%	21.00%
Services [Member] | Transferred At Point In Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	9.00%	7.00%
Services [Member] | Transferred Over Time [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of revenue, timing of recognition - percentage	15.00%	14.00%
Aerospace
Disaggregation of Revenue [Line Items]
Net Sales	$ 3,341,000,000	$ 3,977,000,000
Aerospace | Commercial Aviation Original Equipment [Member]
Disaggregation of Revenue [Line Items]
Net Sales	759,000,000	695,000,000
Aerospace | Commercial Aviation Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,361,000,000	1,268,000,000
Aerospace | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,221,000,000	1,086,000,000
Aerospace | Transportation Systems [Member]
Disaggregation of Revenue [Line Items]
Net Sales	0	928,000,000
Honeywell Building Technologies
Disaggregation of Revenue [Line Items]
Net Sales	1,389,000,000	2,433,000,000
Honeywell Building Technologies | Homes Products And Software [Member]
Disaggregation of Revenue [Line Items]
Net Sales	0	519,000,000
Honeywell Building Technologies | Distribution (ADI)
Disaggregation of Revenue [Line Items]
Net Sales	0	638,000,000
Honeywell Building Technologies | Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	810,000,000	714,000,000
Honeywell Building Technologies | Building Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	579,000,000	562,000,000
Performance Materials and Technologies
Disaggregation of Revenue [Line Items]
Net Sales	2,572,000,000	2,534,000,000
Performance Materials and Technologies | UOP [Member]
Disaggregation of Revenue [Line Items]
Net Sales	610,000,000	612,000,000
Performance Materials and Technologies | Process Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,246,000,000	1,214,000,000
Performance Materials and Technologies | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	269,000,000	277,000,000
Performance Materials and Technologies | Fluorine Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	447,000,000	431,000,000
Safety and Productivity Solutions
Disaggregation of Revenue [Line Items]
Net Sales	1,582,000,000	1,448,000,000
Safety and Productivity Solutions | Safety and Retail [Member]
Disaggregation of Revenue [Line Items]
Net Sales	538,000,000	551,000,000
Safety and Productivity Solutions | Productivity Products [Member]
Disaggregation of Revenue [Line Items]
Net Sales	271,000,000	329,000,000
Safety and Productivity Solutions | Warehouse and Workflow Solutions [Member]
Disaggregation of Revenue [Line Items]
Net Sales	558,000,000	367,000,000
Safety and Productivity Solutions | Sensing & Internet-of-Things (IoT)
Disaggregation of Revenue [Line Items]
Net Sales	$ 215,000,000	$ 201,000,000