ACQUISITIONS AND DIVESTITURES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Divestiture/Spinoff [Abstract]
Pretax gain on sale	$ (1,000,000)	$ 0	$ (7,000,000)
Pre-separation funding	0	2,801,000,000	0
Income before taxes	7,559,000,000	7,487,000,000	6,950,000,000
Goodwill	15,563,000,000	15,546,000,000
Assets	$ 58,679,000,000	57,773,000,000	59,470,000,000
Resideo [Member]
Divestiture/Spinoff [Abstract]
Spinoff Activities Description	On October 29, 2018, the Company completed the tax-free spin-off to Honeywell shareowners of its Homes and Global Distribution business, part of Home and Building Technologies (renamed Honeywell Building Technologies following the spin-off), into a standalone publicly-traded company, Resideo Technologies, Inc. (“Resideo”).
Spinoff Transaction Share Conversion	0.17
Pre-separation funding	$ 1,200,000,000
Garrett [Member]
Divestiture/Spinoff [Abstract]
Spinoff Activities Description	On October 1, 2018, the Company completed the tax-free spin-off to Honeywell shareowners of its Transportation Systems business, part of Aerospace, into a standalone publicly-traded company, Garrett Motion Inc. (“Garrett”).
Spinoff Transaction Share Conversion	0.1
Pre-separation funding	$ 1,600,000,000
Spinoff [Member]
Divestiture/Spinoff [Abstract]
Income before taxes		$ 400,000,000	$ 500,000,000
Goodwill	2,800,000,000
Assets	5,500,000,000
Liabilities	7,200,000,000
Total Acquisitions [Member]
Business Acquisition [Line Items]
Purchase price	$ 535,000,000
Transnorm [Member]
Business Acquisition [Line Items]
Name of acquired entity	Transnorm
Description of acquired entity	a global leader in high-performance conveyor and warehouse solutions. Transnorm is part of Safety and Productivity Solutions.
Divestiture/Spinoff [Abstract]
Goodwill	$ 380,000,000