ACQUISITIONS AND DIVESTITURES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Purchase price	$ 535,000,000		$ 2,538,000,000
Divestiture/Spinoff [Abstract]
Proceeds From Divestiture Of Businesses	0	$ 0	296,000,000
Pretax gain on sale	0	(7,000,000)	178,000,000
Pre-separation funding	2,801,000,000	0	269,000,000
Pre-spin borrowing	0	0	38,000,000
Income before taxes	7,487,000,000	6,950,000,000	6,452,000,000
Goodwill	15,546,000,000	18,277,000,000
Assets	$ 57,773,000,000	59,470,000,000	54,566,000,000
AdvanSix Inc. (Formerly Resins and Chemicals Business) [Member]
Divestiture/Spinoff [Abstract]
Spinoff Activities Description	On October 1, 2016, the Company completed the tax-free spin-off to Honeywell shareowners of its Resins and Chemicals business, part of Performance Materials and Technologies, into a standalone, publicly-traded company (named AdvanSix Inc. (“AdvanSix”)). The assets and liabilities associated with AdvanSix have been removed from the Company’s Consolidated Balance Sheet as of the effective date of the spin-off. The results of operations for AdvanSix are included in the Consolidated Statement of Operations through the effective date of the spin-off. Honeywell shareowners of record as of the close of business on September 16, 2016 received one share of AdvanSix common stock for every 25 shares of Honeywell common stock. Immediately prior to the effective date of the spin-off, AdvanSix incurred debt to make a cash distribution of $269 million to the Company. At the same time, AdvanSix also incurred $38 million of borrowings in order to fund its post spin-off working capital. In 2016 in connection with the spin-off, the Company entered into certain agreements with AdvanSix to effect our legal and structural separation including a transition services agreement with AdvanSix to provide certain administrative and other services for a limited time. As of the end of 2018, those agreements have ended.
Spinoff Activities Completion Date	Oct. 01, 2016
Spinoff Transaction Share Conversion	0.04
Pre-separation funding	$ 269,000,000
Pre-spin borrowing	$ 38,000,000
Resideo Technologies, Inc. ("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 Activities Completion Date	Oct. 29, 2018
Spinoff Transaction Share Conversion	0.17
Pre-separation funding	$ 1,200,000,000
Garrett Motion, Inc. ("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 Activities Completion Date	Oct. 01, 2018
Spinoff Transaction Share Conversion	0.1
Pre-separation funding	$ 1,600,000,000
Spinoff
Divestiture/Spinoff [Abstract]
Income before taxes	400,000,000	$ 500,000,000	$ 600,000,000
Goodwill	2,800,000,000
Assets	5,500,000,000
Liabilities	7,200,000,000
Honeywell Technology Solutions Inc [Member] | Disposal Group Disposed Of By Sale Not Discontinued Operations [Member]
Divestiture/Spinoff [Abstract]
Proceeds From Divestiture Of Businesses	300,000,000
Pretax gain on sale	$ 176,000,000
Date of disposition	Sep. 16, 2016
COM DEV International [Member]
Business Acquisition [Line Items]
Name of acquired entity	COM DEV International
Description of acquired entity	a leading satellite and space components provider
Effective date of acquisition	Feb. 29, 2016
Purchase price	$ 347,000,000
UOP Russell LLC [Member]
Business Acquisition [Line Items]
Name of acquired entity	UOP Russell LLC
Description of acquired entity	develops technology and manufactures modular equipment to process natural gas
Effective date of acquisition	Jan. 31, 2016
Remaining noncontrolling interest acquired (as a percentage)	30.00%
Purchase price	$ 240,000,000
Xtralis International Holdings Limited
Business Acquisition [Line Items]
Name of acquired entity	Xtralis International Holdings Limited (“Xtralis”),
Description of acquired entity	a leading global provider of aspiration smoke detection and perimeter security technologies
Effective date of acquisition	Apr. 01, 2016
Purchase price	$ 515,000,000
Intelligrated [Member]
Business Acquisition [Line Items]
Name of acquired entity	Intelligrated
Description of acquired entity	a leading provider of supply chain and warehouse automation technologies,
Effective date of acquisition	Aug. 29, 2016
Purchase price	$ 1,488,000,000
Divestiture/Spinoff [Abstract]
Goodwill	1,121,000,000
Intangible assets	$ 507,000,000
Intelligrated [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets weighted average useful life	1 year
Intelligrated [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets weighted average useful life	15 years
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.
Effective date of acquisition	Nov. 30, 2018
Divestiture/Spinoff [Abstract]
Goodwill	$ 338,000,000