GOODWILL AND OTHER INTANGIBLE ASSETS - NET (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Future Amortization Expense - 2020	$ 355,000,000
Future Amortization Expense - 2021	317,000,000
Future Amortization Expense - 2022	293,000,000
Future Amortization Expense - 2023	256,000,000
Future Amortization Expense - 2024	234,000,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,443,000,000	$ 6,456,000,000
Accumulated Amortization	(3,737,000,000)	(3,347,000,000)
Net Carrying Amount	2,706,000,000	3,109,000,000
Goodwill [Line Items]
Balance at beginning of period,	15,546,000,000
Acquisitions/Divestitures	74,000,000
Currency Translation Adjustment	(57,000,000)
Balance at end of period,	15,563,000,000	15,546,000,000
Finite And Indefinite Other Intangible Assets [Abstract]
Trademarks with indefinite lives	1,028,000,000	1,030,000,000
Gross carrying amount	7,471,000,000	7,486,000,000
Accumulated Amortization	(3,737,000,000)	(3,347,000,000)
Net carrying amount	3,734,000,000	4,139,000,000
Goodwill and Intangible Assets Paragraph Details [Abstract]
Amortization of Intangible Assets	415,000,000	395,000,000	$ 398,000,000
Aerospace [Member]
Goodwill [Line Items]
Balance at beginning of period,	2,258,000,000
Acquisitions/Divestitures	0
Currency Translation Adjustment	8,000,000
Balance at end of period,	2,266,000,000	2,258,000,000
Performance Materials And Technologies [Member]
Goodwill [Line Items]
Balance at beginning of period,	5,147,000,000
Acquisitions/Divestitures	0
Currency Translation Adjustment	(42,000,000)
Balance at end of period,	5,105,000,000	5,147,000,000
Honeywell Building Technologies [Member]
Goodwill [Line Items]
Balance at beginning of period,	3,238,000,000
Acquisitions/Divestitures	(1,000,000)
Currency Translation Adjustment	(22,000,000)
Balance at end of period,	3,215,000,000	3,238,000,000
Safety And Productivity Solutions [Member]
Goodwill [Line Items]
Balance at beginning of period,	4,903,000,000
Acquisitions/Divestitures	75,000,000
Currency Translation Adjustment	(1,000,000)
Balance at end of period,	4,977,000,000	4,903,000,000
Patents and Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,060,000,000	1,996,000,000
Accumulated Amortization	(1,481,000,000)	(1,332,000,000)
Net Carrying Amount	579,000,000	664,000,000
Finite And Indefinite Other Intangible Assets [Abstract]
Accumulated Amortization	(1,481,000,000)	(1,332,000,000)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,769,000,000	3,785,000,000
Accumulated Amortization	(1,766,000,000)	(1,510,000,000)
Net Carrying Amount	2,003,000,000	2,275,000,000
Finite And Indefinite Other Intangible Assets [Abstract]
Accumulated Amortization	(1,766,000,000)	(1,510,000,000)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	317,000,000	326,000,000
Accumulated Amortization	(228,000,000)	(206,000,000)
Net Carrying Amount	89,000,000	120,000,000
Finite And Indefinite Other Intangible Assets [Abstract]
Accumulated Amortization	(228,000,000)	(206,000,000)
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	297,000,000	349,000,000
Accumulated Amortization	(262,000,000)	(299,000,000)
Net Carrying Amount	35,000,000	50,000,000
Finite And Indefinite Other Intangible Assets [Abstract]
Accumulated Amortization	$ (262,000,000)	$ (299,000,000)