DOCUMENT AND ENTITY INFORMATION - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Jan. 29, 2021	Jun. 30, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-8974
Entity Registrant Name	Honeywell International Inc.
Entity Central Index Key	0000773840
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-2640650
Entity Address, Address Line One	300 South Tryon Street
Entity Address, City or Town	Charlotte,
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202
City Area Code	704
Local Phone Number	627-6200
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Icfr Auditor Attestation Flag	Yes
Entity Shell Company	false
Entity Public Float			$ 97.0
Entity Common Stock, Shares Outstanding		695,501,159
Documents Incorporated by Reference	Part III: Proxy Statement for Annual Meeting of Shareowners to be held May 21, 2021.
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $1 per share*
Trading Symbol	HON
Security Exchange Name	NYSE
Euro Notes 1.30% Due 2023 [Member]
Entity Information [Line Items]
Title of 12(b) Security	1.300% Senior Notes due 2023
Trading Symbol	HON 23A
Security Exchange Name	NYSE
0.000% Senior Notes due 2024 [Member]
Entity Information [Line Items]
Title of 12(b) Security	0.000% Senior Notes due 2024
Trading Symbol	HON 24A
Security Exchange Name	NYSE
Euro Notes 2.25% Due 2028 [Member]
Entity Information [Line Items]
Title of 12(b) Security	2.250% Senior Notes due 2028
Trading Symbol	HON 28A
Security Exchange Name	NYSE
0.750% Senior Notes due 2032 [Member]
Entity Information [Line Items]
Title of 12(b) Security	0.750% Senior Notes due 2032
Trading Symbol	HON 32
Security Exchange Name	NYSE