v3.25.4
COVER PAGE - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2025
Jan. 23, 2026
Jun. 30, 2025
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-8974    
Entity Registrant Name Honeywell International Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 22-2640650    
Entity Address, Address Line One 855 South Mint 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 true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 145.3
Entity Common Stock, Shares Outstanding   635,675,701  
Documents Incorporated by Reference Part III: Proxy Statement for Annual Meeting of Shareowners to be held May 22, 2026    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment flag false    
Entity central index key 0000773840    
Common stock, par value      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, par value $1 per share    
Trading Symbol HON    
Security Exchange Name NASDAQ    
3.50% euro notes due 2027      
Entity Information [Line Items]      
Title of 12(b) Security 3.500% Senior Notes due 2027    
Trading Symbol HON 27    
Security Exchange Name NASDAQ    
2.25% euro notes due 2028      
Entity Information [Line Items]      
Title of 12(b) Security 2.250% Senior Notes due 2028    
Trading Symbol HON 28A    
Security Exchange Name NASDAQ    
3.375% euro notes due 2030      
Entity Information [Line Items]      
Title of 12(b) Security 3.375% Senior Notes due 2030    
Trading Symbol HON 30    
Security Exchange Name NASDAQ    
0.75% euro notes due 2032      
Entity Information [Line Items]      
Title of 12(b) Security 0.750% Senior Notes due 2032    
Trading Symbol HON 32    
Security Exchange Name NASDAQ    
3.75% euro notes due 2032      
Entity Information [Line Items]      
Title of 12(b) Security 3.750% Senior Notes due 2032    
Trading Symbol HON 32A    
Security Exchange Name NASDAQ    
4.125% euro notes due 2034      
Entity Information [Line Items]      
Title of 12(b) Security 4.125% Senior Notes due 2034    
Trading Symbol HON 34    
Security Exchange Name NASDAQ    
3.75% euro notes due 2036      
Entity Information [Line Items]      
Title of 12(b) Security 3.750% Senior Notes due 2036    
Trading Symbol HON 36    
Security Exchange Name NASDAQ