v3.26.1
Interest in Honeywell Savings and Ownership Plan Master Trust - Master Trust and the Plan’s interest in the Master Trust (Details) - Honeywell 401(k) Plan [Member] - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value $ 16,707 $ 16,223
Net assets of the Master Trust 16,707 16,223
Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 16,547 16,077
Net assets of the Master Trust 16,547 16,077
Collective Trust Funds [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 10,416 8,922
Collective Trust Funds [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 10,298 8,817
Exchange Traded Funds [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 18 305
Exchange Traded Funds [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 18 303
Honeywell Common Stock [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 3,315 3,804
Honeywell Common Stock [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 3,292 3,782
Common Stocks (Separately Managed Portfolios) [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 1,234 1,424
Common Stocks (Separately Managed Portfolios) [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 1,227 1,416
Asset Backed Securities [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 279 293
Asset Backed Securities [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 277 291
Bank Deposits [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 311 425
Bank Deposits [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 309 423
Commercial Mortgage Backed Securities [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 6 7
Commercial Mortgage Backed Securities [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 6 7
Corporate Bonds [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 571 602
Corporate Bonds [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 567 599
U.S. Government and Federal Agencies [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 174 58
U.S. Government and Federal Agencies [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 173 58
Municipal Bonds [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 7  
Municipal Bonds [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 7  
Non-US Government [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 47 127
Non-US Government [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 47 126
Commercial Paper [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 292 256
Commercial Paper [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 290 $ 255
Cash and Cash Equivalents [Member] | Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value 37  
Cash and Cash Equivalents [Member] | Plan Interest in Master Trust [Member]    
Interest in Honeywell Savings and Ownership Plan Master Trust [Abstract]    
Total investments at fair value $ 36