v3.26.1
PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Pension Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 16,173 $ 16,565 $ 16,594
Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 4,569 5,105 5,549
Honeywell common stock | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,400 3,283  
Honeywell common stock | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,400 3,283  
Honeywell common stock | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Honeywell common stock | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
U.S. equities | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 973 819  
U.S. equities | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   209  
U.S. equities | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 973 819  
U.S. equities | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   0  
U.S. equities | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
U.S. equities | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   209  
U.S. equities | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
U.S. equities | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   0  
Short-term investments | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 871 776  
Short-term investments | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 325 385  
Short-term investments | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 110 83  
Short-term investments | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 51 68  
Short-term investments | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 761 693  
Short-term investments | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 274 317  
Short-term investments | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Short-term investments | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Government securities | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,054 2,142  
Government securities | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 986 1,317  
Government securities | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Government securities | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Government securities | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,054 2,142  
Government securities | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 986 1,317  
Government securities | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Government securities | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Corporate bonds | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 5,434 5,104  
Corporate bonds | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 584 1,144  
Corporate bonds | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 383 230  
Corporate bonds | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Corporate bonds | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 5,051 4,874  
Corporate bonds | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 584 1,144  
Corporate bonds | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Corporate bonds | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 722 790  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 9 18  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 722 790  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 9 18  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Mortgage/Asset-backed securities | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance contracts | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 7 7  
Insurance contracts | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 92 90  
Insurance contracts | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance contracts | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance contracts | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 7 7  
Insurance contracts | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 92 90  
Insurance contracts | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance contracts | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Direct private investments | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,478 1,337 1,293
Direct private investments | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,478 1,337  
Direct private investments | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Direct private investments | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Direct private investments | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,478 1,337  
Real estate properties | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,001 972 977
Real estate properties | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,001 972  
Real estate properties | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Real estate properties | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Real estate properties | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,001 972  
Total | Pension ongoing income—non-service | Level 1 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 3,866 4,415  
Total | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 51 68  
Total | Pension ongoing income—non-service | Level 2 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 8,595 8,506  
Total | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,387 3,565  
Total | Pension ongoing income—non-service | Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,479 2,309  
Total | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 2,130 1,470  
Total | Pension ongoing income—non-service | Fair Value, Inputs, Level 1, Level 2, and Level 3 | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 14,940 15,230  
Total | Pension ongoing income—non-service | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 4,568 5,103  
Private funds | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,228 1,327  
Private funds | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1 1  
Real estate funds | Pension ongoing income—non-service | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 5 8  
Real estate funds | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   1  
Non-U.S. equities | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 442 436  
Non-U.S. equities | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Non-U.S. equities | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 442 436  
Non-U.S. equities | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance buy-in contracts | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,976 1,390 1,605
Insurance buy-in contracts | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,976 1,390  
Insurance buy-in contracts | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance buy-in contracts | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Insurance buy-in contracts | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,976 1,390  
Private funds | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 154 78 74
Private funds | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 154 112  
Private funds | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Private funds | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 34  
Private funds | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 154 78  
Real estate funds | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 0 2 $ 16
Real estate funds | Pension ongoing income—non-service | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   2  
Real estate funds | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   0  
Real estate funds | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   0  
Real estate funds | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets   $ 2