PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 |
Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | $ 16,594 | $ 17,005 | $ 20,560 |
Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 5,549 | 5,304 | 8,396 |
Honeywell common stock | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 3,049 | 3,336 | |
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 | 3,049 | 3,336 | |
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 | 0 | 6 | |
U.S. equities | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 195 | 144 | |
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 | 0 | 6 | |
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 | 2 | |
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 | 195 | 142 | |
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 | 0 | |
Short-term investments | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 2,942 | 855 | |
Short-term investments | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 387 | 341 | |
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 | 283 | 855 | |
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 | 168 | 341 | |
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 | 2,659 | 0 | |
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 | 219 | 0 | |
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 | 532 | 1,492 | |
Government securities | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 1,635 | 2,045 | |
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 | 532 | 1,492 | |
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 | 1,635 | 2,045 | |
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 | 5,733 | 6,632 | |
Corporate bonds | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 1,103 | 1,031 | |
Corporate bonds | Pension ongoing income—non-service | Level 1 | 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 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 | 5,733 | 6,632 | |
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 | 1,103 | 1,031 | |
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 | 676 | 1,119 | |
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 | 10 | 31 | |
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 | 676 | 1,119 | |
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 | 10 | 31 | |
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 | 8 | |
Insurance contracts | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 108 | 115 | |
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 | 8 | |
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 | 108 | 115 | |
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 | 1,293 | 1,284 | 1,336 |
Direct private investments | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 1,293 | 1,284 | |
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 | 1,293 | 1,284 | |
Real estate properties | Level 3 | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 977 | 1,005 | 843 |
Real estate properties | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 977 | 1,005 | |
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 | 977 | 1,005 | |
Total | Pension ongoing income—non-service | Level 1 | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 3,332 | 4,197 | |
Total | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 168 | 343 | |
Total | Pension ongoing income—non-service | Level 2 | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 9,607 | 9,251 | |
Total | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 3,676 | 3,792 | |
Total | Pension ongoing income—non-service | Level 3 | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 2,270 | 2,289 | |
Total | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 1,695 | 1,116 | |
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 | 15,209 | 15,737 | |
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 | 5,539 | 5,251 | |
Private funds | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 1,265 | 1,258 | |
Private funds | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 8 | 10 | |
Real estate funds | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 8 | 10 | |
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 | 43 | |
Commingled funds | Pension ongoing income—non-service | U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 112 | 0 | |
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 | 365 | 374 | |
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 | 365 | 374 | |
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 | 1,605 | 950 | 691 |
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 | 1,605 | 950 | |
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 | 1,605 | 950 | |
Private funds | Level 3 | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 74 | 36 | 33 |
Private funds | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 115 | 90 | |
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 | 41 | 54 | |
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 | 74 | 36 | |
Real estate funds | Level 3 | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 16 | 130 | $ 163 |
Real estate funds | Pension ongoing income—non-service | Non-U.S. Plans | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Fair value of pension plan assets | 16 | 130 | |
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 | 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 | 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 | $ 16 | $ 130 | |