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PENSION AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | $ 16,565 | $ 16,594 | $ 17,005
Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 5,105 | 5,549 | 5,304
Honeywell common stock | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 3,283 | 3,049 |
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 | 3,283 | 3,049 |
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 | 819 | 0 |
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 | 195 |
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 | 819 | 0 |
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 |
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 | 195 |
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 | 776 | 2,942 |
Short-term investments | Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 385 | 387 |
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 | 83 | 283 |
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 | 68 | 168 |
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 | 693 | 2,659 |
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 | 317 | 219 |
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 | 2,142 | 532 |
Government securities | Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1,317 | 1,635 |
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 | 2,142 | 532 |
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 | 1,317 | 1,635 |
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 | 5,104 | 5,733 |
Corporate bonds | Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1,144 | 1,103 |
Corporate bonds | Pension ongoing income—non-service | Level 1 | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 230 | 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 | 4,874 | 5,733 |
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 | 1,144 | 1,103 |
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 | 790 | 676 |
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 | 18 | 10 |
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 | 790 | 676 |
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 | 18 | 10 |
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 | 90 | 108 |
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 | 90 | 108 |
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 | 1,337 | 1,293 | 1,284
Direct private investments | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1,337 | 1,293 |
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 | 1,337 | 1,293 |
Real estate properties | Level 3 | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 972 | 977 | 1,005
Real estate properties | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 972 | 977 |
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 | 972 | 977 |
Total | Pension ongoing income—non-service | Level 1 | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 4,415 | 3,332 |
Total | Pension ongoing income—non-service | Level 1 | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 68 | 168 |
Total | Pension ongoing income—non-service | Level 2 | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 8,506 | 9,607 |
Total | Pension ongoing income—non-service | Level 2 | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 3,565 | 3,676 |
Total | Pension ongoing income—non-service | Level 3 | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 2,309 | 2,270 |
Total | Pension ongoing income—non-service | Level 3 | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1,470 | 1,695 |
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 | 15,230 | 15,209 |
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 | 5,103 | 5,539 |
Private funds | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1,327 | 1,265 |
Private funds | Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 1 | 8 |
Real estate funds | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 8 | 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 | 2 |
Commingled funds | Pension ongoing income—non-service | U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets |  | 112 |
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 | 436 | 365 |
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 | 436 | 365 |
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 | 1,390 | 1,605 | 950
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 | 1,390 | 1,605 |
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 | 1,390 | 1,605 |
Private funds | Level 3 | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 78 | 74 | 36
Private funds | Pension ongoing income—non-service | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 112 | 115 |
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 | 34 | 41 |
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 | 78 | 74 |
Real estate funds | Level 3 | Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of pension plan assets | 2 | 16 | $ 130
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 | 16 |
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 | $ 2 | $ 16 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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