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