Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Interest Costs

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Pension equity futures derivative notional amount

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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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.

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Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

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Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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PENSION AND OTHER POSTRETIREMENT BENEFITS - Narrative (Details) - USD ($)		12 Months Ended
	Oct. 30, 2025	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Reacquired stock or repurchases of common stock			$ 3,819,000,000	$ 1,672,000,000	$ 3,715,000,000
Solstice \| Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Defined Benefit Plan Disclosure [Line Items]
Disposal group, including discontinued operation, pension benefit obligations	$ 177,000,000
Disposal group, including discontinued operation, pension plan assets	$ 150,000,000
Honeywell U.S. Pension Plan Master Trust
Defined Benefit Plan Disclosure [Line Items]
Reacquired stock or repurchases of common stock			500,000,000	0
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Pension notional amount			1,958,000,000	1,991,000,000
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Pension notional amount			227,000,000	$ 195,000,000
Cash pension contributions			7,000,000
Contributions to pension plans			$ 6,000,000
Minimum \| Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			45.00%
Minimum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			25.00%
Minimum \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			5.00%
Minimum \| Other than Securities Investment
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			10.00%
Maximum \| Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			65.00%
Maximum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			40.00%
Maximum \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			10.00%
Maximum \| Other than Securities Investment
Defined Benefit Plan Disclosure [Line Items]
Target allocations percentage			20.00%
Pension ongoing income—non-service \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on plan assets			7.25%	7.00%	6.75%
Accumulated benefit obligation			$ 11,800,000,000	$ 11,800,000,000
Pension ongoing income—non-service \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on plan assets			6.06%	5.48%	5.15%
Accumulated benefit obligation			$ 3,600,000,000	$ 4,100,000,000
Forecast \| Pension ongoing income—non-service \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate, service costs		5.24%
Discount rate, interest costs		4.70%
Expected rate of return on plan assets		7.25%