Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The accounting policies of the Company are set forth in Note 1 Summary of Significant Accounting Policies of Notes to Consolidated Financial Statements in the Company’s 2025 Annual Report on Form 10-K. The Company includes herein certain updates to those policies. Reclassifications Certain prior year amounts are reclassified to conform to the current year presentation. In the third quarter on June 29, 2026, the Company completed the previously announced separation of its Aerospace Technologies business into an independent, publicly traded company named Honeywell Aerospace Inc. (Honeywell Aerospace). On October 30, 2025, the Company completed the spin-off of its Advanced Materials business into an independent, publicly traded company named Solstice Advanced Materials Inc. (Solstice). Results of operations, financial position, and cash flows for the Aerospace Technologies and Advanced Materials businesses are reported as discontinued operations for all periods presented. Unless otherwise noted, information in these notes to consolidated financial statements relates to continuing operations. Effective beginning in the first quarter of 2026, the Company realigned certain of its business units as reflected in Note 18 Segment Financial Data, which impacted the composition of its reportable segments. The Company recast historical periods to reflect this change in segment presentation, including the reallocation of goodwill on a relative fair value basis as discussed in Note 8 Goodwill and Other Intangible Assets—Net. Additionally, in conjunction with the Aerospace Spin-Off, the Company transferred assets of $26 million from the former Aerospace Technologies reportable business segment to the Industrial Automation reportable business segment. Prior period amounts have been recast. Supply Chain Financing Amounts outstanding related to supply chain financing programs are included in Accounts payable in the Consolidated Balance Sheet. Accounts payable included approximately $433 million and $620 million as of September 30, 2026 and December 31, 2025, respectively, related to these programs. The impact of these programs is not material to the Company’s overall liquidity. Equity Method Investments The Company accounts for investments under the equity method of accounting when it has the ability to exercise significant influence, but not control, over an investee. Significant influence is generally considered to exist when the Company holds an ownership interest in the voting stock of an investee of between 20% and 50%, although other factors may also be considered. Equity method investments are recorded within Equity Method Investments in the Consolidated Balance Sheet. Differences between the carrying amount of the investment and the Company’s proportionate share of the investee’s net assets are attributed to identifiable assets and liabilities, with any residual recorded as goodwill. Basis differences are amortized over their estimated useful lives. Equity method investments are assessed for other-than-temporary impairment when events occur, or circumstances change, that indicate it is more likely than not the fair value of the asset is below its carrying value. If there is an other-than-temporary decline in the value of an equity method investment, it is recognized as an impairment loss in the current period. The Company recognizes its proportionate share of the investee’s earnings or losses in the Consolidated Statement of Operations. Equity income and loss are classified based on the nature of the investment. Results from strategically aligned investments are recorded in Other (income) expense, while results from non-strategic investments are recorded in Equity loss. As of September 30, 2026, the carrying amount of the Company’s equity method investment in Quantinuum Inc. (Quantinuum) was $7,113 million. During the three and nine months ended September 30, 2026, the Company recognized equity losses of $147 million and $412 million, respectively, related to this investment. Environmental The Company accrues costs for environmental matters when it is probable that a liability has been incurred for a contaminated site and the amount can be reasonably estimated. These estimates are informed by a range of data inputs and analytical tools, including historical remediation data, ongoing refinements to remediation strategies and centralized data aggregation tools that allow the Company to compare site characteristics and expected remediation activities across similar sites in its portfolio. Recorded liabilities are evaluated regularly and adjusted as remediation efforts progress or as additional technical, regulatory or legal information becomes available; such adjustments are accounted for as changes in estimates in the period identified. Recent Accounting Pronouncements The Company considers the applicability and impact of all Accounting Standards Updates (ASUs) issued by the Financial Accounting Standards Board (FASB). ASUs not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s Consolidated Financial Statements. In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which modernizes the accounting for internal-use software costs by removing all references to prescriptive and sequential software development stages. The new standard requires entities to consider whether significant development uncertainty has been resolved before starting to capitalize software costs and aligns disclosure requirements with Accounting Standards Codification (ASC) 360, Property, Plant, and Equipment. This ASU is effective for annual and interim reporting periods beginning after December 15, 2027, and can be applied prospectively, retrospectively, or using a modified transition method, with early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s Consolidated Financial Statements. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires companies to disclose additional information about the types of expenses in commonly presented expense captions. The new standard requires tabular disclosure of specified natural expenses in certain expense captions, a qualitative description of amounts that are not separately disaggregated, and disclosure of the Company’s definition and total amount of selling expenses. The ASU should be applied prospectively for annual reporting periods beginning after December 15, 2026, with retrospective application and early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s Consolidated Financial Statements.

The accounting policies of the Company are set forth in Note 1 Summary of Significant Accounting Policies of Notes to Consolidated Financial Statements in the Company’s 2025 Annual Report on Form 10-K. The Company includes herein certain updates to those policies.

In the third quarter on June 29, 2026, the Company completed the previously announced separation of its Aerospace Technologies business into an independent, publicly traded company named Honeywell Aerospace Inc. (Honeywell Aerospace). On October 30, 2025, the Company completed the spin-off of its Advanced Materials business into an independent, publicly traded company named Solstice Advanced Materials Inc. (Solstice). Results of operations, financial position, and cash flows for the Aerospace Technologies and Advanced Materials businesses are reported as discontinued operations for all periods presented. Unless otherwise noted, information in these notes to consolidated financial statements relates to continuing operations.

Effective beginning in the first quarter of 2026, the Company realigned certain of its business units as reflected in Note 18 Segment Financial Data, which impacted the composition of its reportable segments. The Company recast historical periods to reflect this change in segment presentation, including the reallocation of goodwill on a relative fair value basis as discussed in Note 8 Goodwill and Other Intangible Assets—Net. Additionally, in conjunction with the Aerospace Spin-Off, the Company transferred assets of $26 million from the former Aerospace Technologies reportable business segment to the Industrial Automation reportable business segment. Prior period amounts have been recast.

Amounts outstanding related to supply chain financing programs are included in Accounts payable in the Consolidated Balance Sheet. Accounts payable included approximately $433 million and $620 million as of September 30, 2026 and December 31, 2025, respectively, related to these programs. The impact of these programs is not material to the Company’s overall liquidity.

The Company accounts for investments under the equity method of accounting when it has the ability to exercise significant influence, but not control, over an investee. Significant influence is generally considered to exist when the Company holds an ownership interest in the voting stock of an investee of between 20% and 50%, although other factors may also be considered.

Equity method investments are recorded within Equity Method Investments in the Consolidated Balance Sheet. Differences between the carrying amount of the investment and the Company’s proportionate share of the investee’s net assets are attributed to identifiable assets and liabilities, with any residual recorded as goodwill. Basis differences are amortized over their estimated useful lives. Equity method investments are assessed for other-than-temporary impairment when events occur, or circumstances change, that indicate it is more likely than not the fair value of the asset is below its carrying value. If there is an other-than-temporary decline in the value of an equity method investment, it is recognized as an impairment loss in the current period.

The Company recognizes its proportionate share of the investee’s earnings or losses in the Consolidated Statement of Operations. Equity income and loss are classified based on the nature of the investment. Results from strategically aligned investments are recorded in Other (income) expense, while results from non-strategic investments are recorded in Equity loss.

As of September 30, 2026, the carrying amount of the Company’s equity method investment in Quantinuum Inc. (Quantinuum) was $7,113 million. During the three and nine months ended September 30, 2026, the Company recognized equity losses of $147 million and $412 million, respectively, related to this investment.

The Company accrues costs for environmental matters when it is probable that a liability has been incurred for a contaminated site and the amount can be reasonably estimated. These estimates are informed by a range of data inputs and analytical tools, including historical remediation data, ongoing refinements to remediation strategies and centralized data aggregation tools that allow the Company to compare site characteristics and expected remediation activities across similar sites in its portfolio. Recorded liabilities are evaluated regularly and adjusted as remediation efforts progress or as additional technical, regulatory or legal information becomes available; such adjustments are accounted for as changes in estimates in the period identified.

The Company considers the applicability and impact of all Accounting Standards Updates (ASUs) issued by the Financial Accounting Standards Board (FASB). ASUs not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s Consolidated Financial Statements.

In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which modernizes the accounting for internal-use software costs by removing all references to prescriptive and sequential software development stages. The new standard requires entities to consider whether significant development uncertainty has been resolved before starting to capitalize software costs and aligns disclosure requirements with Accounting Standards Codification (ASC) 360, Property, Plant, and Equipment. This ASU is effective for annual and interim reporting periods beginning after December 15, 2027, and can be applied prospectively, retrospectively, or using a modified transition method, with early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s Consolidated Financial Statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires companies to disclose additional information about the types of expenses in commonly presented expense captions. The new standard requires tabular disclosure of specified natural expenses in certain expense captions, a qualitative description of amounts that are not separately disaggregated, and disclosure of the Company’s definition and total amount of selling expenses. The ASU should be applied prospectively for annual reporting periods beginning after December 15, 2026, with retrospective application and early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s Consolidated Financial Statements.