Organization, Consolidation and Presentation of Financial Statements	12 Months Ended
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization, Operations and Basis of Presentation	Note 1. Organization, Operations and Basis of Presentation Business Description Resideo Technologies, Inc. (“Resideo” or “the Company”), is a leading manufacturer and distributor of technology-driven products that provide critical comfort, residential thermal and security solutions to homes globally. The Company is also the leading wholesale distributor of low-voltage security products including intrusion, access control and video products and participates significantly in the broader related markets of smart home, fire, power, audio, ProAV, networking, communications, wire and cable, enterprise connectivity, and structured wiring products. The Company has a global footprint serving commercial and residential end markets. Separation from Honeywell The Company was incorporated in Delaware on April 24, 2018. On October 29, 2018, the Company separated from Honeywell International Inc. (“Honeywell”) becoming an independent publicly traded company as a result of a pro rata distribution of the Company’s common stock to shareholders of Honeywell (the “Spin-Off”). The Company began trading “regular way” under the ticker symbol “REZI” on the New York Stock Exchange on October 29, 2018. In connection with the separation, Resideo and Honeywell entered into a Reimbursement Agreement (as defined in Note 2. Summary of Significant Accounting Policies), a Separation and Distribution Agreement, an Employee Matters Agreement, a Tax Matters Agreement, a Transition Services Agreement, a Trademark License Agreement and a Patent Cross-License Agreement. The agreements govern the relationship between Resideo and Honeywell following the separation and provide for the allocation of various assets, liabilities, rights, and obligations. These agreements also include arrangements for transition services provided by Honeywell to Resideo and by Resideo to Honeywell. Basis of Presentation Prior to the Spin-Off, the Company’s historical financial statements were prepared on a stand-alone combined basis and were derived from the consolidated financial statements and accounting records of Honeywell. Accordingly, for periods prior to October 29, 2018, these financial statements are presented on a combined basis and for the periods subsequent to October 29, 2018 are presented on a consolidated basis (collectively, the historical financial statements for all periods presented are referred to as “Consolidated and Combined Financial Statements”). The Consolidated and Combined Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). All intracompany transactions have been eliminated for all periods presented. As described in Note 5. Related Party Transactions with Honeywell, all significant transactions between the Company and Honeywell occurring prior to the Spin-Off have been included in these Consolidated and Combined Financial Statements. While the Company was owned by Honeywell, a centralized approach to cash management and financing was used. Prior to the consummation of the Spin-Off, the majority of the Company’s cash was transferred to Honeywell daily and Honeywell funded the Company’s operating and investing activities as needed. The combined financial statements prior to the Spin-Off include certain assets and liabilities that have historically been held at Honeywell corporate level but were specifically identifiable or otherwise attributable to the Company. The cash and cash equivalents held by Honeywell at the corporate level were not specifically identifiable to the Company and therefore were not attributed. Honeywell third-party debt and the related interest expense were not allocated as Honeywell’s borrowings were not directly attributable to the company. In periods subsequent to the Spin-Off, the Company made adjustments to balances transferred at the Spin-Off, including adjustments to the classification of assets or liabilities transferred. Any such adjustments are recorded directly to equity in Adjustments due to the Spin-Off and are considered immaterial. Prior to the Spin-Off, Honeywell provided certain services, such as legal, accounting, information technology, human resources and other infrastructure support, on behalf of the Company. The cost of these services has been allocated to the Company on the basis of the proportion of net revenue. The Company and Honeywell consider these allocations to be a reasonable reflection of the benefits received by the Company. However, the financial information presented in these Consolidated and Combined Financial Statements may not reflect the consolidated and combined financial position, operating results and cash flows of the Company had the Company been a separate stand-alone entity during the periods presented. Actual costs that would have been incurred if the Company had been a stand-alone company would depend on multiple factors, including organizational structure and strategic decisions made in various areas, including information technology and infrastructure. Both Resideo and Honeywell consider the basis on which the expenses have been allocated to be a reasonable reflection of the utilization of services provided to or the benefits received by the Company during the periods presented. After the Spin-Off, a number of the above services have continued under a Transition Service Agreement with Honeywell, which the Company expenses as incurred based on the contractual pricing terms. The Company reports financial information on a fiscal quarter basis using a “modified” 4-4-5 calendar (modified in that the fiscal year always begins on January 1 and ends on December 31) that requires its businesses to close their first, second and third quarter books on a Saturday in order to minimize the potentially disruptive effects of quarterly closing on business processes. The effects of this practice are generally not significant to reported results for any quarter and only exist within a reporting year. Reclassification On January 1, 2020, the Company changed its classification of research and development expenses in the Consolidated and Combined Statements of Operations from Cost of goods sold to Selling, general and administrative expenses, such that research and development expenses are excluded from the calculation of Gross profit. This change had no impact on Net income and earnings per share or the Consolidated Balance Sheet, Consolidated and Combined Statements of Cash Flow or Equity. The Company determined the impact on previously issued consolidated and combined annual and interim financial statements was not material. The impact for the years ended December 31, 2019 and 2018 was a decrease in Cost of goods sold, an increase in Gross profit and in Selling, general and administrative expenses of $87 million and $59 million, respectively. The impact of the reclassification for the year ended December 31, 2019 is also reflected in Note 7. Restructuring Charges and Note 23. Unaudited Quarterly Financial Information. In addition, the prior year segment information was recast to present Corporate separately. See Note 21. Segment Financial Data for additional information. Certain reclassifications have been made to the prior period financial statements to conform to the classification adopted in the current period. Issuance of Common Stock through Public Offering On November 17, 2020, the Company entered into an underwriting agreement (the “Underwriting Agreement”) which provided for the offer and sale by the Company of 17,000,000 shares of common stock of the Company at the public offering price of $15.00 per share (the “Offering”). The Offering closed on November 20, 2020. On December 14, 2020, the Company completed the closing of the exercise of the underwriters’ option to purchase an additional 2,550,000 shares of common stock of the Offering price of $15.00 per share as allowed in the Underwriting Agreement. The Company received net proceeds of approximately $279 million, after deducting underwriting discounts of $13 million and offering expenses payable by the Company of $1 million.

Organization, Consolidation and Presentation of Financial Statements

12 Months Ended

Dec. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Organization, Operations and Basis of Presentation

Note 1. Organization, Operations and Basis of Presentation

Business Description

Resideo Technologies, Inc. (“Resideo” or “the Company”), is a leading manufacturer and distributor of technology-driven products that provide critical comfort, residential thermal and security solutions to homes globally. The Company is also the leading wholesale distributor of low-voltage security products including intrusion, access control and video products and participates significantly in the broader related markets of smart home, fire, power, audio, ProAV, networking, communications, wire and cable, enterprise connectivity, and structured wiring products. The Company has a global footprint serving commercial and residential end markets.

Separation from Honeywell

The Company was incorporated in Delaware on April 24, 2018. On October 29, 2018, the Company separated from Honeywell International Inc. (“Honeywell”) becoming an independent publicly traded company as a result of a pro rata distribution of the Company’s common stock to shareholders of Honeywell (the “Spin-Off”). The Company began trading “regular way” under the ticker symbol “REZI” on the New York Stock Exchange on October 29, 2018.

In connection with the separation, Resideo and Honeywell entered into a Reimbursement Agreement (as defined in Note 2. Summary of Significant Accounting Policies), a Separation and Distribution Agreement, an Employee Matters Agreement, a Tax Matters Agreement, a Transition Services Agreement, a Trademark License Agreement and a Patent Cross-License Agreement. The agreements govern the relationship between Resideo and Honeywell following the separation and provide for the allocation of various assets, liabilities, rights, and obligations. These agreements also include arrangements for transition services provided by Honeywell to Resideo and by Resideo to Honeywell.

Basis of Presentation

Prior to the Spin-Off, the Company’s historical financial statements were prepared on a stand-alone combined basis and were derived from the consolidated financial statements and accounting records of Honeywell. Accordingly, for periods prior to October 29, 2018, these financial statements are presented on a combined basis and for the periods subsequent to October 29, 2018 are presented on a consolidated basis (collectively, the historical financial statements for all periods presented are referred to as “Consolidated and Combined Financial Statements”). The Consolidated and Combined Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

All intracompany transactions have been eliminated for all periods presented. As described in Note 5. Related Party Transactions with Honeywell, all significant transactions between the Company and Honeywell occurring prior to the Spin-Off have been included in these Consolidated and Combined Financial Statements.

While the Company was owned by Honeywell, a centralized approach to cash management and financing was used. Prior to the consummation of the Spin-Off, the majority of the Company’s cash was transferred to Honeywell daily and Honeywell funded the Company’s operating and investing activities as needed.

The combined financial statements prior to the Spin-Off include certain assets and liabilities that have historically been held at Honeywell corporate level but were specifically identifiable or otherwise attributable to the Company. The cash and cash equivalents held by Honeywell at the corporate level were not specifically identifiable to the Company and therefore were not attributed. Honeywell third-party debt and the related interest expense were not allocated as Honeywell’s borrowings were not directly attributable to the company. In periods subsequent to the Spin-Off, the Company made adjustments to balances transferred at the Spin-Off, including adjustments to the classification of assets or liabilities transferred. Any such adjustments are recorded directly to equity in Adjustments due to the Spin-Off and are considered immaterial.

Prior to the Spin-Off, Honeywell provided certain services, such as legal, accounting, information technology, human resources and other infrastructure support, on behalf of the Company. The cost of these services has been allocated to the Company on the basis of the proportion of net revenue. The Company and Honeywell consider these allocations to be a reasonable reflection of the benefits received by the Company. However, the financial information presented in these Consolidated and Combined Financial Statements may not reflect the consolidated and combined financial position, operating results and cash flows of the Company had the Company been a separate stand-alone entity during the periods presented. Actual costs that would have been incurred if the Company had been a stand-alone company would depend on multiple factors, including organizational structure and strategic decisions made in various areas, including information technology and infrastructure. Both Resideo and Honeywell consider the basis on which the expenses have been allocated to be a reasonable reflection of the utilization of services provided to or the benefits received by the Company during the periods presented. After the Spin-Off, a number of the above services have continued under a Transition Service Agreement with Honeywell, which the Company expenses as incurred based on the contractual pricing terms.

The Company reports financial information on a fiscal quarter basis using a “modified” 4-4-5 calendar (modified in that the fiscal year always begins on January 1 and ends on December 31) that requires its businesses to close their first, second and third quarter books on a Saturday in order to minimize the potentially disruptive effects of quarterly closing on business processes. The effects of this practice are generally not significant to reported results for any quarter and only exist within a reporting year.

Reclassification

On January 1, 2020, the Company changed its classification of research and development expenses in the Consolidated and Combined Statements of Operations from Cost of goods sold to Selling, general and administrative expenses, such that research and development expenses are excluded from the calculation of Gross profit. This change had no impact on Net income and earnings per share or the Consolidated Balance Sheet, Consolidated and Combined Statements of Cash Flow or Equity. The Company determined the impact on previously issued consolidated and combined annual and interim financial statements was not material. The impact for the years ended December 31, 2019 and 2018 was a decrease in Cost of goods sold, an increase in Gross profit and in Selling, general and administrative expenses of $87 million and $59 million, respectively. The impact of the reclassification for the year ended December 31, 2019 is also reflected in Note 7. Restructuring Charges and Note 23. Unaudited Quarterly Financial Information.

In addition, the prior year segment information was recast to present Corporate separately. See Note 21. Segment Financial Data for additional information. Certain reclassifications have been made to the prior period financial statements to conform to the classification adopted in the current period.

Issuance of Common Stock through Public Offering

On November 17, 2020, the Company entered into an underwriting agreement (the “Underwriting Agreement”) which provided for the offer and sale by the Company of 17,000,000 shares of common stock of the Company at the public offering price of $15.00 per share (the “Offering”). The Offering closed on November 20, 2020. On December 14, 2020, the Company completed the closing of the exercise of the underwriters’ option to purchase an additional 2,550,000 shares of common stock of the Offering price of $15.00 per share as allowed in the Underwriting Agreement. The Company received net proceeds of approximately $279 million, after deducting underwriting discounts of $13 million and offering expenses payable by the Company of $1 million.