| Summary of Significant Accounting Policies (Policies) | 12 Months Ended |
| Dec. 31, 2018 |
| Accounting Policies [Abstract] | |
| Accounting Principles | Accounting Principles —The financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America. The following is a description of Resideo’s significant accounting policies. |
| Principles of Consolidation | Principles of Co nsolidation —The Consolidated and Combined Financial Statements incl ude the accounts of Resideo Technologies, Inc. and all of its subsidiaries in which a controlling interest is maintained. All intercompany transactions and balances are eliminated in consolidation. |
| Cash and Cash Equivalents | Cash and Cash Equivalents —Cash and cash equivalents include cash on hand and highly liquid investments having an original maturity of three months or less. |
| Trade Receivables and Allowance for Doubtful Accounts | Trade Receivables and Allowance for Doubtful Accounts —Trade accounts receivable are recorded at the invoiced amount as a result of transactions with customers. The Company maintains allowances for doubtful accounts for estimated losses as a result of customers’ inability to make required payments. The Company estimates anticipated losses from doubtful accounts based on days past due as measured from the contractual due date and historical collection history. The Company also takes into consideration changes in economic conditions that may not be reflected in historical trends, for example customers in bankruptcy, liquidation or reorganization. Receivables are written-off against the allowance for doubtful accounts when they are determined uncollectible. Such determination includes analysis and consideration of the particular conditions of the account, including time intervals since last collection, customer performance against agreed upon payment plans, solvency of customer and any bankruptcy proceedings. |
| Inventories | Inventories —Inventories in the Products and Solutions business are stated at the lower of cost or net realizable value, determined on a first-in, first-out basis, including direct material costs and direct and indirect manufacturing costs, or net realizable value. Inventories in the Global Distribution business are stated at average cost. Reserves are maintained for obsolete, inactive and surplus items. |
| Property, Plant and Equipment | Property, Plant and Equipment —Property, plant and equipment are recorded at cost, less accumulated depreciation. For financial reporting, the straight-line method of depreciation is used over the estimated useful lives of 10 to 50 years for buildings and improvements, 3 to 16 years for machinery and equipment and 3 to 10 years for tooling equipment. |
| Goodwill | Goodwill —Goodwill is subject to impairment testing annually as of October 1, and whenever events or changes in circumstances indicate that the carrying amount may not be fully recoverable. This testing compares carrying values to fair values and, when necessary, the carrying value of these assets is impaired. The Company completed its annual goodwill impairment test as of the Spin-Off date and determined that no impairment was necessary. No impairment indicators have been identified since the last impairment test date. |
| Other Intangible Assets with Determinable Lives | Other Intangible Assets with Determinable Lives —Other intangible assets with determinable lives consist of customer lists, technology, patents and trademarks and software intangibles and are amortized over their estimated useful lives, ranging from 4 to 15 years. |
| Warranties and Guarantees | Warranties and Guarantees —Expected warranty costs for products sold are recognized based on an estimate of the amount that eventually will be required to settle such obligations. These accruals are based on factors such as past experience, length of the warranty and various other considerations. Costs of product recalls, which may include the cost of the product being replaced as well as the customer’s cost of the recall, including labor to remove and replace the recalled part, are accrued as part of the warranty accrual at the time an obligation becomes probable and can be reasonably estimated. These estimates are adjusted from time to time based on facts and circumstances that impact the status of existing claims. |
| Revenue Recognition | Revenue Recognition — Product and service revenues are recognized when or as the Company transfers control of the promised products or services to the customer. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. In the sale of products, the terms of a contract or the historical business practice can give rise to variable consideration due to, but not limited to, discounts and bonuses. The Company estimates variable consideration at the most likely amount that will be received from customers and reduce revenues recognized accordingly. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to the Company. The Company adopted the revenue recognition standard as of January 1, 2018 (see Note 6 Revenue Recognition and Contracts with Customers). Prior to adoption, product and service revenues were recognized when there was evidence of a sales agreement, delivery of goods had occurred or services had been rendered, the sales price was fixed or determinable, and the collectability of revenue was reasonably assured. Service sales, principally representing network subscription services, were recognized over the contractual period or as services were rendered. Revenues from contracts with multiple element arrangements were recognized as each element was earned based on the relative fair value of each element provided the delivered elements had value to customers on a stand-alone basis. Amounts allocated to each element were based on its objectively determined fair value, such as the sales price for the product or service when it was sold separately or competitor prices for similar products or services. Sales incentives and allowances were recognized as a reduction to revenue at the time of the related sale. Sales, use and value added taxes collected by the Company and remitted to various government authorities were not recognized as revenues and are reported on a net basis. Shipping and handling fees billed to customers were included in Cost of goods sold. |
| Royalty | Royalty — The Company and Honeywell entered into a 40-year Trademark License Agreement (“the Trademark Agreement”) that authorizes the Company’s use of certain licensed trademarks in the operation of Resideo’s business for the advertising, sale and distribution of certain licensed products. In exchange, the Company will pay a royalty fee of 1.5% of net revenue of the licensed products to Honeywell which is recorded in Selling, general and administrative expense on the Consolidated and Combined Statement of Operations. |
| Environmental | Environmental —The Company accrues costs related to environmental matters when it is probable that it has incurred a liability related to a contaminated site and the amount can be reasonably estimated. Environmental costs are presented within Cost of goods sold for operating sites and Other expense, net for non-operating sites in the Consolidated and Combined Statements of Operations. For additional information, see Note 21 . Commitments and Contingencies. |
| Honeywell Reimbursement Agreement | Honeywell Reimbursement Agreement — In connection with the Spin-Off, the Company entered into an Indemnification and Reimbursement Agreement with Honeywell (the “Honeywell Reimbursement Agreement”) on October 14, 2018, pursuant to which it has an obligation to make cash payments to Honeywell in amounts equal to 90% of payments, which include amounts billed, with respect to certain environmental claims, remediation and, to the extent arising after the Spin-Off, hazardous exposure or toxic tort claims, in each case, including consequential damages (the “liabilities”) in respect of specified properties contaminated through historical business operations, including the legal and other costs of defending and resolving such liabilities, less 90% of Honeywell’s net insurance receipts relating to such liabilities, and less 90% of the net proceeds received by Honeywell in connection with (i) affirmative claims relating to such liabilities, (ii) contributions by other parties relating to such liabilities and (iii) certain property sales. The amount payable in respect of such liabilities arising in any given year is subject to a cap of $140 million (exclusive of any late payment fees up to 5% per annum). Honeywell reimbursement expenses are presented within Other expense, net in the Consolidated and Combined Statement of Operations and within Accrued liabilities and Obligations payable to Honeywell in the Consolidated and Combined Balance She et. For additional information, see Note 21. Commitments and Contingencies. |
| Tax Indemnification Agreement | Tax Indemnification Agreement —The Tax Matters Agreement provides that Resideo is required to indemnify Honeywell for any taxes (and reasonable expenses) resulting from the failure of the Spin-Off and related internal transactions to qualify for their intended tax treatment under U.S. federal, state and local income tax law, as well as foreign tax law, where such taxes result from (a) breaches of covenants and representations we make and agree to in connection with the Spin-Off, (b) the application of certain provisions of U.S. federal income tax law to these transactions or (c) any other action or omission (other than actions expressly required or permitted by the Separation and Distribution Agreement, the Tax Matters Agreement or other ancillary agreements) we take after the consummation of the Spin-Off that gives rise to these taxes. As of December 31, 2018, the Company has indemnified Honeywell for $153 million. See “Certain Relationships and Related Party Transactions—Agreements with Honeywell—Tax Matters Agreement.” |
| Research and Development | Research and Development —The Company conducts research and development (“R&D”) activities, which consist primarily of the development of new products and product applications. R&D costs are charged to expense as incurred. Such costs are included in Cost of goods sold and amount to $ 105 million, $1 20 million and $1 06 million for the years ended December 31, 201 8 , 201 7 and 201 6 , respectively |
| Stock-Based Compensation Plans | Stock-Based Compensation Plans —The principal awards issued under Resideo’s stock-based compensation plans, which are desc ribed in Note 20. Stock-Based Compensation Plans, are restricted stock units. The cost for such awards is measured at the grant date based on the fair value of the award. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods (generally the vesting period of the equity award) and is included in Selling, general and administrative expenses in the Consolidated and Combined Statements of Operations. Forfeitures are estimated at the time of grant to recognize expense for those awards that are expected to vest and are based on historical forfeiture rates. |
| Pension Benefits | Pension Benefits — The guidance requires that the Company disaggregates the service cost component of net benefit costs and report those costs in the same line item or items in the Consolidated Statement of Operations as other compensation costs arising from services rendered by the pertinent employees during the period. The other non-service components of net benefit costs are required to be presented separately from the service cost component and outside of income from operations. The Company has recorded the service cost component of Pension ongoing (income) expense in Costs of goods sold and Selling, general and administrative expenses. The remaining components of net benefit costs within Pension ongoing (income) expense, primarily interest costs and assumed return on plan assets, are recorded in Other expense, net. The Company recognizes net actuarial gains or losses in excess of 10% of the greater of the fair value of plan assets or the plans’ projected benefit obligation (the corridor) annually in the fourth quarter each year (MTM Adjustment). The MTM Adjustment will also be reported in Other expense, net. |
| Foreign Currency Translation | Foreign Currency Translation —Assets and liabilities of operations outside the United States with a functional currency other than U.S. Dollars are translated into U.S. Dollars using year-end exchange rates. Revenue, costs and expenses are translated at the average exchange rates in effect during the year. Foreign currency translation gains and losses are included as a component of Accumulated other comprehensive income (loss). |
| Income Taxes | Income Taxes —Significant judgment is required in evaluating tax positions. The Company establishes additional reserves for income taxes when, despite the belief that tax positions are fully supportable, there remain certain positions that do not meet the minimum recognition threshold. The approach for evaluating certain and uncertain tax positions is defined by the authoritative guidance which determines when a tax position is more likely than not to be sustained upon examination by the applicable taxing authority. In the normal course of business, the Company and its subsidiaries are examined by various federal, state and foreign tax authorities. The Company regularly assesses the potential outcomes of these examinations and any future examinations for the current or prior years in determining the adequacy of its provision for income taxes. The Company continually assesses the likelihood and amount of potential adjustments and adjust the income tax provision, the current tax liability and deferred taxes in the period in which the facts that give rise to a change in estimate become known. |
| Earnings (Loss) Per Share | Earnings (Loss) Per Share — Basic earnings (loss) per share is based on the weighted average number of common shares outstanding. Diluted earnings (loss) per share is based on the weighted average number of common shares outstanding and all dilutive potential common shares outstanding. For additional information, see Note 3. Earnings Per Share. |
| Use of Estimates | Use of Estimates —The preparation of the Company ’s Consolidated and Combined Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts in the Consolidated and Combined Financial Statements and related disclosures in the accompanying Notes. Actual results could differ from those estimates. Estimates and assumptions are periodically reviewed and the effects of changes are reflected in the Consolidated and Combined Financial Statements in the period they are determined to be necessary. Estimates are used when accounting for, stock-based compensation, pension benefits, contingent consideration, indemnification liabilities, goodwill and intangible assets, and valuation allowances for receivables and inventory reserves, deferred tax assets, and the amounts of revenue and expenses reported during the period. |
| Reclassification | Reclassification — A reclassification of a prior period amount has been made to conform to the presentation adopted for the current period. For the years ended December 31, 2017 and December 31, 2016 we reclassified $(2) and $(3) million respectively from Interest to Other expense, net in the Consolidated and Combined Statement of Operations to conform with the current period presentation. |
| Recent Accounting Pronouncements | Recent Accounting Pronouncements —The Company considers the applicability and impact of all recent 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 an immaterial impact on the combined financial position or results of operations. In February 2016, the FASB issued new guidance on accounting for leases, which was further amended in July 2018 and December 2018. The new guidance requires lessees to recognize most leases on their balance sheets for the rights and obligations created by those leases, but does not significantly impact the manner in which expense is recognized on the income statement. Enhanced disclosures regarding the amount, timing, and uncertainty of cash flows arising from leases are also required. Lessor accounting is substantially unchanged from existing guidance. The Company adopted the new guidance effective January 1, 2019, and will apply the changes prospectively, recognizing a cumulative-effect adjustment to the beginning balance of retained earnings as of the adoption date. The primary impact upon adoption of the new guidance is the recognition of right of use assets and lease liabilities for qualifying operating leases on the Company’s balance sheet, predominantly related to real estate. Upon adoption, the Company currently expects to recognize an aggregate lease liability ranging from $105 million to $117 million, with a corresponding right of use asset, calculated based on the present value of the remaining minimum lease payments for qualifying leases as of January 1, 2019. The adoption of the new guidance is not expected to have a material impact to the consolidated statements of operations, stockholders’ equity, and cash flows. The new guidance also provides practical expedients and policy elections for an entity’s ongoing accounting. The Company will elect the short-term lease exception for qualifying leases, which excludes those leases that qualify as short-term leases from lease liability and right of use asset recognition. The Company also currently expects to elect the practical expedient to not separate lease and non-lease components for its real estate and automobile leases. In October 2016, the FASB issued an accounting standard update which requires an entity to recognize the income tax consequences of an intra- entity transfer of an asset, other than inventory, at the time the entity transfer occurs rather than when the asset is ultimately transferred to a third party, as required under current U.S. GAAP. The guidance is intended to reduce diversity in practice, particularly for transfers involving intellectual property. Subsequent to 2017 fiscal year, the Company adopted the accounting standard update as of January 1, 2018. The guidance requires application on a modified retrospective basis. The adoption of this guidance increases the Company’s deferred tax assets by approximately $0.2 million with a cumulative-effect adjustment to retained earnings of the same amount. In January 2017, the FASB issued guidance which eliminates the two-step process that required identification of potential impairment and a separate measure of the actual impairment. The annual assessment of goodwill impairment will be determined by using the difference between the carrying amount and the fair value of the reporting unit. The standard is effective for annual and interim impairment tests performed in periods beginning after December 15, 2019 and is to be applied on a prospective basis. The Company early adopted this standard as of Spin-Off date. The adoption had no impact on the consolidated financial statements as of the date of adoption or for the year ended December 31, 2018. In February 2018, the FASB issued guidance that allows for an entity to elect to reclassify the income tax effects on items within accumulated other comprehensive income resulting from the U.S. Tax Cuts and Jobs Act (“U.S. Tax Reform”) to retained earnings. The guidance is effective for fiscal years beginning after December 15, 2018 with early adoption permitted, including interim periods within those years. Upon adoption, the Company does not expect to elect to reclassify the stranded income tax effects of U.S. Tax Reform from accumulated other comprehensive income to retained earnings. In August 2018, the FASB issued guidance which amends the current disclosure requirements regarding defined benefit pensions and other post retirement plans and allows for the removal of certain disclosures, while adding certain new disclosure requirements. This standard is effective for fiscal years beginning after December 15, 2020 and allows for early adoption. The Company does not expect this new standard to have a significant impact to its disclosures. Recently Adopted Accounting Pronouncement On January 1, 2018, the Company adopted new guidance on revenue from contracts with customers using the modified retrospective method applied to contracts that were not completed as of January 1, 2018. As a result of adopting the new guidance, the Company determined there are no material impacts on the Consolidated and Combined Financial Statements as the Company’s previous revenue recognition was consistent with the new standard. |
