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Summary of Significant Accounting Policies (Policies) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Business Description and Basis of Presentation | Organization and Description of the Business Federal Signal Corporation was founded in 1901 and was reincorporated as a Delaware corporation in 1969. References herein to the “Company,” “we,” “our” or “us” refer collectively to Federal Signal Corporation and its subsidiaries. Products manufactured and services rendered by the Company are divided into two reportable segments: Environmental Solutions Group and Safety and Security Systems Group. The individual operating businesses are organized as such because they share certain characteristics, including technology, marketing, distribution and product application, which create long-term synergies.
Fiscal period | Our fiscal year ends on December 31. All references to 2018, 2017 and 2016 relate to the fiscal year unless otherwise indicated.
Basis of Presentation and Consolidation | Basis of Presentation and Consolidation The accompanying consolidated financial statements represent the consolidation of Federal Signal Corporation and its subsidiaries and have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”). Intercompany balances and transactions have been eliminated in consolidation. In addition, certain prior year amounts have been reclassified to conform to current year presentation.
New Accounting Standards Adopted in 2018 | New Accounting Standards Adopted in 2018 In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (“Topic 606”), which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) 605, Revenue Recognition. Topic 606 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. The Company adopted this guidance on January 1, 2018 using the modified retrospective transition method. See Note 2 – Revenue Recognition for further details. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Payments, which provides additional guidance on the financial statement presentation of certain activities in the statement of cash flows. The activities addressed by this guidance that may be relevant to the Company include cash payments for debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims and proceeds from the settlement of corporate-owned life insurance policies, and the application of the predominance principle. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. The amendments in this ASU should be applied using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted this guidance on January 1, 2018 and concluded that it did not have a material impact on its historical cash flow presentation. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory. This guidance requires the income tax consequences of an intra-entity transfer of an asset other than inventory to be recognized when the transfer occurs, instead of when the asset is sold to an outside party. The pronouncement is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, with early adoption permitted. The amendments in this ASU should be applied on a modified retrospective basis, with an adjustment reflecting the cumulative effect of adoption being recorded directly to retained earnings as of the beginning of the period of adoption. The Company adopted this guidance on January 1, 2018 and concluded that it did not have a material impact on its consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment, which eliminates the second step of the two-step quantitative approach for testing goodwill for potential impairment. An entity will therefore perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognize an impairment charge for the amount by which the carrying amount exceeds the fair value, not to exceed the total amount of goodwill allocated to the reporting unit. An entity still has the option to perform a qualitative assessment to determine if the quantitative impairment test is necessary. ASU 2017-04 is effective for fiscal years beginning after December 15, 2019 on a prospective basis, with early adoption permitted. The Company elected to early adopt this guidance on January 1, 2018, and applied it to its goodwill impairment testing in 2018. In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715), Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This guidance requires that entities present the service cost component of net periodic pension expense in the same income statement line items as other employee compensation costs. All other components of net periodic pension cost should be reported separately from the service cost component and outside a subtotal of operating income. The Company adopted this guidance effective January 1, 2018 following the retrospective method of adoption. The Consolidated Statements of Operations presented herein have been recast to present components of net periodic pension expense, other than service cost, as a component of Other expense (income), net or Pension settlement charges, as applicable. The following table summarizes the impact of ASU 2017-07 on the Company’s previously reported Consolidated Statements of Operations:
| For the Year Ended December 31, 2017 |  | For the Year Ended December 31, 2016
(in millions) | As Reported |  | Impact of Adoption |  | As Adjusted |  | As Reported |  | Impact of Adoption |  | As Adjusted
Cost of sales | $ | 677.3 |  |  | $ | — |  |  | $ | 677.3 |  |  | $ | 524.8 |  |  | $ | (0.3 | ) |  | $ | 524.5 |
Selling, engineering, general and administrative expenses | 144.7 |  |  | (0.4 | ) |  | 144.3 |  |  | 122.3 |  |  | (2.8 | ) |  | 119.5 |
Pension settlement charges (operating expense) | 6.1 |  |  | (6.1 | ) |  | — |  |  | — |  |  | — |  |  | — |
Pension settlement charges (non-operating expense) | — |  |  | 6.1 |  |  | 6.1 |  |  | — |  |  | — |  |  | — |
Other expense (income), net | (1.2 | ) |  | 0.4 |  |  | (0.8 | ) |  | (1.3 | ) |  | 3.1 |  |  | 1.8 |
In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities, which intends to better align risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and presentation of hedge results. The amendments also make certain targeted improvements to simplify the application of the hedge accounting guidance by easing certain documentation and assessment requirements. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The amendments in this ASU should be applied on a modified retrospective or prospective basis, depending on the area covered by the update. The Company elected to early adopt this guidance on January 1, 2018 and concluded that it did not have a material impact on its consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, that permits entities to reclassify tax effects stranded in accumulated other comprehensive income as a result of the Tax Cuts and Jobs Act (the “2017 Tax Act”) to retained earnings. ASU 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. During the fourth quarter of 2018, the Company elected to early adopt ASU 2018-02 and recorded an adjustment to reclassify the stranded tax effects resulting from the 2017 Tax Act. The reclassification adjustment of $10.6 million resulted in an increase of Retained earnings and Accumulated other comprehensive loss on the Company’s Consolidated Balance Sheet. Impact of the Adoption of Topic 606 On January 1, 2018, the Company adopted Topic 606 following the modified retrospective method of adoption applied to those contracts that were not completed as of the date of adoption. In accordance with the Topic 606 transition guidance, the financial information in the comparative periods presented herein has not been restated and continues to be reported under the accounting standards in effect for those periods. The adoption of Topic 606 did not have a material impact on the Company’s financial position, results of operations or cash flows. However, the Company’s Consolidated Statement of Operations for the year ended December 31, 2018 includes a reduction in Net sales of approximately 1% within the Environmental Solutions Group based on a revised “Principal vs. Agent” analysis resulting in a change from gross to net presentation, with a corresponding reduction in Cost of sales. The following table summarizes the impact of the adoption of Topic 606 on the Company’s Consolidated Statements of Operations for the year ended December 31, 2018:
| Year Ended December 31, 2018
(in millions) | As Reported |  | Balances Without Adoption of Topic 606 |  | Effect of Change
Net sales | $ | 1,089.5 |  |  | $ | 1,104.8 |  |  | $ | (15.3 | )
Cost of sales | 807.4 |  |  | 822.7 |  |  | (15.3 | )
Gross profit | $ | 282.1 |  |  | $ | 282.1 |  |  | $ | — |
Non-U.S. Operations | Non-U.S. Operations Assets and liabilities of non-U.S. subsidiaries, other than those whose functional currency is the U.S. dollar, are translated at current exchange rates with the related translation adjustments reported in stockholders’ equity as a component of Accumulated other comprehensive loss. Accounts within the Consolidated Statements of Operations are translated at the average exchange rate during the period. Non-monetary assets and liabilities are translated at historical exchange rates. Relating to transactions that are denominated in a currency other than the functional currency, the Company incurs foreign currency transaction gains or losses, which are recognized in the Consolidated Statements of Operations as a component of Other expense (income), net. For the years ended December 31, 2018 and 2016, the Company incurred foreign currency transaction losses of $0.4 million and $0.1 million, respectively, and in the year ended December 31, 2017, the Company realized foreign currency transaction gains of $1.3 million.
Use of Estimates | Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect (i) the reported amounts of assets and liabilities, (ii) the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and (iii) the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash Equivalents | Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less, when purchased, to be cash equivalents. The carrying amount of cash and cash equivalents approximates fair value because of the short-term maturity and highly liquid nature of these instruments.
Accounts Receivable | Accounts Receivable The Company carries accounts receivable at the face amount less an allowance for doubtful accounts for estimated losses as a result of a customer’s inability to make required payments. Management evaluates the aging of the accounts receivable balances, the financial condition of its customers, historical trends and the time outstanding of specific balances to estimate the amount of accounts receivables that may not be collected in the future and records the appropriate provision.
Inventories | Inventories The Company’s inventories are valued at the lower of cost and net realizable value. Cost is determined using the first-in, first-out method. Included in the cost of inventories are raw materials, direct wages and associated production costs.
Properties and Equipment | Properties and Equipment Properties and equipment are stated at cost, net of accumulated depreciation. Depreciation is recorded using the straight-line method over the estimated useful lives of the assets. Useful lives generally range from eight to 40 years for buildings and three to 15 years for machinery and equipment. Leasehold improvements are depreciated over the shorter of the remaining life of the lease or the useful life of the improvement. Depreciation expense is primarily included as a component of Cost of sales on the Consolidated Statements of Operations, with depreciation expense associated with certain assets used for administrative purposes being presented within Selling, engineering, general and administrative (“SEG&A”) expenses. Depreciation expense, which includes depreciation on rental equipment, was $28.4 million, $25.2 million and $18.9 million in the years ended December 31, 2018, 2017 and 2016, respectively. Properties and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Rental Equipment The Company enters into lease agreements with customers related to the rental of certain equipment. All of these leasing agreements are classified as operating leases and are for periods generally not to exceed five years. In accounting for these leases, the cost of the equipment purchased or manufactured by the Company is recorded as an asset and is depreciated over its estimated useful life. Rental income is recognized ratably over the term of the underlying leases. Rental equipment is depreciated to an estimated residual value on a straight-line basis over the estimated useful lives of the assets and is reviewed for potential impairment whenever an event occurs or circumstances change that indicate the carrying amount of an asset may not be recoverable. If circumstances require a long-lived asset or asset group to be tested for possible impairment, the Company first compares non-discounted cash flows expected to be generated by that asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is not recoverable on a non-discounted cash flow basis, an impairment is recognized to the extent that the carrying amount exceeds fair value. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values and third-party independent appraisals, as considered necessary. Rental equipment includes certain equipment that is manufactured by the Company and subsequently transferred to the rental fleet, as well as equipment purchased from third-party manufacturers, for the purpose of renting to end-customers. The related cash flow activity associated with these transactions is reflected within operating activities on the Consolidated Statements of Cash Flows.
Goodwill | Goodwill Goodwill represents the excess of the cost of an acquired business over the amounts assigned to its net assets. Goodwill is not amortized but is tested for impairment at a reporting unit level on an annual basis or more frequently if indicators of impairment exist. The Company performed its annual goodwill impairment test as of October 31, 2018. As discussed within the “New Accounting Standards Adopted in 2018” section above, the Company adopted ASU 2017-04 on January 1, 2018 and applied this guidance to its 2018 annual goodwill impairment test. Under ASU 2017-04, an entity performs the quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognizes an impairment charge for the amount by which the carrying amount exceeds the fair value, not to exceed the total amount of goodwill allocated to the reporting unit. An entity still has the option to perform a qualitative assessment to determine if the quantitative impairment test is necessary. A qualitative approach is applied when the Company concludes that it is not “more likely than not” that the fair value of a reporting unit is less than its carrying value. In this situation, the Company would not be required to perform the quantitative impairment test described above. Management applied the qualitative approach to assess the goodwill of its reporting units for potential impairment in 2018 and concluded that it was not “more likely than not” that the fair value of the Company’s reporting units were less than their carrying values. The Company had no goodwill impairments in 2018, 2017 or 2016. See Note 7 – Goodwill and Other Intangible Assets for a summary of the Company’s goodwill by segment.
Intangible Assets | Intangible Assets Definite-lived intangible assets are amortized on a straight-line basis over the estimated useful lives and are tested for impairment if indicators exist in a manner similar to that described above for Rental Equipment. Indefinite-lived intangible assets are tested for impairment on an annual basis at year-end, or more frequently if an event occurs or circumstances change that indicate the fair value of an indefinite-lived intangible asset could be below its carrying amount. In testing the indefinite-lived intangibles assets for potential impairment, the Company applies either a qualitative test, or a quantitative test, in accordance with ASC 350, Intangibles — Goodwill and Other. A qualitative approach is applied when the Company concludes that it is not “more likely than not” that the fair value of the indefinite-lived intangibles are less than their carrying value. A quantitative impairment test consists of comparing the fair value of the indefinite-lived intangible asset with its carrying amount. An impairment loss would be recognized for the carrying amount in excess of its fair value. Management used a qualitative approach to assess its indefinite-lived intangible assets for potential impairment in 2018, 2017 and 2016. The Company concluded that it was not “more likely than not” that the fair value of indefinite-lived intangible assets were less than their carrying values. The Company had no indefinite-lived intangible asset impairments in 2018, 2017 or 2016. See Note 7 – Goodwill and Other Intangible Assets for a summary of the Company’s intangible assets.
Warranties | Warranties Warranties are classified as either assurance-type or service-type warranties. A warranty is considered an assurance-type warranty if it provides the customer with assurance that the product will function as intended. A warranty that goes above and beyond ensuring basic functionality is considered a service-type warranty. The Company offers certain limited warranties that are assurance-type warranties and extended service arrangements that are service-type warranties. Assurance-type warranties are not accounted for as separate performance obligations under the revenue model. If a service-type warranty is sold with a product or separately, revenue is recognized over the life of the warranty. Sales of many of the Company’s products include assurance-type warranties based on terms that are generally accepted in the Company’s marketplaces. The Company records provisions for estimated warranty costs, which are included within Cost of sales, at the time of sale based on historical experience. The Company periodically adjusts these provisions to reflect actual experience. Infrequently, a material warranty issue can arise which is beyond the scope of the Company’s historical experience. The Company records costs related to these issues as they become probable and estimable. The Company also sells optional service-type warranty contracts that extend coverage beyond the initial term of the express warranty period. At the time of sale, revenue related to the service-type warranty contract is deferred and recognized as income over the life of the contract. As of December 31, 2018 and 2017, deferred revenue associated with service-type warranty contracts was $3.0 million and $2.9 million, respectively, and was included within Other current liabilities and Other long-term liabilities on the Consolidated Balance Sheets. Costs under service-type warranty contracts are expensed as incurred.
Workers' Compensation and Product Liability Reserves | Workers’ Compensation and Product Liability Reserves Due to the nature of the Company’s manufacturing and products, the Company is subject to claims for workers’ compensation and product liability in the normal course of business. The Company is self-funded for a portion of these claims. The Company establishes a reserve using a third-party actuary for any known outstanding matters, including a reserve for claims incurred but not yet reported. The amount and timing of cash payments relating to these claims are considered to be reliably determinable given the nature of the claims and historical claim volumes to support the actuarial assumptions and judgments used to derive the expected loss payment patterns. As such, the reserves recorded are discounted using a risk-free rate that matches the average duration of the claims. The Company has not established a reserve for potential losses resulting from the firefighter hearing loss litigation, with the exception of certain estimated losses that have been recognized related to settlement discussions (see Note 12 – Legal Proceedings). If the Company is not successful in its defense after exhausting all appellate options, it would record a charge for such claims, to the extent they exceed insurance recoveries, when the related losses become probable and estimable.
Pensions | Pensions The Company sponsors domestic and foreign defined benefit pension plans. Key assumptions used in the accounting for these employee benefit plans include the discount rate, expected long-term rate of return on plan assets and estimates of future mortality of plan participants. The weighted-average discount rate used to measure pension liabilities and costs is selected using a hypothetical portfolio of high-quality bonds that would provide the necessary cash flow to match the projected benefit payments of the plans. The discount rate represents the rate at which our benefit obligations could effectively be settled as of the year-end measurement date. The weighted-average discount rate used to measure pension liabilities increased from 2017 to 2018. See Note 10 – Pensions for further discussion. The expected long-term rate of return on plan assets is based on historical and expected returns for the asset classes in which the plans are invested. The Company references the most recent mortality tables and scales published by the Society of Actuaries in determining its estimate of future mortality.
Revenue Recognition | On January 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, as amended, and created by ASU 2014-09, Revenue from Contracts with Customers. See Note 2 – Revenue Recognition for further discussion regarding the impact of the adoption on the Company’s revenue recognition accounting policies. Revenue Recognition Revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied; generally this occurs at a point in time, with the transfer of control of the Company’s products or services to customers. For most of the Company’s product sales, these criteria are met at the time the product is shipped; however, occasionally control passes later or earlier than shipment due to customer contract or letter of credit terms. In circumstances where credit is extended, payment terms generally range from 30 to 120 days and customer deposits may be required. Revenue is measured as the amount of consideration the Company expects to be entitled to in exchange for transferring products or providing services. Expected returns and allowances are estimated and recognized based primarily on an analysis of historical experience, with Net sales presented net of such returns and allowances. The Company enters into sales arrangements that may provide for multiple performance obligations to a customer. These arrangements may include software and non-software components that function together to deliver the products’ essential functionality. The Company identifies all performance obligations that are to be delivered separately under the sales arrangement and allocates revenue to each performance obligation based on its relative standalone selling price. The Company uses an observable price to determine the standalone selling price or a cost plus margin approach when one is not available. In general, performance obligations include hardware, integration and installation services. The allocated revenue for each performance obligation is recognized as such performance obligations are satisfied.
Revenue Recognition, Returns and Allowances | Expected returns and allowances are estimated and recognized based primarily on an analysis of historical experience, with Net sales presented net of such returns and allowances.
Revenue Recognition, Freight Policy | Net sales include sales of products and billed freight related to product sales. Freight has not historically comprised a material component of Net sales.
Product Shipping Costs | Product Shipping Costs Product shipping costs are expensed as incurred and are included within Cost of sales.
Research and Development | Research and Development The Company invests in research to support development of new products and the enhancement of existing products and services. Expenditures for research and development by the Company were $13.0 million in 2018, $13.0 million in 2017 and $13.4 million in 2016, and are included within SEG&A expenses.
Stock-Based Compensation Plans | Stock-Based Compensation Plans The Company has various stock-based compensation plans, described more fully in Note 14 – Stock-Based Compensation. Stock-based compensation expense is recorded net of estimated forfeitures in the Company’s Consolidated Statements of Operations. The Company estimates the forfeiture rate based on historical forfeitures of equity awards and adjusts the rate to reflect changes in facts and circumstances, if any. The Company revises its estimated forfeiture rate if actual forfeitures differ from its initial estimates.
Income Taxes | Income Taxes We file a consolidated U.S. federal income tax return for Federal Signal Corporation and its eligible domestic subsidiaries. Our non-U.S. subsidiaries file income tax returns in their respective local jurisdictions. We account for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax benefit carryforwards. Deferred tax assets and liabilities at the end of each period are determined using enacted tax rates expected to apply to taxable income in the period in which the deferred tax liability or asset is expected to be settled or realized. A valuation allowance is established or maintained when, based on currently available information and other factors, it is more likely than not that all or a portion of a deferred tax asset will not be realized. Accounting standards on accounting for uncertainty in income taxes address the determination of whether tax benefits claimed or expected to be claimed on a tax return should be recorded in the consolidated financial statements. Under the guidance on accounting for uncertainty in income taxes, we may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The guidance on accounting for uncertainty in income taxes also outlines de-recognition and classification, as well as interest and penalties on income taxes.
Litigation Contingencies | Litigation Contingencies The Company is subject to various claims, including pending and possible legal actions for product liability and other damages, and other matters arising in the ordinary course of the Company’s business. The Company believes, based on current knowledge and after consultation with counsel, that the outcome of such claims and actions in the aggregate will not have an adverse effect on the Company’s financial position or results of operations. However, in the event of unexpected future developments, it is possible that the ultimate resolution of such matters, if unfavorable, could have a material adverse effect on the Company’s results of operations. Professional legal fees are expensed when incurred. We accrue for contingent losses when such losses are probable and reasonably estimable. In the event that estimates or assumptions of contingent losses are different from actual results, adjustments are made in subsequent periods to reflect more current information.

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