Arcosa (ACA) 10-Q 3 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 15, 2019
Entity Information [Line Items]
Entity Registrant Name	Arcosa, Inc.
Entity Central Index Key	0001739445
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period	Q1
Current Fiscal Year End Date	--12-31
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Filer Category	Non-accelerated Filer
Entity common stock, shares outstanding		48,349,198

Consolidated and Combined State

Consolidated and Combined Statements of Operating Income (unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues		$ 410.9	$ 354.4
Operating costs:
Cost of revenues		332.8	285.6
Selling, engineering, and administrative expenses		40.8	37.6
Total operating costs		373.6	323.2
Total operating profit		37.3	31.2
Interest expense		1.9	0
Other, net (income) expense		(0.2)	1
Income before income taxes		35.6	30.2
Provision for income taxes		7.9	8
Net income		$ 27.7	$ 22.2
Net income per common share:
Basic (in dollars per share)		$ 0.57	$ 0.45
Diluted (in dollars per share)		$ 0.56	$ 0.45
Weighted average number of shares outstanding
Basic (in shares)	[1]	47.9	48.8
Diluted (in shares)	[1]	48.5	48.8
Dividends declared per common share		$ 0.05	$ 0
[1]	For periods prior to the Separation, the denominator for basic and diluted net income per common share was calculated using the 48.8 million shares of common stock outstanding immediately following the Separation.

Consolidated and Combined Sta_2

Consolidated and Combined Statements of Comprehensive Income Consolidated and Combined Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 27.7	$ 22.2
Derivative financial instruments:
Unrealized losses arising during the period, net of tax expense (benefit) of ($0.2) and $0.0	(1)	0
Reclassification adjustments for losses included in net income, net of tax expense (benefit) of $0.0 and $0.0	0.1	0
Currency translation adjustment:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of ($0.2) and $0.0	0.3	0.3
Other comprehensive income (loss)	(0.6)	0.3
Comprehensive income	$ 27.1	$ 22.5

Consolidated and Combined Sta_3

Consolidated and Combined Statements of Comprehensive Income Consolidated and Combined Statements of Comprehensive Income (parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized losses arising during the period, tax expense (benefit)	$ (0.2)	$ 0
Reclassification adjustments for losses included in net income, tax expense (benefit)	0	0
Unrealized gains (losses) arising during the period, net of tax expense (benefit)	$ (0.2)	$ 0

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions	Mar. 31, 2019	[1]	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 118		$ 99.4
Receivables, net of allowance	206.2		291.4
Inventories:
Raw materials and supplies	131.3		128.4
Work in process	42.6		33.3
Finished goods	97.6		90.8
Total inventory	271.5		252.5
Other	22.1		23.7
Total current assets	617.8		667
Property, plant, and equipment, net	801.9		803
Goodwill	616.3		615.2
Deferred income taxes	7.3		6.9
Other assets	99.5		80.1
Total assets	2,142.8		2,172.2
Current liabilities:
Accounts payable	79.3		86.2
Accrued liabilities	164.7		146.2
Current portion of long-term debt	1.8		1.8
Total current liabilities	245.8		234.2
Debt	103.3		183.7
Deferred income taxes	61.7		58.3
Other liabilities	26.8		11.5
Total liabilities	437.6		487.7
Stockholders' equity:
Common stock	0.5		0.5
Capital in excess of par value	1,690.2		1,685.7
Retained earnings	44.7		19.5
Accumulated other comprehensive loss	(18.3)		(17.7)
Treasury stock	11.9		3.5
Total stockholders' equity	1,705.2		1,684.5
Total liabilities and stockholders' equity	$ 2,142.8		$ 2,172.2
[1]	Unaudited

Consolidated Balance Sheets Con

Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - shares	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, shares authorized	200,000,000	200,000,000

Consolidated and Combined Sta_4

Consolidated and Combined Statements of Cash Flows (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Operating activities:
Net income	$ 27.7		$ 22.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization	19.8		17.1
Stock-based compensation expense	3.4		2.2
Provision for deferred income taxes	3.4		2.7
Gains on dispositions of property and other assets	(0.4)		(0.1)
(Increase) decrease in other assets	(1.2)		0.8
Increase (decrease) in other liabilities	1.9		(0.4)
Other	(1.2)		0
Changes in current assets and liabilities:
(Increase) decrease in receivables	85.2		35.5
(Increase) decrease in inventories	(17.5)		14.5
(Increase) decrease in other current assets	1.6		1.6
Increase (decrease) in accounts payable	(6.9)		(0.3)
Increase (decrease) in accrued liabilities	9.2		(6.2)
Net cash provided by operating activities	125		89.6
Investing activities:
Proceeds from dispositions of property and other assets	0.7		0.7
Capital expenditures	(18)		(7.6)
Acquisitions, net of cash acquired	0		(25)
Net cash required by investing activities	(17.3)		(31.9)
Financing activities:
Payments to retire debt	(80.4)		0
Shares repurchased	6		0
Dividends paid to common shareholders	(2.5)		0
Purchase of shares to satisfy employee tax on vested stock	(0.2)		0
Net transfers from/(to) Former Parent and affiliates	0		(54.8)
Proceeds from (Payments for) Other Financing Activities	0		(3)
Net cash required by financing activities	(89.1)		(57.8)
Net increase (decrease) in cash and cash equivalents	18.6		(0.1)
Cash and cash equivalents at beginning of period	99.4		6.8
Cash and cash equivalents at end of period	$ 118	[1]	$ 6.7
[1]	Unaudited

Consolidated and Combined Sta_5

Consolidated and Combined Statement of Stockholder's Equity Consolidated and Combined Statement of Stockholder's Equity (unaudited) - USD ($) $ in Millions	Total		Former Parent's Net Investment	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2017	$ 1,407.9		$ 1,427.7	$ 0	$ 0	$ 0	$ (19.8)	$ 0
Beginning balance, shares at Dec. 31, 2017				0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting new accounting standard	(4)		(4)
Net income	22.2		22.2
Other comprehensive income (loss)	0.3						0.3
Net transfers from parent and affiliates	(56.2)		(56.2)
Dividends paid to common shareholders	0
Restricted shares, net	2.2		2.2
Ending balance at Mar. 31, 2018	1,372.4		1,391.9	$ 0	0	0	(19.5)	$ 0
Ending balance, shares at Mar. 31, 2018				0				0
Beginning balance at Dec. 31, 2018	1,684.5		0	$ 0.5	1,685.7	19.5	(17.7)	$ (3.5)
Beginning balance, shares at Dec. 31, 2018				48,800,000				(100,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27.7		0			27.7
Other comprehensive income (loss)	(0.6)						(0.6)
Dividends paid to common shareholders	(2.5)		0			(2.5)
Restricted shares, net	$ 3.2		0		3.6			$ (0.4)
Shares repurchased, shares	269,574							(300,000)
Shares repurchased	$ (8)							$ (8)
Stockholders' equity, other	0.9				0.9
Ending balance at Mar. 31, 2019	$ 1,705.2	[1]	$ 0	$ 0.5	$ 1,690.2	$ 44.7	$ (18.3)	$ (11.9)
Ending balance, shares at Mar. 31, 2019				48,800,000				(400,000)
[1]	Unaudited

Consolidated and Combined Sta_6

Consolidated and Combined Statement of Stockholder's Equity Consolidated and Combined Statement of Stockholder's Equity (parenthetical)	Mar. 31, 2019$ / shares
Statement of Stockholders' Equity [Abstract]
Par value of common stock	$ 0.01

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Overview and Summary of Significant Accounting Policies Basis of Presentation On November 1, 2018, Arcosa, Inc. and its consolidated subsidiaries (“Arcosa,” the “Company,” “we,” or “our”) became an independent publicly-traded company as a result of the distribution by Trinity Industries, Inc. (“Trinity” or “Former Parent”) of 100% of the outstanding shares of Arcosa, Inc. to Trinity’s stockholders (the “Separation”). Trinity stockholders received one share of Arcosa, Inc. common stock for every three shares of Trinity common stock held as of 5:00 p.m. local New York City time on October 17, 2018, the record date for the distribution. The transaction was structured to be tax-free to both Trinity and Arcosa stockholders for U.S. federal income tax purposes. The accompanying Consolidated and Combined Financial Statements present our historical financial position, results of operations, comprehensive income/loss, and cash flows in accordance with accounting principles generally accepted in the U.S. (“GAAP”). The combined financial statements for periods prior to the Separation were derived from Trinity’s consolidated financial statements and accounting records and prepared in accordance with GAAP for the preparation of carved-out combined financial statements. Through the date of the Separation, all revenues and costs as well as assets and liabilities directly associated with Arcosa have been included in the combined financial statements. Prior to the Separation, the combined financial statements also included allocations of certain selling, engineering, and administrative expenses provided by Trinity to Arcosa and allocations of related assets, liabilities, and the Former Parent’s net investment, as applicable. The allocations were determined on a reasonable basis; however, the amounts are not necessarily representative of the amounts that would have been reflected in the financial statements had the Company been an entity that operated independently of Trinity during the applicable periods. Following the Separation, the consolidated financial statements include the accounts of the Company and its subsidiaries and no longer include any allocations from Trinity. All normal and recurring adjustments necessary for a fair presentation of the financial position of the Company and the results of operations and cash flows have been made in conformity with GAAP. All significant intercompany accounts and transactions have been eliminated. Because of seasonal and other factors, the results of operations for the three months ended March 31, 2019 may not be indicative of expected results of operations for the year ending December 31, 2019 . These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with the audited consolidated and combined financial statements of the Company included in its Annual Report on Form 10-K for the year ended December 31, 2018 . Relationship with Former Parent and Related Entities Prior to the Separation, Arcosa was managed and operated in the normal course of business with other business units of Trinity. The accompanying combined financial results for periods prior to the Separation include sales and purchase transactions with Trinity and its subsidiaries in addition to certain shared costs which have been allocated to Arcosa and reflected as expenses in the Combined Statements of Operations. Transactions and allocations between Trinity and Arcosa are reflected in the Combined Statements of Cash Flows as a financing activity in Net transfers from/(to) Former Parent and affiliates. All transactions and allocations between Trinity and Arcosa prior to the Separation have been deemed paid between the parties, in cash, in the period in which the transaction or allocation was recorded in the Combined Financial Statements. Disbursements and cash receipts were made through centralized accounts payable and cash collection systems, respectively, which were operated by Trinity. As cash was disbursed and received by Trinity, it was accounted for by Arcosa through the Former Parent's net investment account. Allocations of current income taxes receivable or payable prior to the Separation were deemed to have been remitted to Arcosa or Trinity, respectively, in cash, in the period to which the receivable or payable applies. Corporate Costs/Allocations Prior to the Separation, the combined financial results include an allocation of costs related to certain corporate functions incurred by Trinity for services that were provided to or on behalf of Arcosa. Corporate costs have been allocated to Arcosa using methods management believes are consistent and reasonable. Such cost allocations to Arcosa consisted of (1) shared service charges and (2) corporate overhead costs. Shared service charges consisted of monthly charges to each Trinity business unit for certain corporate functions such as information technology, human resources, and legal based on usage rates and activity units. Corporate overhead costs consisted of costs not previously allocated to Trinity's business units and were allocated to Arcosa based on an analysis of each cost function and the relative benefits received by Arcosa for the period. Corporate overhead costs allocated to Arcosa prior to the Separation totaled $7.7 million for the three months ended March 31, 2018 . Corporate overhead costs are included in selling, engineering, and administrative expenses in the accompanying Consolidated and Combined Statements of Operations. Also see Note 4 Segment Information. The Combined Financial Statements of Arcosa may not include all of the actual expenses that would have been incurred had we operated as a standalone company during the periods presented and may not reflect our combined results of operations, financial position, and cash flows had we operated as a standalone company during the periods presented. Actual costs that would have been incurred if we had operated as a standalone company would depend on multiple factors, including organizational structure and strategic decisions made in various areas, including information technology and infrastructure. We also may incur additional costs associated with being a standalone, independent, publicly-traded company that were not included in the expense allocations and, therefore, would result in additional costs that are not reflected in our historical results of operations, financial position, and cash flows. Other Transactions with Trinity Businesses For the three months ended March 31, 2018 , the Company had sales to Trinity businesses of $43.5 million and purchases from Trinity businesses of $12.8 million . Subsequent to the Separation, Trinity is no longer considered a related entity. Stockholders' Equity In December 2018, the Company’s Board of Directors authorized a $50 million share repurchase program effective December 5, 2018 through December 31, 2020. Under the program, the Company repurchased 269,574 shares at a cost of $8.0 million during the three months ended March 31, 2019 , leaving a remaining authorization of $39.0 million . Certain shares of stock repurchased during March 2019, totaling $2.0 million , were cash settled in April 2019 in accordance with normal settlement practices. Revenue Recognition Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of principal activities from which the Company generates its revenue, separated by reportable segments. Payments for our products and services are generally due within normal commercial terms. For a further discussion regarding the Company’s reportable segments, see Note 4 Segment Information. Construction Products Group The Construction Products Group recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Energy Equipment Group Within the Energy Equipment Group, revenue is recognized for our wind tower and certain utility structure product lines over time as the products are manufactured using an input approach based on the costs incurred relative to the total estimated costs of production. We recognize revenue over time for these products as they are highly customized to the needs of an individual customer resulting in no alternative use to the Company if not purchased by the customer after the contract is executed, and we have the right to bill the customer for our work performed to date plus at least a reasonable profit margin for work performed. As of March 31, 2019 , we had a contract asset of $20.4 million related to these contracts, compared to $44.0 million at December 31, 2018 . For all other products, revenue is recognized when the customer has accepted the product and legal title of the product has passed to the customer. Transportation Products Group The Transportation Products Group recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of March 31, 2019 and the percentage of the outstanding performance obligations as of March 31, 2019 expected to be delivered during the remainder of 2019 : Unsatisfied performance obligations at March 31, 2019 Total Amount Percent expected to be delivered in 2019 (in millions) Energy Equipment Group: Wind towers and utility structures $ 549.2 58 % Other $ 53.0 95 % Transportation Products Group: Inland barges $ 383.9 67 % All unsatisfied performance obligations beyond 2019 are expected to be delivered during 2020. Income Taxes Prior to the Separation, the Company’s operating results were included in the Former Parent’s various consolidated U.S. federal and state income tax returns, as well as non-U.S. tax filings. In the Company’s Combined Financial Statements for the periods prior to the Separation, income tax expense and deferred tax balances have been recorded as if the Company filed tax returns on a standalone basis separate from the Former Parent. The separate return method applies the accounting guidance for income taxes to the standalone financial statements as if the Company was a separate taxpayer and a standalone enterprise for the periods presented. The liability method is used to account for income taxes. Deferred income taxes represent the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Valuation allowances reduce deferred tax assets to an amount that will more likely than not be realized. The Company regularly evaluates the likelihood of realization of tax benefits derived from positions it has taken in various federal and state filings after consideration of all relevant facts, circumstances, and available information. For those tax positions that are deemed more likely than not to be sustained, the Company recognizes the benefit it believes is cumulatively greater than 50% likely to be realized. To the extent the Company were to prevail in matters for which accruals have been established or be required to pay amounts in excess of recorded reserves, the effective tax rate in a given financial statement period could be materially impacted. Financial Instruments The Company considers all highly liquid debt instruments to be cash and cash equivalents if purchased with a maturity of three months or less. Financial instruments that potentially subject the Company to a concentration of credit risk are primarily cash investments and receivables. The Company currently places its cash investments primarily in bank deposits and highly-rated money market funds, and its investment policy limits the amount of credit exposure to any one commercial issuer. We seek to limit concentrations of credit risk with respect to receivables with control procedures that monitor the credit worthiness of customers, the large number of customers in the Company's customer base, and their dispersion across different industries and geographic areas. As receivables are generally unsecured, the Company maintains an allowance for doubtful accounts based upon the expected collectibility of all receivables. Receivable balances determined to be uncollectible are charged against the allowance. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values. Derivative Instruments The Company may, from time to time, use derivative instruments to mitigate the impact of changes in interest rates or changes in foreign currency exchange rates. For derivative instruments designated as hedges, the Company formally documents the relationship between the derivative instrument and the hedged item, as well as the risk management objective and strategy for the use of the derivative instrument. This documentation includes linking the derivative to specific assets or liabilities on the balance sheet, commitments, or forecasted transactions. At the time a derivative instrument is entered into, and at least quarterly thereafter, the Company assesses whether the derivative instrument is effective in offsetting the changes in fair value or cash flows of the hedged item. Any change in the fair value of the hedged instrument is recorded in accumulated other comprehensive loss (“AOCL”) as a separate component of stockholders' equity and reclassified into earnings in the period during which the hedged transaction affects earnings. The Company monitors its derivative positions and the credit ratings of its counterparties and does not anticipate losses due to counterparties' non-performance. Recent Accounting Pronouncements Recently adopted accounting pronouncements Effective as of January 1, 2018, the Company adopted Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers,” (“ASU 2014-09”) which provides common revenue recognition guidance for GAAP. Under ASU 2014-09, an entity recognizes revenue when it transfers promised goods or services to customers in an amount that reflects what it expects to receive in exchange for the goods or services. It also requires additional detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company applied ASU 2014-09 to all contracts that were not complete as of January 1, 2018 using the modified retrospective method of adoption, resulting in a reduction to Net Parent Investment of $4.0 million , net of tax, as of January 1, 2018 related to the cumulative effect of applying this standard. The primary impact of adopting the standard is a change in the timing of revenue recognition for our wind towers and certain utility structures product lines within our Energy Equipment Group. Previously, the Company recognized revenue when the product was delivered. Under ASU 2014-09, revenue is recognized over time as the products are manufactured. Revenue recognition policies in our other business segments remain substantially unchanged. Effective as of January 1, 2019, the Company adopted Accounting Standards Update No. 2016-02, “Leases”, (“ASU 2016-02”) which amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The Company elected to use the optional transition method that allows the Company to apply the provisions of the standard at the effective date without adjusting the comparative prior periods. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard which allowed us to carry forward the historical lease classification. The cumulative effect of adopting the standard on the opening balance of retained earnings was not significant. The primary impact of adopting the standard was the recognition of a right-of-use asset and corresponding lease liability for our operating leases included in other assets and other liabilities, respectively, on the Consolidated Balance Sheet. See Note 8 Leases for further discussion. The Company has implemented processes and a lease accounting system to ensure adequate internal controls were in place to assess our contracts and enable proper accounting and reporting of financial information upon adoption. Recently issued accounting pronouncements not yet adopted In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update No. 2016-13, “Financial Instruments - Credit Losses”, (“ASU 2016-13”) which amends the existing accounting guidance for recognizing credit losses on financial assets and certain other instruments not measured at fair value through net income, including financial assets measured at amortized cost, such as trade receivables and contract assets. ASU 2016-13 replaces the existing incurred loss impairment model with an expected credit loss model that requires consideration of a broader range of information to estimate expected credit losses over the lifetime of the asset. The new guidance is expected to result in earlier recognition of credit losses. ASU 2016-13 will become effective for public companies during interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We are currently assessing the effects of the new standard, including its impact on our Consolidated Financial Statements.

Acquisitions and Divestitures

Acquisitions and Divestitures	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures Acquisitions There was no acquisition activity during the three months ended March 31, 2019 . In March 2018, we completed the acquisition of certain assets of an inland barge business with a purchase price and net cash paid of $25.0 million . The acquisition was recorded as a business combination based on valuations of the acquired assets at their acquisition date fair value using level three inputs, defined as unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets. The valuation resulted in the recognition of $9.5 million of goodwill in our Transportation Products Group. Such assets were not significant in relation to assets at the combined or segment level. With regard to the acquisition of ACG Materials (“ACG”) in December 2018, the purchase price allocation continues to be preliminary as of March 31, 2019 . We expect to complete our purchase price allocation as soon as reasonably possible not to exceed one year from the acquisition date. Adjustments to the preliminary purchase price allocation could be material to the purchase price allocation, particularly with respect to our preliminary estimates of depletable land and deferred income taxes. The following table represents our preliminary purchase price allocation as of March 31, 2019 : March 31, 2019 (in millions) Accounts receivable $ 23.7 Inventories 12.5 Property, plant, and equipment 83.4 Depletable land 137.1 Goodwill 112.5 Other assets 5.5 Accounts payable (10.2 ) Accrued and other liabilities (14.3 ) Finance lease liability (5.3 ) Deferred income taxes (35.8 ) Total net assets acquired $ 309.1 Divestitures There was no divestiture activity for the three months ended March 31, 2019 and 2018 .

Fair Value Accounting Fair Valu

Fair Value Accounting Fair Value Accounting	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Accounting Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurement as of March 31, 2019 Level 1 Level 2 Level 3 Total (in millions) Assets: Cash equivalents $ 60.0 $ — $ — $ 60.0 Total assets $ 60.0 $ — $ — $ 60.0 Liabilities: Interest rate hedge (1) $ — $ 2.4 $ — $ 2.4 Total liabilities $ — $ 2.4 $ — $ 2.4 Fair Value Measurement as of December 31, 2018 Level 1 Level 2 Level 3 Total (in millions) Assets: Cash equivalents $ 30.0 $ — $ — $ 30.0 Total assets $ 30.0 $ — $ — $ 30.0 Liabilities: Interest rate hedge (1) $ — $ 1.2 $ — $ 1.2 Total liabilities $ — $ 1.2 $ — $ 1.2 (1) Included in other liabilities on the Consolidated Balance Sheets. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for that asset or liability in an orderly transaction between market participants on the measurement date. An entity is required to establish a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair values are listed below: Level 1 – This level is defined as quoted prices in active markets for identical assets or liabilities. The Company’s cash equivalents are instruments of the U.S. Treasury or highly-rated money market mutual funds. Level 2 – This level is defined as observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Interest rate hedges are valued at exit prices obtained from each counterparty. See Note 7 Debt. Level 3 – This level is defined as unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information The Company reports operating results in three principal business segments: Construction Products. The Construction Products segment produces and sells construction aggregates including natural aggregates and specialty materials and manufactures and sells construction site support equipment including trench shields and shoring products and services for infrastructure-related projects. Energy Equipment. The Energy Equipment segment manufactures and sells products for energy-related businesses, including structural wind towers, steel utility structures for electricity transmission and distribution, and storage and distribution tanks. Transportation Products. The Transportation Products segment manufactures and sells products for the inland waterway including barges and barge-related products and steel components for railcars and other transportation and industrial equipment. The financial information for these segments is shown in the tables below. We operate principally in North America. Three Months Ended March 31, Revenues Operating Profit (Loss) 2019 2018 2019 2018 (in millions) Construction aggregates $ 88.4 $ 52.6 Other 17.6 17.6 Construction Products Group 106.0 70.2 $ 11.3 $ 12.4 Wind towers and utility structures 158.6 147.5 Other 50.5 48.8 Energy Equipment Group 209.1 196.3 28.2 17.5 Inland barges 49.4 30.8 Steel components 48.1 58.5 Transportation Products Group 97.5 89.3 8.3 9.0 All Other — — — — Segment Totals before Eliminations and Corporate 412.6 355.8 47.8 38.9 Corporate — — (10.5 ) (7.7 ) Eliminations (1.7 ) (1.4 ) — — Consolidated and Combined Total $ 410.9 $ 354.4 $ 37.3 $ 31.2

Property, Plant, and Equipment

Property, Plant, and Equipment	3 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, Plant, and Equipment The following table summarizes the components of property, plant, and equipment as of March 31, 2019 and December 31, 2018 . March 31, December 31, (in millions) Land (1) $ 316.6 $ 316.5 Buildings and improvements 271.0 267.5 Machinery and other 726.8 715.9 Construction in progress 31.4 28.8 1,345.8 1,328.7 Less accumulated depreciation (543.9 ) (525.7 ) $ 801.9 $ 803.0 (1) Includes depletable land of $202.0 million as of March 31, 2019 and $201.9 million as of December 31, 2018 .

Goodwill

Goodwill	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill by segment is as follows: March 31, December 31, (in millions) Construction Products Group $ 172.8 $ 171.7 Energy Equipment Group 416.9 416.9 Transportation Products Group 26.6 26.6 $ 616.3 $ 615.2 The increase in the Construction Products Group goodwill during the three months ended March 31, 2019 is due to a refinement of the purchase price allocation for ACG. See Note 2 Acquisitions and Divestitures.

Debt

Debt	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Debt	Debt The following table summarizes the components of debt as of March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, (in millions) Revolving credit facility $ 100.0 $ 180.0 Finance leases 5.1 5.5 Total debt $ 105.1 $ 185.5 On November 1, 2018, the Company entered into a $400.0 million unsecured revolving credit facility that matures in November 2023 . The interest rates under the facility are variable based on LIBOR or an alternate base rate plus a margin that is determined based on Arcosa’s leverage as measured by a consolidated total indebtedness to consolidated EBITDA ratio, which is currently set at LIBOR plus 1.25% . A commitment fee accrues on the average daily unused portion of the revolving credit facility at the current rate of 0.20% . As of March 31, 2019 , we had $100.0 million of outstanding loans borrowed and $47.5 million of letters of credit issued under the facility, leaving $252.5 million available. Of the outstanding letters of credit as of March 31, 2019 , $46.9 million are expected to expire in 2019 , with the remainder in 2020 . The majority of our letter of credit obligations support the Company’s various insurance programs and warranty claims and generally renew by their terms each year. The Company's revolving credit facility requires the maintenance of certain ratios related to leverage and interest coverage. As of March 31, 2019 , we were in compliance with all such financial covenants. Borrowings under the credit facility are guaranteed by certain wholly-owned subsidiaries of the Company. The carrying value of borrowings under our revolving credit facility approximates fair value because the interest rate adjusts to the market interest rate (Level 3 input). See Note 3 Fair Value Accounting. As of March 31, 2019 , the Company had $1.3 million of unamortized debt issuance costs related to the revolving credit facility, which are included in other assets on the Consolidated Balance Sheet. The remaining principal payments under existing debt agreements as of March 31, 2019 are as follows: 2019 2020 2021 2022 2023 Thereafter (in millions) Revolving credit facility $ — $ — $ — $ — $ 100.0 $ — Interest rate hedges In December 2018, the Company entered into an interest rate swap instrument, effective as of January 2, 2019 and expiring in 2023, to reduce the effect of changes in the variable interest rates associated with borrowings under the revolving credit facility. The instrument carried an initial notional amount of $100.0 million , thereby hedging the first $100.0 million of borrowings under the credit facility. The instrument effectively fixes the LIBOR component of the credit facility borrowings at 2.71% . As of March 31, 2019 , the Company has recorded a liability of $2.4 million for the fair value of the instrument, all of which is recorded in accumulated other comprehensive loss. See Note 3 Fair Value Accounting.

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Leases We have various leases primarily for office space and certain equipment. At inception, we determine if an arrangement contains a lease and whether that lease meets the classification criteria of a finance or operating lease. For leases that contain options to purchase, terminate, or extend, such options are included in the lease term when it is reasonably certain that the option will be exercised. Some of the Company's lease arrangements contain lease components and non-lease components which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on information available at commencement date in determining the present value of lease payments. Operating Leases The following table presents information about the amount, timing, and uncertainty of cash flows arising from the Company's operating leases as of March 31, 2019 . March 31, 2019 (in millions) Maturity of Lease Liabilities 2019 (remaining) $ 5.4 2020 5.8 2021 3.4 2022 2.3 2023 1.8 Thereafter 7.6 Total undiscounted operating lease payments 26.3 Less imputed interest (3.7 ) Present value of operating lease liabilities $ 22.6 Balance Sheet Classification Other assets $ 19.6 Accrued liabilities $ 6.2 Other liabilities 16.4 Total operating lease liabilities $ 22.6 Other Information Weighted average remaining lease term 5.8 years Weighted average discount rate 4.8 % Operating lease costs were $2.0 million during the three months ended March 31, 2019 . Costs related to variable lease rates or leases with terms less than twelve months were not significant. Cash paid for amounts included in the measurement of operating lease liabilities was $2.0 million during the three months ended March 31, 2019 and is included in operating cash flows. There were no additional right-of-use assets recognized as non-cash asset additions that resulted from new operating lease liabilities during the three months ended March 31, 2019 . Finance Leases Finance leases are included in Property, Plant, and Equipment, net and Debt on the consolidated balance sheets. The associated amortization expense and interest expense are included in depreciation and interest expense, respectively, on the consolidated income statements. These leases are not material to the consolidated financial statements as of March 31, 2019 .

Other, Net

Other, Net	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Other, Net	Other, Net Other, net (income) expense consists of the following items: Three Months Ended 2019 2018 (in millions) Interest income $ (0.3 ) $ — Foreign currency exchange transactions 0.5 1.0 Other (0.4 ) — Other, net (income) expense $ (0.2 ) $ 1.0

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For interim income tax reporting, we estimate our annual effective tax rate and apply it to our year to date ordinary income (loss). Tax jurisdictions with a projected or year to date loss for which a tax benefit cannot be realized are excluded. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. We have open tax years from 2013 to 2018 with various significant tax jurisdictions. For the three months ended March 31, 2019 , the effective tax rate of 22.2% was higher than the U.S. federal statutory rate of 21.0% due primarily to state taxes partially offset by foreign tax benefits. For the three months ended March 31, 2018 , the effective tax rate of 26.5% was higher than the U.S. federal statutory tax rate of 21.0% due primarily to state taxes and changes made to valuation allowances.

Employee Retirement Plans

Employee Retirement Plans	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Employee Retirement Plans	Employee Retirement Plans Total employee retirement plan expense, which includes related administrative expenses, was $2.7 million and $2.5 million for the three months ended March 31, 2019 and 2018 , respectively. Prior to the Separation, these costs were funded through intercompany transactions with Trinity. The Company participates in a multiemployer defined benefit plan under the terms of a collective-bargaining agreement that covers certain union-represented employees. The Company contributed $0.5 million and $0.6 million to the multiemployer plan for the three months ended March 31, 2019 and 2018 , respectively. Total contributions to the multiemployer plan for 2019 are expected to be approximately $2.0 million . In connection with the acquisition of ACG in December 2018, the Company assumed the assets and liabilities related to a defined benefit pension plan. Employer contributions for 2019 are not expected to be significant.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss for the three months ended March 31, 2019 and 2018 are as follows: Currency translation adjustments Unrealized loss on derivative financial instruments Accumulated (in millions) Balances at December 31, 2017 $ (19.8 ) $ — $ (19.8 ) Other comprehensive income (loss), net of tax, before reclassifications 0.3 — 0.3 Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $0.0, $0.0, and $0.0 — — — Other comprehensive income (loss) 0.3 — 0.3 Balances at March 31, 2018 $ (19.5 ) $ — $ (19.5 ) Balances at December 31, 2018 $ (16.8 ) $ (0.9 ) $ (17.7 ) Other comprehensive income (loss), net of tax, before reclassifications 0.3 (1.0 ) (0.7 ) Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $0.0, $0.0 and $0.0 — 0.1 0.1 Other comprehensive income (loss) 0.3 (0.9 ) (0.6 ) Balances at March 31, 2019 $ (16.5 ) $ (1.8 ) $ (18.3 )

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation totaled approximately $3.4 million and $2.2 million for the three months ended March 31, 2019 and 2018 , respectively. For periods prior to the Separation, Arcosa's Combined Financial Statements reflect compensation expense for stock-based plans associated with the portion of the Former Parent's equity incentive plans in which Arcosa employees participated.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings Per Common Share Basic earnings per common share is computed by dividing net income remaining after allocation to unvested restricted shares, which includes unvested restricted shares of Arcosa stock held by employees of the Former Parent, by the weighted average number of basic common shares outstanding for the period. Except when the effect would be antidilutive, the calculation of diluted earnings per common share includes the weighted average net impact of nonparticipating unvested restricted shares. For periods prior to the Separation, the denominator for basic and diluted net income per share was calculated using the 48.8 million shares of common stock outstanding immediately following the Separation. Total weighted average restricted shares were 1.7 million for the three months ended March 31, 2019 . There were no weighted average restricted shares prior to the Separation. The computation of basic and diluted earnings per share follows. Three Months Ended Three Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 27.7 $ 22.2 Unvested restricted share participation (0.3 ) — Net income – basic 27.4 47.9 $ 0.57 22.2 48.8 $ 0.45 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.6 — — Net income – diluted $ 27.4 48.5 $ 0.56 $ 22.2 48.8 $ 0.45

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies The Company is involved in claims and lawsuits incidental to our business arising from various matters including commercial disputes, alleged product defect and/or warranty claims, intellectual property matters, personal injury claims, environmental issues, employment and/or workplace-related matters, and various governmental regulations. The Company evaluates its exposure to such claims and suits periodically and establishes accruals for these contingencies when a range of loss can be reasonably estimated. The range of reasonably possible losses for such matters, taking into consideration our rights in indemnity and recourse to third parties is $1.3 million to $11.3 million . At March 31, 2019 , total accruals of $5.0 million , including environmental matters described below, are included in accrued liabilities in the accompanying Consolidated Balance Sheet. The Company believes any additional liability would not be material to its financial position or results of operations. Arcosa is subject to remedial orders and federal, state, local, and foreign laws and regulations relating to the environment. The Company has reserved $1.1 million as of March 31, 2019 , included in our total accruals of $5.0 million discussed above, to cover our probable and estimable liabilities with respect to the investigations, assessments, and remedial responses to such matters, taking into account currently available information and our contractual rights to indemnification and recourse to third parties. However, estimates of liability arising from future proceedings, assessments, or remediation are inherently imprecise. Accordingly, there can be no assurance that we will not become involved in future litigation or other proceedings involving the environment or, if we are found to be responsible or liable in any such litigation or proceeding, that such costs would not be material to the Company.

Overview and Summary of Signifi

Overview and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation On November 1, 2018, Arcosa, Inc. and its consolidated subsidiaries (“Arcosa,” the “Company,” “we,” or “our”) became an independent publicly-traded company as a result of the distribution by Trinity Industries, Inc. (“Trinity” or “Former Parent”) of 100% of the outstanding shares of Arcosa, Inc. to Trinity’s stockholders (the “Separation”). Trinity stockholders received one share of Arcosa, Inc. common stock for every three shares of Trinity common stock held as of 5:00 p.m. local New York City time on October 17, 2018, the record date for the distribution. The transaction was structured to be tax-free to both Trinity and Arcosa stockholders for U.S. federal income tax purposes. The accompanying Consolidated and Combined Financial Statements present our historical financial position, results of operations, comprehensive income/loss, and cash flows in accordance with accounting principles generally accepted in the U.S. (“GAAP”). The combined financial statements for periods prior to the Separation were derived from Trinity’s consolidated financial statements and accounting records and prepared in accordance with GAAP for the preparation of carved-out combined financial statements. Through the date of the Separation, all revenues and costs as well as assets and liabilities directly associated with Arcosa have been included in the combined financial statements. Prior to the Separation, the combined financial statements also included allocations of certain selling, engineering, and administrative expenses provided by Trinity to Arcosa and allocations of related assets, liabilities, and the Former Parent’s net investment, as applicable. The allocations were determined on a reasonable basis; however, the amounts are not necessarily representative of the amounts that would have been reflected in the financial statements had the Company been an entity that operated independently of Trinity during the applicable periods. Following the Separation, the consolidated financial statements include the accounts of the Company and its subsidiaries and no longer include any allocations from Trinity. All normal and recurring adjustments necessary for a fair presentation of the financial position of the Company and the results of operations and cash flows have been made in conformity with GAAP. All significant intercompany accounts and transactions have been eliminated. Because of seasonal and other factors, the results of operations for the three months ended March 31, 2019 may not be indicative of expected results of operations for the year ending December 31, 2019 . These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with the audited consolidated and combined financial statements of the Company included in its Annual Report on Form 10-K for the year ended December 31, 2018 .
Relationship with Parent and Related Entities	Relationship with Former Parent and Related Entities Prior to the Separation, Arcosa was managed and operated in the normal course of business with other business units of Trinity. The accompanying combined financial results for periods prior to the Separation include sales and purchase transactions with Trinity and its subsidiaries in addition to certain shared costs which have been allocated to Arcosa and reflected as expenses in the Combined Statements of Operations. Transactions and allocations between Trinity and Arcosa are reflected in the Combined Statements of Cash Flows as a financing activity in Net transfers from/(to) Former Parent and affiliates. All transactions and allocations between Trinity and Arcosa prior to the Separation have been deemed paid between the parties, in cash, in the period in which the transaction or allocation was recorded in the Combined Financial Statements. Disbursements and cash receipts were made through centralized accounts payable and cash collection systems, respectively, which were operated by Trinity. As cash was disbursed and received by Trinity, it was accounted for by Arcosa through the Former Parent's net investment account. Allocations of current income taxes receivable or payable prior to the Separation were deemed to have been remitted to Arcosa or Trinity, respectively, in cash, in the period to which the receivable or payable applies. Corporate Costs/Allocations Prior to the Separation, the combined financial results include an allocation of costs related to certain corporate functions incurred by Trinity for services that were provided to or on behalf of Arcosa. Corporate costs have been allocated to Arcosa using methods management believes are consistent and reasonable. Such cost allocations to Arcosa consisted of (1) shared service charges and (2) corporate overhead costs. Shared service charges consisted of monthly charges to each Trinity business unit for certain corporate functions such as information technology, human resources, and legal based on usage rates and activity units. Corporate overhead costs consisted of costs not previously allocated to Trinity's business units and were allocated to Arcosa based on an analysis of each cost function and the relative benefits received by Arcosa for the period. Corporate overhead costs allocated to Arcosa prior to the Separation totaled $7.7 million for the three months ended March 31, 2018 . Corporate overhead costs are included in selling, engineering, and administrative expenses in the accompanying Consolidated and Combined Statements of Operations. Also see Note 4 Segment Information. The Combined Financial Statements of Arcosa may not include all of the actual expenses that would have been incurred had we operated as a standalone company during the periods presented and may not reflect our combined results of operations, financial position, and cash flows had we operated as a standalone company during the periods presented. Actual costs that would have been incurred if we had operated as a standalone company would depend on multiple factors, including organizational structure and strategic decisions made in various areas, including information technology and infrastructure. We also may incur additional costs associated with being a standalone, independent, publicly-traded company that were not included in the expense allocations and, therefore, would result in additional costs that are not reflected in our historical results of operations, financial position, and cash flows. Other Transactions with Trinity Businesses For the three months ended March 31, 2018 , the Company had sales to Trinity businesses of $43.5 million and purchases from Trinity businesses of $12.8 million .
Revenue Recognition	Revenue Recognition Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of principal activities from which the Company generates its revenue, separated by reportable segments. Payments for our products and services are generally due within normal commercial terms. For a further discussion regarding the Company’s reportable segments, see Note 4 Segment Information. Construction Products Group The Construction Products Group recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Energy Equipment Group Within the Energy Equipment Group, revenue is recognized for our wind tower and certain utility structure product lines over time as the products are manufactured using an input approach based on the costs incurred relative to the total estimated costs of production. We recognize revenue over time for these products as they are highly customized to the needs of an individual customer resulting in no alternative use to the Company if not purchased by the customer after the contract is executed, and we have the right to bill the customer for our work performed to date plus at least a reasonable profit margin for work performed. As of March 31, 2019 , we had a contract asset of $20.4 million related to these contracts, compared to $44.0 million at December 31, 2018 . For all other products, revenue is recognized when the customer has accepted the product and legal title of the product has passed to the customer. Transportation Products Group The Transportation Products Group recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of March 31, 2019 and the percentage of the outstanding performance obligations as of March 31, 2019 expected to be delivered during the remainder of 2019 : Unsatisfied performance obligations at March 31, 2019 Total Amount Percent expected to be delivered in 2019 (in millions) Energy Equipment Group: Wind towers and utility structures $ 549.2 58 % Other $ 53.0 95 % Transportation Products Group: Inland barges $ 383.9 67 % All unsatisfied performance obligations beyond 2019 are expected to be delivered during 2020.
Income Tax	Income Taxes Prior to the Separation, the Company’s operating results were included in the Former Parent’s various consolidated U.S. federal and state income tax returns, as well as non-U.S. tax filings. In the Company’s Combined Financial Statements for the periods prior to the Separation, income tax expense and deferred tax balances have been recorded as if the Company filed tax returns on a standalone basis separate from the Former Parent. The separate return method applies the accounting guidance for income taxes to the standalone financial statements as if the Company was a separate taxpayer and a standalone enterprise for the periods presented. The liability method is used to account for income taxes. Deferred income taxes represent the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Valuation allowances reduce deferred tax assets to an amount that will more likely than not be realized. The Company regularly evaluates the likelihood of realization of tax benefits derived from positions it has taken in various federal and state filings after consideration of all relevant facts, circumstances, and available information. For those tax positions that are deemed more likely than not to be sustained, the Company recognizes the benefit it believes is cumulatively greater than 50% likely to be realized. To the extent the Company were to prevail in matters for which accruals have been established or be required to pay amounts in excess of recorded reserves, the effective tax rate in a given financial statement period could be materially impacted.
Cash and Cash Equivalents	Financial Instruments The Company considers all highly liquid debt instruments to be cash and cash equivalents if purchased with a maturity of three months or less.
Concentration of Credit Risk	Financial instruments that potentially subject the Company to a concentration of credit risk are primarily cash investments and receivables. The Company currently places its cash investments primarily in bank deposits and highly-rated money market funds, and its investment policy limits the amount of credit exposure to any one commercial issuer. We seek to limit concentrations of credit risk with respect to receivables with control procedures that monitor the credit worthiness of customers, the large number of customers in the Company's customer base, and their dispersion across different industries and geographic areas. As receivables are generally unsecured, the Company maintains an allowance for doubtful accounts based upon the expected collectibility of all receivables. Receivable balances determined to be uncollectible are charged against the allowance. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values.
Derivative Instruments	Derivative Instruments The Company may, from time to time, use derivative instruments to mitigate the impact of changes in interest rates or changes in foreign currency exchange rates. For derivative instruments designated as hedges, the Company formally documents the relationship between the derivative instrument and the hedged item, as well as the risk management objective and strategy for the use of the derivative instrument. This documentation includes linking the derivative to specific assets or liabilities on the balance sheet, commitments, or forecasted transactions. At the time a derivative instrument is entered into, and at least quarterly thereafter, the Company assesses whether the derivative instrument is effective in offsetting the changes in fair value or cash flows of the hedged item. Any change in the fair value of the hedged instrument is recorded in accumulated other comprehensive loss (“AOCL”) as a separate component of stockholders' equity and reclassified into earnings in the period during which the hedged transaction affects earnings. The Company monitors its derivative positions and the credit ratings of its counterparties and does not anticipate losses due to counterparties' non-performance.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently adopted accounting pronouncements Effective as of January 1, 2018, the Company adopted Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers,” (“ASU 2014-09”) which provides common revenue recognition guidance for GAAP. Under ASU 2014-09, an entity recognizes revenue when it transfers promised goods or services to customers in an amount that reflects what it expects to receive in exchange for the goods or services. It also requires additional detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company applied ASU 2014-09 to all contracts that were not complete as of January 1, 2018 using the modified retrospective method of adoption, resulting in a reduction to Net Parent Investment of $4.0 million , net of tax, as of January 1, 2018 related to the cumulative effect of applying this standard. The primary impact of adopting the standard is a change in the timing of revenue recognition for our wind towers and certain utility structures product lines within our Energy Equipment Group. Previously, the Company recognized revenue when the product was delivered. Under ASU 2014-09, revenue is recognized over time as the products are manufactured. Revenue recognition policies in our other business segments remain substantially unchanged. Effective as of January 1, 2019, the Company adopted Accounting Standards Update No. 2016-02, “Leases”, (“ASU 2016-02”) which amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The Company elected to use the optional transition method that allows the Company to apply the provisions of the standard at the effective date without adjusting the comparative prior periods. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard which allowed us to carry forward the historical lease classification. The cumulative effect of adopting the standard on the opening balance of retained earnings was not significant. The primary impact of adopting the standard was the recognition of a right-of-use asset and corresponding lease liability for our operating leases included in other assets and other liabilities, respectively, on the Consolidated Balance Sheet. See Note 8 Leases for further discussion. The Company has implemented processes and a lease accounting system to ensure adequate internal controls were in place to assess our contracts and enable proper accounting and reporting of financial information upon adoption. Recently issued accounting pronouncements not yet adopted In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update No. 2016-13, “Financial Instruments - Credit Losses”, (“ASU 2016-13”) which amends the existing accounting guidance for recognizing credit losses on financial assets and certain other instruments not measured at fair value through net income, including financial assets measured at amortized cost, such as trade receivables and contract assets. ASU 2016-13 replaces the existing incurred loss impairment model with an expected credit loss model that requires consideration of a broader range of information to estimate expected credit losses over the lifetime of the asset. The new guidance is expected to result in earlier recognition of credit losses. ASU 2016-13 will become effective for public companies during interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. We are currently assessing the effects of the new standard, including its impact on our Consolidated Financial Statements.

Overview and Summary of Signi_2

Overview and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Unsatisfied Performance Obligations	Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of March 31, 2019 and the percentage of the outstanding performance obligations as of March 31, 2019 expected to be delivered during the remainder of 2019 : Unsatisfied performance obligations at March 31, 2019 Total Amount Percent expected to be delivered in 2019 (in millions) Energy Equipment Group: Wind towers and utility structures $ 549.2 58 % Other $ 53.0 95 % Transportation Products Group: Inland barges $ 383.9 67 % All unsatisfied performance obligations beyond 2019 are expected to be delivered during 2020.

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	3 Months Ended
	Mar. 31, 2019
ACG Materials
Business Acquisition [Line Items]
ACG preliminary purchase price allocation	The following table represents our preliminary purchase price allocation as of March 31, 2019 : March 31, 2019 (in millions) Accounts receivable $ 23.7 Inventories 12.5 Property, plant, and equipment 83.4 Depletable land 137.1 Goodwill 112.5 Other assets 5.5 Accounts payable (10.2 ) Accrued and other liabilities (14.3 ) Finance lease liability (5.3 ) Deferred income taxes (35.8 ) Total net assets acquired $ 309.1

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on recurring basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurement as of March 31, 2019 Level 1 Level 2 Level 3 Total (in millions) Assets: Cash equivalents $ 60.0 $ — $ — $ 60.0 Total assets $ 60.0 $ — $ — $ 60.0 Liabilities: Interest rate hedge (1) $ — $ 2.4 $ — $ 2.4 Total liabilities $ — $ 2.4 $ — $ 2.4 Fair Value Measurement as of December 31, 2018 Level 1 Level 2 Level 3 Total (in millions) Assets: Cash equivalents $ 30.0 $ — $ — $ 30.0 Total assets $ 30.0 $ — $ — $ 30.0 Liabilities: Interest rate hedge (1) $ — $ 1.2 $ — $ 1.2 Total liabilities $ — $ 1.2 $ — $ 1.2 (1) Included in other liabilities on the Consolidated Balance Sheets.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Financial information for segments	The financial information for these segments is shown in the tables below. We operate principally in North America. Three Months Ended March 31, Revenues Operating Profit (Loss) 2019 2018 2019 2018 (in millions) Construction aggregates $ 88.4 $ 52.6 Other 17.6 17.6 Construction Products Group 106.0 70.2 $ 11.3 $ 12.4 Wind towers and utility structures 158.6 147.5 Other 50.5 48.8 Energy Equipment Group 209.1 196.3 28.2 17.5 Inland barges 49.4 30.8 Steel components 48.1 58.5 Transportation Products Group 97.5 89.3 8.3 9.0 All Other — — — — Segment Totals before Eliminations and Corporate 412.6 355.8 47.8 38.9 Corporate — — (10.5 ) (7.7 ) Eliminations (1.7 ) (1.4 ) — — Consolidated and Combined Total $ 410.9 $ 354.4 $ 37.3 $ 31.2

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	3 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Components of property, plant, and equipment	The following table summarizes the components of property, plant, and equipment as of March 31, 2019 and December 31, 2018 . March 31, December 31, (in millions) Land (1) $ 316.6 $ 316.5 Buildings and improvements 271.0 267.5 Machinery and other 726.8 715.9 Construction in progress 31.4 28.8 1,345.8 1,328.7 Less accumulated depreciation (543.9 ) (525.7 ) $ 801.9 $ 803.0 (1) Includes depletable land of $202.0 million as of March 31, 2019 and $201.9 million as of December 31, 2018 .

Goodwill (Tables)

Goodwill (Tables)	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill by segment	Goodwill by segment is as follows: March 31, December 31, (in millions) Construction Products Group $ 172.8 $ 171.7 Energy Equipment Group 416.9 416.9 Transportation Products Group 26.6 26.6 $ 616.3 $ 615.2

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Components of debt	The following table summarizes the components of debt as of March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, (in millions) Revolving credit facility $ 100.0 $ 180.0 Finance leases 5.1 5.5 Total debt $ 105.1 $ 185.5
Remaining principal payments under debt agreement	The remaining principal payments under existing debt agreements as of March 31, 2019 are as follows: 2019 2020 2021 2022 2023 Thereafter (in millions) Revolving credit facility $ — $ — $ — $ — $ 100.0 $ —

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Operating leases	The following table presents information about the amount, timing, and uncertainty of cash flows arising from the Company's operating leases as of March 31, 2019 . March 31, 2019 (in millions) Maturity of Lease Liabilities 2019 (remaining) $ 5.4 2020 5.8 2021 3.4 2022 2.3 2023 1.8 Thereafter 7.6 Total undiscounted operating lease payments 26.3 Less imputed interest (3.7 ) Present value of operating lease liabilities $ 22.6 Balance Sheet Classification Other assets $ 19.6 Accrued liabilities $ 6.2 Other liabilities 16.4 Total operating lease liabilities $ 22.6 Other Information Weighted average remaining lease term 5.8 years Weighted average discount rate 4.8 %

Other, Net (Tables)

Other, Net (Tables)	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Other, net (income) expense	Other, net (income) expense consists of the following items: Three Months Ended 2019 2018 (in millions) Interest income $ (0.3 ) $ — Foreign currency exchange transactions 0.5 1.0 Other (0.4 ) — Other, net (income) expense $ (0.2 ) $ 1.0

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Changes in accumulated other comprehensive loss	Changes in accumulated other comprehensive loss for the three months ended March 31, 2019 and 2018 are as follows: Currency translation adjustments Unrealized loss on derivative financial instruments Accumulated (in millions) Balances at December 31, 2017 $ (19.8 ) $ — $ (19.8 ) Other comprehensive income (loss), net of tax, before reclassifications 0.3 — 0.3 Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $0.0, $0.0, and $0.0 — — — Other comprehensive income (loss) 0.3 — 0.3 Balances at March 31, 2018 $ (19.5 ) $ — $ (19.5 ) Balances at December 31, 2018 $ (16.8 ) $ (0.9 ) $ (17.7 ) Other comprehensive income (loss), net of tax, before reclassifications 0.3 (1.0 ) (0.7 ) Amounts reclassified from accumulated other comprehensive loss, net of tax benefit of $0.0, $0.0 and $0.0 — 0.1 0.1 Other comprehensive income (loss) 0.3 (0.9 ) (0.6 ) Balances at March 31, 2019 $ (16.5 ) $ (1.8 ) $ (18.3 )

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The computation of basic and diluted earnings per share follows. Three Months Ended Three Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 27.7 $ 22.2 Unvested restricted share participation (0.3 ) — Net income – basic 27.4 47.9 $ 0.57 22.2 48.8 $ 0.45 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.6 — — Net income – diluted $ 27.4 48.5 $ 0.56 $ 22.2 48.8 $ 0.45

Overview and Summary of Signi_3

Overview and Summary of Significant Accounting Policies - Relationship with Former Parent and Related Entities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Trinity Industries, Inc.
Related Party Transaction [Line Items]
Sales to Trinity businesses	$ 43.5
Purchases from Trinity businesses	12.8
Corporate Segment
Related Party Transaction [Line Items]
Corporate overhead costs	$ 7.7

Overview and Summary of Signi_4

Overview and Summary of Significant Accounting Policies - Stockholders' Equity (Details)	3 Months Ended
	Mar. 31, 2019USD ($)shares
Accounting Policies [Abstract]
Authorized stock repurchase amount	$ 50,000,000
Number of shares repurchased | shares	269,574
Cost of shares repurchased	$ 8,000,000
Remaining authorized repurchase amount	39,000,000
Cash amount of repurchased shares settling in subsequent month	$ 2,000,000

Overview and Summary of Signi_5

Overview and Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Contract asset with customer	$ 20.4	$ 44

Overview and Summary of Signi_6

Overview and Summary of Significant Accounting Policies - Unsatisfied Performance Obligation (Details) $ in Millions	Mar. 31, 2019USD ($)
Transportation Products Group | Inland barge
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations, Amount	$ 383.9
Unsatisfied performance obligations, Percent expected to be delivered in 2019	67.00%
Energy Equipment Group | Wind towers and utility structures
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations, Amount	$ 549.2
Unsatisfied performance obligations, Percent expected to be delivered in 2019	58.00%
Energy Equipment Group | Other
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations, Amount	$ 53
Unsatisfied performance obligations, Percent expected to be delivered in 2019	95.00%

Overview and Summary of Signi_7

Overview and Summary of Significant Accounting Policies - Recent Accounting Pronouncement (Details) $ in Millions	Jan. 01, 2018USD ($)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
ASU 2014-09 retained earnings decrease	$ 4

Acquisitions and Divestitures -

Acquisitions and Divestitures - ACG preliminary purchase price allocation (Details) - USD ($) $ in Millions	Mar. 31, 2019		Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 616.3	[1]	$ 615.2
Construction Products Group
Business Acquisition [Line Items]
Goodwill	172.8		$ 171.7
Construction Products Group | ACG Materials
Business Acquisition [Line Items]
Accounts receivable	23.7
Inventories	12.5
Property, plant, and equipment	83.4
Mineral reserves	137.1
Goodwill	112.5
Other assets	5.5
Accounts payable	(10.2)
Accrued and other liabilities	(14.3)
Capital lease obligations	(5.3)
Deferred income taxes	(35.8)
Total net assets acquired	$ 309.1
[1]	Unaudited

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019businesses_divested	Mar. 31, 2018USD ($)businesses_divested
Segment Reporting Information [Line Items]
Number of Businesses Acquired	0	1
Number of Divestitures | businesses_divested	0	0
Inland barge business | Transportation Products Group
Segment Reporting Information [Line Items]
Acquisition price		$ 25
Goodwill acquired		$ 9.5

Fair Value Accounting - Assets

Fair Value Accounting - Assets and liabilities measured at fair value on recurring basis (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Liabilities:
Derivative liability		$ 2.4
Fair Value, Measurements, Recurring
Assets:
Cash equivalents		60	$ 30
Total assets		60	30
Liabilities:
Total liabilities		2.4	1.2
Fair Value, Measurements, Recurring | Interest Rate Swap
Liabilities:
Derivative liability	[1]	2.4	1.2
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Assets:
Cash equivalents		60	30
Total assets		60	30
Liabilities:
Total liabilities		0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Interest Rate Swap
Liabilities:
Derivative liability	[1]	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Assets:
Cash equivalents		0	0
Total assets		0	0
Liabilities:
Total liabilities		2.4	1.2
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest Rate Swap
Liabilities:
Derivative liability	[1]	2.4	1.2
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Assets:
Cash equivalents		0	0
Total assets		0	0
Liabilities:
Total liabilities		0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Interest Rate Swap
Liabilities:
Derivative liability	[1]	$ 0	$ 0
[1]	Included in other liabilities on the Consolidated Balance Sheets.

Segment Information - Financial

Segment Information - Financial information for segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 410.9	$ 354.4
Operating profit (loss)	37.3	31.2
Intersegment | Eliminations
Segment Reporting Information [Line Items]
Revenues	(1.7)	(1.4)
Operating profit (loss)	0	0
Total
Segment Reporting Information [Line Items]
Revenues	412.6	355.8
Operating profit (loss)	47.8	38.9
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0
Operating profit (loss)	(10.5)	(7.7)
Construction Products Group | Total
Segment Reporting Information [Line Items]
Revenues	106	70.2
Operating profit (loss)	11.3	12.4
Energy Equipment Group | Total
Segment Reporting Information [Line Items]
Revenues	209.1	196.3
Operating profit (loss)	28.2	17.5
Transportation Products Group | Total
Segment Reporting Information [Line Items]
Revenues	97.5	89.3
Operating profit (loss)	8.3	9
All Other | Total
Segment Reporting Information [Line Items]
Revenues	0	0
Operating profit (loss)	0	0
Construction aggregates | Construction Products Group
Segment Reporting Information [Line Items]
Revenues	88.4	52.6
Other | Construction Products Group
Segment Reporting Information [Line Items]
Revenues	17.6	17.6
Other | Energy Equipment Group
Segment Reporting Information [Line Items]
Revenues	50.5	48.8
Wind towers and utility structures | Energy Equipment Group
Segment Reporting Information [Line Items]
Revenues	158.6	147.5
Inland barge | Transportation Products Group
Segment Reporting Information [Line Items]
Revenues	49.4	30.8
Steel components | Transportation Products Group
Segment Reporting Information [Line Items]
Revenues	$ 48.1	$ 58.5

Segment Information - Narrative

Segment Information - Narrative (Details)	3 Months Ended
	Mar. 31, 2019segment
Segment Reporting [Abstract]
Number of principal business segments of Company	3

Property, Plant, and Equipmen_2

Property, Plant, and Equipment - Components of property, plant, and equipment (Details) - USD ($) $ in Millions	Mar. 31, 2019		Dec. 31, 2018
Property Plant and Equipment [Line Items]
Depletable land	$ 202		$ 201.9
Components of property, plant, and equipment
Property, plant and equipment, at cost	1,345.8		1,328.7
Less accumulated depreciation	(543.9)		(525.7)
Property, plant, and equipment, net	801.9	[1]	803
Land(1)
Components of property, plant, and equipment
Property, plant and equipment, at cost	316.6		316.5
Buildings and improvements
Components of property, plant, and equipment
Property, plant and equipment, at cost	271		267.5
Machinery and other
Components of property, plant, and equipment
Property, plant and equipment, at cost	726.8		715.9
Construction in progress
Components of property, plant, and equipment
Property, plant and equipment, at cost	$ 31.4		$ 28.8
[1]	Unaudited

Goodwill - Goodwill by segment

Goodwill - Goodwill by segment (Details) - USD ($) $ in Millions	Mar. 31, 2019		Dec. 31, 2018
Goodwill [Line Items]
Goodwill	$ 616.3	[1]	$ 615.2
Construction Products Group
Goodwill [Line Items]
Goodwill	172.8		171.7
Energy Equipment Group
Goodwill [Line Items]
Goodwill	416.9		416.9
Transportation Products Group
Goodwill [Line Items]
Goodwill	$ 26.6		$ 26.6
[1]	Unaudited

Debt - Components of debt (Deta

Debt - Components of debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Financing leases	$ 5.1	$ 5.5
Total debt	105.1	185.5
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Revolving credit facility	$ 100	$ 180

Debt - Remaining principal paym

Debt - Remaining principal payments under debt agreement (Details) - Revolving Credit Facility - Line of Credit $ in Millions	Mar. 31, 2019USD ($)
Debt Instrument [Line Items]
2019	$ 0
2020	0
2021	0
2022	0
2023	100
Thereafter	$ 0

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Letters of credit outstanding expiring in current fiscal year	$ 46.9
Derivative liability	2.4
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400
Line of credit facility, commitment fee amount	0.20%
Borrowings under Revolving Credit Facility	$ 100	$ 180
Line of credit facility, remaining borrowing capacity	252.5
Unamortized debt issuance expense	1.3
Letter of Credit | Line of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 47.5
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
LIBOR variable rate spread	1.25%
Designated as Hedging Instrument | Interest Rate Swap
Debt Instrument [Line Items]
Derivative, notional amount	$ 100
Derivative, fixed interest rate	2.71%

Leases - Operating leases (Deta

Leases - Operating leases (Details) $ in Millions	Mar. 31, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019 (remaining)	$ 5.4
2020	5.8
2021	3.4
2022	2.3
2023	1.8
Thereafter	7.6
Total undiscounted operating lease payments	26.3
Less imputed interest	(3.7)
Present value of operating lease liabilities	22.6
Assets and Liabilities, Lessee [Abstract]
Present value of operating lease liabilities	$ 22.6
Weighted average remaining lease term	5 years 9 months
Weighted average discount rate, percent	4.80%
Other assets
Operating lease, right of use asset	$ 19.6
Accrued liabilities
Operating lease, current liability	6.2
Other liabilities
Operating lease, noncurrent liability	$ 16.4

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 2
Operating lease payments in the year	2
Additional right-of-use assets recognized as non-cash asset additions	$ 0

Other, Net - Summary of other,

Other, Net - Summary of other, net (income) expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other, net (income) expense
Interest income	$ (0.3)	$ 0
Foreign currency exchange transactions	0.5	1
Other	(0.4)	0
Other, net (income) expense	$ (0.2)	$ 1

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	22.20%	26.50%
Statutory rate	21.00%	21.00%

Employee Retirement Plans - Nar

Employee Retirement Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Retirement Benefits [Abstract]
Employee retirement plan expense	$ 2.7	$ 2.5
Contributions to multiemployer plan	0.5	$ 0.6
Expected full year contributions by the employer to the multiemployer plan	$ 2

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Changes in accumulated other comprehensive loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Currency translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	$ (16.8)	$ (19.8)
Other comprehensive income (loss), net of tax, before reclassifications	0.3	0.3
Reclassification from accumulated other comprehensive income, current period, net of tax	0	0
Reclassification from AOCI, current period, tax	0	0
Other comprehensive income (loss)	0.3	0.3
Equity ending balance	(16.5)	(19.5)
Unrealized loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	(0.9)	0
Other comprehensive income (loss), net of tax, before reclassifications	(1)	0
Reclassification from accumulated other comprehensive income, current period, net of tax	0.1	0
Reclassification from AOCI, current period, tax	0	0
Other comprehensive income (loss)	(0.9)	0
Equity ending balance	(1.8)	0
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	(17.7)	(19.8)
Other comprehensive income (loss), net of tax, before reclassifications	(0.7)	0.3
Reclassification from accumulated other comprehensive income, current period, net of tax	0.1	0
Reclassification from AOCI, current period, tax	0	0
Other comprehensive income (loss)	(0.6)	0.3
Equity ending balance	$ (18.3)	$ (19.5)

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation	$ 3.4	$ 2.2

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Oct. 31, 2018
Earnings Per Share [Abstract]
Entity common stock, shares outstanding				48.8
Total weighted average restricted shares and antidilutive stock options		1.7	0
Earnings Per Share Reconciliation [Abstract]
Net income		$ 27.7	$ 22.2
Unvested restricted share participation		(0.3)	0
Net income – basic		$ 27.4	$ 22.2
Net income - basic (shares)	[1]	47.9	48.8
Net income - basic (EPS)		$ 0.57	$ 0.45
Effect of dilutive securities:
Nonparticipating unvested restricted shares		$ 0	$ 0
Nonparticipating unvested restricted shares (shares)		0.6	0
Net income – diluted		$ 27.4	$ 22.2
Net income - diluted (shares)	[1]	48.5	48.8
Net income - diluted (EPS)		$ 0.56	$ 0.45
[1]	For periods prior to the Separation, the denominator for basic and diluted net income per common share was calculated using the 48.8 million shares of common stock outstanding immediately following the Separation.

Contingencies - Narrative (Deta

Contingencies - Narrative (Details) $ in Millions	Mar. 31, 2019USD ($)
Accrued liabilities
Loss Contingencies [Line Items]
Total accruals	$ 5
Environmental and workplace matters
Loss Contingencies [Line Items]
Total accruals	1.1
Minimum
Loss Contingencies [Line Items]
Range of possible loss	1.3
Maximum
Loss Contingencies [Line Items]
Range of possible loss	$ 11.3