Aleris 10-Q 5 Nov 19 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	9 Months Ended
	Sep. 30, 2019shares
Document And Entity Information [Abstract]
Entity Registrant Name	Aleris Corporation
Entity Central Index Key	0001518587
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	32,380,867
Entity Current Reporting Status	Yes

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 44.7	$ 108.6
Accounts receivable, net	395.8	308.8
Inventories	752.4	772.9
Prepaid expenses and other current assets	58	62.7
Total Current Assets	1,250.9	1,253
Property, plant and equipment, net	1,327.8	1,395
Intangible assets, net	31	32.5
Deferred income taxes	60.2	60.2
Other long-term assets	73.2	38.7
Total Assets	2,743.1	2,779.4
Current Liabilities
Accounts payable	302.8	374.8
Accrued liabilities	191.5	198.1
Current portion of long-term debt	72.5	21.9
Total Current Liabilities	566.8	594.8
Long-term debt	1,886.6	1,906.4
Deferred revenue	55	65
Deferred income taxes	8.7	0.9
Accrued pension benefits	155.5	163.7
Accrued postretirement benefits	29.1	29.6
Other long-term liabilities	71.6	46.1
Total Long-Term Liabilities	2,206.5	2,211.7
Stockholders’ Equity
Common stock; par value $.01; 45,000,000 shares authorized; 32,380,867 shares issued at September 30, 2019 and December 31, 2018	0.3	0.3
Preferred stock; par value $.01; 1,000,000 shares authorized; none issued	0	0
Additional paid-in capital	437.3	431.8
Retained deficit	(276.1)	(292.2)
Accumulated other comprehensive loss	(191.7)	(167)
Total Equity	(30.2)	(27.1)
Total Liabilities and Equity	$ 2,743.1	$ 2,779.4

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Stockholders’ Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	45,000,000	45,000,000
Common stock, shares issued (in shares)	32,380,867	32,380,867
Redeemable preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Redeemable preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Redeemable preferred stock, shares issued (in shares)	0	0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 856.8			$ 911.3			$ 2,650.5	$ 2,644.2
Cost of sales	744			845.6			2,349.1	2,414.6
Gross profit	112.8			65.7			301.4	229.6
Selling, general and administrative expenses	50.2			53.2			155.9	153.7
Restructuring charges	0.4			0.2			2	2
Gains on derivative financial instruments	(6.4)			(6.3)			(18.2)	(19)
Other operating expense, net	0.5			0.8			1.2	1.9
Operating income	68.1			17.8			160.5	91
Interest expense, net	39.1			37.5			118.9	106
Debt extinguishment costs	0			0			0	48.9
Other (income) expense, net	(0.9)			0.9			1.6	(10.2)
Income (loss) before income taxes	29.9			(20.6)			40	(53.7)
Provision for income taxes	5			5.4			23.9	14.7
Net income (loss)	24.9	$ 24.6	$ (33.4)	(26)	$ (46.9)	$ 4.6	16.1	(68.4)
Comprehensive income (loss)	$ 0.6			$ (35.1)			$ (8.6)	$ (87.6)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net income (loss)	$ 16.1	$ (68.4)
Adjustments to reconcile net income (loss) to net cash used by operating activities:
Depreciation and amortization	105.5	103.8
Provision for deferred income taxes	6.8	5
Stock-based compensation expense	5.5	2.8
Unrealized losses (gains) on derivative financial instruments	23.5	(3.2)
Amortization of debt issuance costs	6.8	3.6
Loss on extinguishment of debt	0	48.9
Non-cash gain	0	(11.1)
Other	2.7	5.1
Changes in operating assets and liabilities:
Change in accounts receivable	(96.6)	(146)
Change in inventories	4.9	(135.7)
Change in other assets	(22)	4.7
Change in accounts payable	(61.5)	76.9
Change in accrued and other liabilities	(18)	46.2
Net cash used by operating activities	(26.3)	(67.4)
Investing activities
Payments for property, plant and equipment	(73.6)	(76.3)
Other	(0.7)	(0.6)
Net cash used by investing activities	(74.3)	(76.9)
Financing activities
Proceeds from revolving credit facilities	158.4	220.3
Payments on revolving credit facilities	(101.2)	(284.4)
Proceeds from notes and term loans, net of discounts	0	1,483
Payments on term loan and notes, including premiums	(8.3)	(1,289.5)
Net payments on other long-term debt and finance leases	(10.6)	(8.6)
Debt issuance costs	0	(20.4)
Other	(0.1)	(0.2)
Net cash provided by financing activities	38.2	100.2
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(1.7)	(1.9)
Net decrease in cash, cash equivalents and restricted cash	(64.1)	(46)
Cash, cash equivalents and restricted cash at beginning of period	115.6	108
Cash, cash equivalents and restricted cash at end of period	51.5	62
Cash, cash equivalents and restricted cash	$ 115.6	$ 108

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss
Balance at January 1, 2019 at Dec. 31, 2017	$ 92.7	$ 0.3	$ 436.3	$ (203.4)	$ (140.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4.6			4.6
Other comprehensive income	20.5				20.5
Stock-based compensation activity	0.3		0.3
Balance at September 30, 2019 at Mar. 31, 2018	120.9	0.3	436.6	(196)	(120)
Balance at January 1, 2019 at Dec. 31, 2017	92.7	0.3	436.3	(203.4)	(140.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(68.4)
Balance at September 30, 2019 at Sep. 30, 2018	(0.8)	0.3	427.6	(269)	(159.7)
Balance at January 1, 2019 at Mar. 31, 2018	120.9	0.3	436.6	(196)	(120)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(46.9)			(46.9)	0
Other comprehensive income	(30.6)				(30.6)
Dividend	(11.3)		(11.3)
Stock-based compensation activity	0.3		0.3
Balance at September 30, 2019 at Jun. 30, 2018	32.4	0.3	425.6	(242.9)	(150.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(26)			(26)	0
Other comprehensive income	(9.1)				(9.1)
Stock-based compensation activity	2		2
Other	(0.1)			(0.1)
Balance at September 30, 2019 at Sep. 30, 2018	(0.8)	0.3	427.6	(269)	(159.7)
Balance at January 1, 2019 at Dec. 31, 2018	(27.1)	0.3	431.8	(292.2)	(167)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(33.4)			(33.4)
Other comprehensive income	(2.7)				(2.7)
Balance at September 30, 2019 at Mar. 31, 2019	(63.2)	0.3	431.8	(325.6)	(169.7)
Balance at January 1, 2019 at Dec. 31, 2018	(27.1)	0.3	431.8	(292.2)	(167)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16.1
Balance at September 30, 2019 at Sep. 30, 2019	(30.2)	0.3	437.3	(276.1)	(191.7)
Balance at January 1, 2019 at Mar. 31, 2019	(63.2)	0.3	431.8	(325.6)	(169.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24.6			24.6
Other comprehensive income	2.3				2.3
Stock-based compensation activity	2.5		2.5
Balance at September 30, 2019 at Jun. 30, 2019	(33.8)	0.3	434.3	(301)	(167.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24.9			24.9
Other comprehensive income	(24.3)				(24.3)
Stock-based compensation activity	3		3
Balance at September 30, 2019 at Sep. 30, 2019	$ (30.2)	$ 0.3	$ 437.3	$ (276.1)	$ (191.7)

Basis of Presentation and Recen

Basis of Presentation and Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Recent Accounting Pronouncements	BASIS OF PRESENTATION AND RECENT ACCOUNTING PRONOUNCEMENTS Basis of Presentation The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The operating results for interim periods contained herein are not necessarily indicative of the results that may be expected for any other interim period or for the full year. The accompanying Consolidated Financial Statements include the accounts of Aleris Corporation and all of its subsidiaries (collectively, except where the context otherwise requires, referred to as “Aleris,” “we,” “us,” “our,” “Company” or similar terms). Aleris Corporation is a holding company and currently conducts its business and operations through its direct wholly owned subsidiary, Aleris International, Inc. and its consolidated subsidiaries. Aleris International, Inc. is referred to herein as “Aleris International.” Recent Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes the impairment model for most financial instruments. Current guidance requires the recognition of credit losses based on an incurred loss impairment methodology that reflects losses once the losses are probable. Under ASU 2016-13, we will be required to use a current expected credit loss model (CECL) that will immediately recognize an estimate of credit losses that are expected to occur over the life of the financial instruments that are in the scope of this update, including trade receivables. The CECL model uses a broader range of reasonable and supportable information in the development of credit loss estimates than our current model. This guidance becomes effective for us on January 1, 2020, including the interim periods in the year. We are currently evaluating the impact that the adoption of this ASU will have on the consolidated financial statements and related disclosures In February 2016, the FASB issued ASU No. 2016-02, “Leases” (“ASU 2016-02”). This guidance requires lessees to put most leases on their balance sheets but recognize expense on the income statement in a manner similar to the previous guidance. We adopted ASU 2016-02 on January 1, 2019 using a modified retrospective approach, applying the standard’s transition provisions at the beginning of the period of adoption. ASU 2016-02 provided for certain practical expedients when adopting the guidance. We elected the package of practical expedients allowing us to not reassess (i) whether any expired or existing contracts are, or contain, leases, (ii) the lease classification for any expired or existing leases or (iii) initial direct costs for any expired or existing leases. Upon adoption, we recorded operating lease right-of-use assets of $10.8 , representing the present value of future lease payments under operating leases with terms of greater than twelve months. We also recorded corresponding operating lease liabilities of $11.5 . In addition, the prior capital lease balances of $10.4 , $4.0 and $6.2 previously reported in fixed assets, current maturities of long-term debt and long-term debt, respectively, were reclassified into separately classified right-of-use asset and lease obligation accounts. The adoption had no impact on reported net income or loss or retained deficit. See Note 13, “Leases” for additional information.

Revenue From Contracts with Cus

Revenue From Contracts with Customers	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS We generate substantially all of our revenue from the manufacture and shipment of aluminum products to our customers. Sales, value add and other taxes we collect concurrent with revenue-producing activities are excluded from revenue. Revenue is recognized when obligations under the terms of a contract (as defined by Accounting Standards Codification (“ASC”) 606) with our customer are satisfied, which occurs at a point in time when control of the product transfers to the customer. Control may transfer to the customer at various points in the delivery process. In North America, most revenue is recognized at the point of shipment. In Europe and China, the timing of revenue recognition varies depending on individual customer arrangements, and may include point of shipment, delivery to port, final delivery to customer or another point in the delivery process. Certain contractual arrangements, primarily with customers in our automotive and heat exchanger end-uses, allow for inventory to be held at a customer’s location or in a third-party warehouse with direct customer access. Title does not transfer to the customer on such inventory until the customer has removed the product for consumption. Under such arrangements, management has concluded that control has passed to the customer upon delivery to the customer’s location or the third-party warehouse if the customer has unrestricted access to the product and the Company has the right to invoice that customer after a specified period of time regardless of whether or not the product has been removed by the customer for production. The transaction price for our products includes the value of the aluminum in the product plus a conversion fee, or rolling margin, which is the price charged to the customer for conversion of the aluminum raw material to the finished product. Certain customer contracts include volume rebates applied retrospectively to quantities purchased during a specified period. The resulting variable consideration from volume rebates is estimated using the expected value method. As all customer contracts (as defined by ASC 606) have an original expected duration of less than twelve months, we have applied the practical expedient to the disclosure of the aggregate amount of the transaction price allocated to remaining performance obligations. Customer payments are due shortly after completion of the performance obligation, on payment terms that are customary for the industry. As all customer payments are due in less than one year, we have not adjusted revenue for the effects of a significant financing component. The following table discloses the disaggregated revenue from our contracts with customers by major end-use: For the three months ended September 30, 2019 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 97.2 $ 38.5 $ (2.5 ) $ 133.2 Automotive 118.4 80.0 — (4.7 ) 193.7 Heat exchanger — 59.1 — — 59.1 Building and construction 203.9 22.8 — — 226.7 Truck trailer 57.1 5.2 — — 62.3 Distribution 73.9 13.0 8.6 — 95.5 Regional plate and sheet — 34.1 — — 34.1 Other 43.3 7.7 1.2 — 52.2 $ 496.6 $ 319.1 $ 48.3 $ (7.2 ) $ 856.8 For the three months ended September 30, 2018 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 73.2 $ 21.5 $ — $ 94.7 Automotive 77.8 97.5 — (4.9 ) 170.4 Heat exchanger — 69.7 — — 69.7 Building and construction 230.5 — — — 230.5 Truck trailer 52.5 — — — 52.5 Distribution 118.0 — 12.5 (0.4 ) 130.1 Regional plate and sheet — 94.2 — — 94.2 Other 53.6 14.2 1.5 (0.1 ) 69.2 $ 532.4 $ 348.8 $ 35.5 $ (5.4 ) $ 911.3 For the nine months ended September 30, 2019 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 274.5 $ 102.5 $ (3.1 ) $ 373.9 Automotive 358.8 256.0 — (12.7 ) 602.1 Heat exchanger — 171.8 — — 171.8 Building and construction 594.3 76.1 — — 670.4 Truck trailer 190.2 19.4 — — 209.6 Distribution 244.3 55.7 28.5 — 328.5 Regional plate and sheet — 117.3 — — 117.3 Other 139.7 32.9 4.3 — 176.9 $ 1,527.3 $ 1,003.7 $ 135.3 $ (15.8 ) $ 2,650.5 For the nine months ended September 30, 2018 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 216.0 $ 60.3 $ — $ 276.3 Automotive 136.6 305.9 — (20.7 ) 421.8 Heat exchanger — 208.1 — — 208.1 Building and construction 657.4 — — — 657.4 Truck trailer 149.0 — — — 149.0 Distribution 369.9 — 46.1 (0.8 ) 415.2 Regional plate and sheet — 312.5 — — 312.5 Other 159.0 42.2 3.0 (0.3 ) 203.9 $ 1,471.9 $ 1,084.7 $ 109.4 $ (21.8 ) $ 2,644.2 We occasionally receive advance payments to secure product to be delivered in future periods. These advance payments are recorded as deferred revenue, and revenue is recognized as our performance obligations are satisfied throughout the term of the applicable contract. We may also purchase aluminum on our customer’s behalf, sell the unprocessed aluminum to our customer and then process and ship the material, charging a processing fee at the time of shipment. For these arrangements, a single performance obligation exists, and, as a result, amounts invoiced to our customers for the aluminum purchased on their behalf is recorded as deferred revenue until the aluminum is processed and shipped. The following table details the deferred revenue for which our performance obligations have not been satisfied: Total Deferred Revenue Deferred revenue at January 1, 2019 $ 81.9 (a) Payments received 8.0 Revenue recognized (20.2 ) Currency and other (0.1 ) Deferred revenue at September 30, 2019 $ 69.6 (a) (a) Deferred revenue is included in “Deferred revenue” and “Accrued liabilities” in the Consolidated Balance Sheet.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventories	INVENTORIES The components of our “Inventories” as of September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Raw materials $ 297.0 $ 283.8 Work in process 287.0 284.5 Finished goods 130.9 169.1 Supplies 37.5 35.5 Total inventories $ 752.4 $ 772.9

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT Our debt as of September 30, 2019 and December 31, 2018 is summarized as follows: September 30, 2019 December 31, 2018 ABL Facility $ 308.7 $ 253.7 First Lien Term Loan due 2023 ("Term Loan Facility"), net of discount and deferred issuance costs of $20.0 and $24.3 at September 30, 2019 and December 31, 2018, respectively 1,066.2 1,070.2 10.75% Senior Secured Junior Priority Notes due 2023 ("2023 Junior Priority Notes"), net of discount and deferred issuance costs of $6.2 and $7.5 at September 30, 2019 and December 31, 2018, respectively 393.8 392.5 Exchangeable Notes, net of discount of $0.1 and $0.2 at September 30, 2019 and December 31, 2018, respectively 44.7 44.6 Zhenjiang Term Loans, net of discount of $0.3 and $0.4 at September 30, 2019 and December 31, 2018, respectively 145.7 157.2 Other — 10.1 Total debt 1,959.1 1,928.3 Less: Current portion of long-term debt 72.5 21.9 Total long-term debt $ 1,886.6 $ 1,906.4 The Exchangeable Notes mature in June of 2020, and have been included in “Current portion of long-term debt” in the Consolidated Balance Sheet as of September 30, 2019 . Restricted cash At September 30, 2019 and December 31, 2018 , respectively, $6.8 and $7.0 of cash was restricted for payments of the Zhenjiang Term Loans, all of which was included in “Prepaid expenses and other current assets” in the Consolidated Balance Sheet.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Environmental Proceedings Our operations are subject to environmental laws and regulations governing air emissions, wastewater discharges, the handling, storage, disposal and remediation of hazardous substances and wastes and employee health and safety. These laws can impose joint and several liability for releases or threatened releases of hazardous substances upon statutorily defined parties, including us, regardless of fault or the lawfulness of the original activity or disposal. Given the changing nature of environmental legal requirements, we may be required, from time to time, to take environmental control measures at some of our facilities to meet future requirements. We have been named as a potentially responsible party in certain proceedings initiated pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act and similar state statutes and may be named a potentially responsible party in other similar proceedings in the future. It is not anticipated that the costs incurred in connection with the presently pending proceedings will, individually or in the aggregate, have a material adverse effect on our financial position, results of operations or cash flows. We are performing operations and maintenance at two Superfund sites for matters arising out of past waste disposal activity associated with closed facilities. We are also under orders to perform environmental remediation by agencies in four states and one non-U.S. country at seven sites. Our reserves for environmental remediation liabilities totaled $24.5 and $25.6 at September 30, 2019 and December 31, 2018 , respectively, and have been classified as “Other long-term liabilities” and “Accrued liabilities” in the Consolidated Balance Sheet. Of the environmental liabilities recorded at September 30, 2019 and December 31, 2018 , $11.0 and $11.9 , respectively, are subject to indemnification by third parties. In addition to environmental liabilities, we have recorded asset retirement obligations associated with legal requirements related to the retirement of certain assets. Our total asset retirement obligations were $6.7 and $6.8 at September 30, 2019 and December 31, 2018 , respectively. The amounts represent the most probable costs of remedial actions. We estimate the costs related to currently identified remedial actions will be paid out primarily over the next 10 years . Legal Proceedings We are party to routine litigation and proceedings as part of the ordinary course of business and do not believe that the outcome of any existing proceedings would have a material adverse effect on our financial position, results of operations or cash flows. We have established accruals for those loss contingencies, including litigation and environmental contingencies, for which it has been determined that a loss is probable; none of such loss contingencies is material. For those loss contingencies, including litigation and environmental contingencies, which have been determined to be reasonably possible, an estimate of the possible loss or range of loss cannot be determined because the claims, amount claimed, facts or legal status are not sufficiently developed or advanced in order to make such a determination. While we cannot estimate the loss or range of loss at this time, we do not believe that the outcome of any of these existing proceedings would be material to our financial position, results of operations or cash flows.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity	STOCKHOLDERS ’ EQUITY The following table shows changes in the number of our issued and outstanding shares of common stock: For the nine months ended Issued and outstanding shares of common stock September 30, 2019 September 30, 2018 Balance at the beginning of the period 32,380,867 32,001,318 Issuance associated with vested restricted stock units — 225,371 Shares cancelled — (3,418 ) Balance at the end of the period 32,380,867 32,223,271

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	ACCUMULATED OTHER COMPREHENSIVE LOSS The following table summarizes the activity within accumulated other comprehensive loss for the nine months ended September 30, 2019 : Currency translation Pension and other postretirement Total Balance at January 1, 2019 $ (93.3 ) $ (73.7 ) $ (167.0 ) Current period currency translation adjustments (28.8 ) 1.3 (27.5 ) Amortization of net actuarial losses and prior service costs, net of tax — 2.8 2.8 Balance at September 30, 2019 $ (122.1 ) $ (69.6 ) $ (191.7 ) A summary of reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2019 is provided below: Description of reclassifications out of accumulated other comprehensive loss Amount reclassified Amortization of net actuarial losses and prior service costs (recorded in “Other (income) expense, net”) $ (3.3 ) Deferred tax benefit on pension and other postretirement liability adjustments 0.5 Losses reclassified into earnings, net of tax $ (2.8 )

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We report three operating segments based on the organizational structure that is used by our chief operating decision maker to evaluate performance, make decisions on resource allocation and for which discrete financial information is available. Our operating segments are North America, Europe and Asia Pacific. Measurement of Segment Income or Loss and Segment Assets The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies in the Consolidated Financial Statements for the year ended December 31, 2018 . Our measure of profitability for our operating segments is referred to as segment income. Segment income includes gross profits, segment specific realized gains and losses on derivative financial instruments, segment specific other income and expense, segment specific selling, general and administrative (“SG&A”) expense and an allocation of certain functional SG&A expenses. Segment income excludes provisions for and benefits from income taxes, restructuring items, interest, depreciation and amortization, unrealized and certain realized gains and losses on derivative financial instruments, corporate general and administrative costs, start-up costs, gains and losses on asset sales, currency exchange gains and losses on debt and certain other gains and losses. Intra-entity sales and transfers are recorded at market value. Consolidated cash, restricted cash, net capitalized debt costs, deferred tax assets and assets related to our headquarters offices are not allocated to the segments. Reportable Segment Information The following table shows our revenues and segment income for our reportable segments for the periods presented in our Consolidated Statements of Comprehensive Income (Loss) : Three months ended September 30, 2019 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 496.6 $ 311.9 $ 48.3 $ 856.8 Intra-entity revenues — 7.2 — $ (7.2 ) — Total revenues $ 496.6 $ 319.1 $ 48.3 $ (7.2 ) $ 856.8 Segment income $ 77.3 $ 37.6 $ 11.6 $ 126.5 Three months ended September 30, 2018 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 532.4 $ 343.8 $ 35.1 $ 911.3 Intra-entity revenues — 5.0 0.4 $ (5.4 ) — Total revenues $ 532.4 $ 348.8 $ 35.5 $ (5.4 ) $ 911.3 Segment income $ 52.4 $ 30.4 $ 7.0 $ 89.8 Nine months ended September 30, 2019 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 1,527.3 $ 987.9 $ 135.3 $ 2,650.5 Intra-entity revenues — 15.8 — $ (15.8 ) — Total revenues $ 1,527.3 $ 1,003.7 $ 135.3 $ (15.8 ) $ 2,650.5 Segment income $ 208.8 $ 107.3 $ 29.3 $ 345.4 Nine months ended September 30, 2018 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 1,471.9 $ 1,063.8 $ 108.5 $ 2,644.2 Intra-entity revenues — 20.9 0.9 $ (21.8 ) — Total revenues $ 1,471.9 $ 1,084.7 $ 109.4 $ (21.8 ) $ 2,644.2 Segment income $ 165.5 $ 101.0 $ 16.1 $ 282.6 The following table reconciles total segment income to “ Income (loss) before income taxes ” as reported in our Consolidated Statements of Comprehensive Income (Loss) : For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Total segment income $ 126.5 $ 89.8 $ 345.4 $ 282.6 Unallocated amounts: Depreciation and amortization (35.8 ) (35.0 ) (105.5 ) (103.8 ) Other corporate general and administrative expenses (15.2 ) (15.3 ) (47.0 ) (37.9 ) Restructuring charges (0.4 ) (0.2 ) (2.0 ) (2.0 ) Interest expense, net (39.1 ) (37.5 ) (118.9 ) (106.0 ) Unallocated (losses) gains on derivative financial instruments (4.6 ) (10.5 ) (23.6 ) 3.0 Unallocated currency exchange losses (0.9 ) (1.1 ) (0.9 ) (2.4 ) Start-up costs (0.9 ) (9.8 ) (6.8 ) (48.7 ) Loss on extinguishment of debt — — — (48.9 ) Other income (expense), net 0.3 (1.0 ) (0.7 ) 10.4 Income (loss) before income taxes $ 29.9 $ (20.6 ) $ 40.0 $ (53.7 ) The following table shows our reportable segment assets as of September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 Assets North America $ 1,480.9 $ 1,460.0 Europe 739.2 736.4 Asia Pacific 341.2 340.2 Unallocated assets 181.8 242.8 Total consolidated assets $ 2,743.1 $ 2,779.4

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION On June 1, 2010, the Board of Directors of Aleris Corporation approved the Aleris Corporation 2010 Equity Incentive Plan (as amended from time to time, the “2010 Equity Plan”). Stock options, restricted stock units and restricted shares have been granted under the 2010 Equity Plan to certain members of management of the Company and directors. All stock options granted have a life not to exceed ten years and generally vest over a period not to exceed four years. Shares of common stock are issued upon stock option exercises from available shares of common stock. The restricted stock units also vest over a period not to exceed four years. A portion of the stock options, as well as a portion of the restricted stock units, may vest upon a change in control event should the event occur prior to full vesting of these awards, depending on the amount of vesting that has already occurred at the time of the event in comparison to the change in our largest stockholders’ overall level of beneficial ownership that results from the event. During the nine months ended September 30, 2019 , no stock options or restricted stock units were granted. We recorded stock-based compensation expense of $3.0 and $5.5 for the three and nine months ended September 30, 2019 , respectively, and $2.1 and $2.8 for the three and nine months ended September 30, 2018 , respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The effective tax rates for the three and nine months ended September 30, 2019 and 2018 differed from the federal statutory rate applied to income and losses before income taxes primarily as a result of the mix of income, losses and tax rates between tax jurisdictions, valuation allowances and, for the nine months ended September 30, 2019 , the results of an examination by a non-U.S. taxing jurisdiction (discussed below). We have valuation allowances recorded to reduce certain deferred tax assets to amounts that are more likely than not to be realized. The valuation allowances relate to the potential inability to realize our deferred tax assets associated with amortization, net operating losses and interest expense carryforwards in the U.S. and net operating loss carryforwards in non-U.S. jurisdictions. We intend to maintain our valuation allowances until sufficient positive evidence exists (such as cumulative positive earnings and estimated future taxable income) to support their reversal. As of September 30, 2019 , we had $7.2 of unrecognized tax benefits. $6.3 of the gross unrecognized tax benefits, if recognized, would affect the annual effective tax rate. We recognize interest and penalties related to uncertain tax positions within “Provision for income taxes” in the Consolidated Statements of Comprehensive Income (Loss) . As of September 30, 2019 , we had approximately $2.2 of accrued interest related to uncertain tax positions. The 2009 through 2017 tax years remain open to examination. During the fourth quarter of 2013, a non-U.S. taxing jurisdiction commenced an examination of our tax returns for the tax years ended December 31, 2012, 2011, 2010 and 2009. During the third quarter of 2019, the non-U.S. taxing jurisdiction issued its final audit report which included certain significant adjustments to the Company’s transfer pricing tax position resulting in additional tax expense of $3.6 along with additional interest of $1.3 . Both amounts were expensed in the nine months ended September 30, 2019 . $15.7 of withholding tax associated with the audit was paid in the third quarter of 2019 and is expected to be refunded within two to six months of the quarter end. At September 30, 2019, $18.8 has been recorded within “Prepaid expenses and other current assets” and $11.1 has been recorded within “Accrued liabilities” on the consolidated balance sheet related to this audit. Payment of the liability is expected to occur in the fourth quarter of 2019 . During the third quarter of 2018, the same jurisdiction notified us regarding an examination of our tax returns for the tax years ended December 31, 2016, 2015, 2014 and 2013. During the third quarter of 2018, a non-U.S. taxing jurisdiction notified us regarding an examination of our tax returns for the tax years ended December 31, 2016, 2015, 2014 and 2013. This examination was completed in the second quarter with no change. During the first quarter of 2019, a non-U.S. taxing jurisdiction notified us regarding an examination of our tax returns for the tax years ended December 31, 2017 and 2016 that is anticipated to be completed within nine months of the reporting date.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS Defined Benefit Pension Plans The service cost component of net periodic benefit expense is included in “Operating income,” while all other components of net periodic benefit expense are included in “ Other (income) expense, net ” in the Consolidated Statements of Comprehensive Income (Loss) . The components of the net periodic benefit expense are as follows: U.S. pension benefits For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 1.1 $ 1.1 $ 3.2 $ 3.3 Interest cost 1.6 1.4 4.9 4.3 Amortization of net actuarial losses 0.6 0.5 1.9 1.4 Amortization of prior service cost 0.1 0.1 0.2 0.2 Expected return on plan assets (2.3 ) (2.6 ) (6.9 ) (7.7 ) Net periodic benefit expense $ 1.1 $ 0.5 $ 3.3 $ 1.5 Non U.S. pension benefits For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 0.6 $ 0.6 $ 1.7 $ 1.9 Interest cost 0.5 0.5 1.6 1.5 Amortization of net actuarial losses 0.6 0.7 1.8 2.1 Expected return on plan assets — — (0.1 ) — Net periodic benefit expense $ 1.7 $ 1.8 $ 5.0 $ 5.5 Other Postretirement Benefit Plans The service cost component of net postretirement benefit expense is included in “Operating income,” while all other components of net postretirement benefit expense are included in “ Other (income) expense, net ” in the Consolidated Statements of Comprehensive Income (Loss) . The components of net postretirement benefit expense are as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 0.1 $ 0.1 $ 0.2 $ 0.3 Interest cost 0.3 0.2 0.9 0.8 Amortization of net actuarial gains (0.3 ) (0.2 ) (0.8 ) (0.6 ) Amortization of prior service cost 0.1 0.1 0.2 0.2 Net postretirement benefit expense $ 0.2 $ 0.2 $ 0.5 $ 0.7

Derivative and Other Financial

Derivative and Other Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Other Financial Instruments	DERIVATIVE AND OTHER FINANCIAL INSTRUMENTS We use forward contracts, options and swaps, as well as contractual price escalators, to reduce the risks associated with our metal, natural gas and other supply requirements, as well as fuel costs and certain currency and interest rate exposures. Generally, we enter into master netting arrangements with our counterparties and offset net derivative positions with the same counterparties against amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral under those arrangements in our Consolidated Balance Sheet. For classification purposes, we record the net fair value of each type of derivative position that is expected to settle in less than one year with each counterparty as a net current asset or liability and each type of long-term position as a net long-term asset or liability. As of September 30, 2019 , no cash collateral was posted. As of December 31, 2018 , $0.2 of cash collateral was posted. The amounts shown in the table below represent the gross amounts of recognized assets and liabilities, the amounts offset in the Consolidated Balance Sheet and the net amounts of assets and liabilities presented therein. As of September 30, 2019 and December 31, 2018 , there were no amounts subject to an enforceable master netting arrangement or similar agreement that have not been offset in the Consolidated Balance Sheet. Fair Value of Derivatives as of September 30, 2019 December 31, 2018 Derivatives by Type Asset Liability Asset Liability Metal $ 20.1 $ (13.0 ) $ 52.3 $ (24.3 ) Energy — (1.0 ) 0.2 (1.6 ) Interest rate — — — (0.4 ) Currency 0.2 (7.4 ) 0.4 (4.5 ) Total 20.3 (21.4 ) 52.9 (30.8 ) Effect of counterparty netting (11.8 ) 11.8 (23.5 ) 23.5 Effect of cash collateral — — — 0.2 Net derivatives as classified in the balance sheet $ 8.5 $ (9.6 ) $ 29.4 $ (7.1 ) The fair value of our derivative financial instruments at September 30, 2019 and December 31, 2018 are recorded in the Consolidated Balance Sheet as follows: Asset Derivatives Balance Sheet Location September 30, 2019 December 31, 2018 Metal Prepaid expenses and other current assets $ 8.5 $ 29.3 Energy Prepaid expenses and other current assets — 0.1 Total $ 8.5 $ 29.4 Liability Derivatives Balance Sheet Location September 30, 2019 December 31, 2018 Metal Accrued liabilities $ 0.6 $ — Other long-term liabilities 0.8 1.2 Energy Accrued liabilities 0.9 1.4 Other long-term liabilities 0.1 — Interest Rate Accrued liabilities — 0.4 Currency Accrued liabilities 5.3 3.0 Other long-term liabilities 1.9 1.1 Total $ 9.6 $ 7.1 With the exception of the interest rate derivative financial instruments (for which, realized gains are included within “Interest expense, net” in the Consolidated Statements of Operations), both realized and unrealized gains and losses on derivative financial instruments are included within “ Gains on derivative financial instruments ” in the Consolidated Statements of Comprehensive Income (Loss) . Realized (gains) and losses on derivative financial instruments totaled the following: For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Metal $ (13.0 ) $ (17.2 ) $ (46.1 ) $ (15.2 ) Energy 0.6 (0.1 ) 0.8 (0.4 ) Currency 1.4 0.5 3.6 (0.3 ) Interest Rate — — 0.5 — Metal Hedging The selling prices of the majority of the orders for our products are established at the time of order entry or, for certain customers, under long-term contracts. As the related raw materials used to produce these orders can be purchased several months or years after the selling prices are fixed, margins are subject to the risk of changes in the purchase price of the raw materials used for these fixed price sales. In order to manage this transactional exposure, future, swaps or forward purchase contracts are purchased at the time the selling prices are fixed. As metal is purchased to fill these fixed price sales orders, future, swaps or forward contracts are then sold. We also maintain a significant amount of inventory on-hand to meet anticipated and unpriced future sales. In order to preserve the value of this inventory, future or forward contracts are sold at the time inventory is purchased. As sales orders are priced, future or forward contracts are purchased. These derivatives generally settle within three months. We can also use call option contracts, which function in a manner similar to the natural gas call option contracts discussed below, and put option contracts for managing metal price exposures. Option contracts require the payment of a premium which is recorded as a realized loss upon settlement or expiration of the option contract. Upon settlement of a put option contract, we receive cash and recognize a related gain if the closing price is less than the strike price of the put option. If the put option strike price is less than the closing price, no amount is paid and the option expires. As of September 30, 2019 we had 147.1 thousand metric tons and 301.5 thousand metric tons of metal buy and metal sell derivative contracts, respectively. As of December 31, 2018 , we had 165.0 thousand metric tons and 293.0 thousand metric tons of metal buy and metal sell derivative contracts, respectively. Energy Hedging To manage our price exposure for natural gas purchases, we fix the future price of a portion of our natural gas requirements by entering into financial hedge agreements. Under these agreements, payments are made or received based on the differential between the monthly closing price on the New York Mercantile Exchange (“NYMEX”) and the contractual hedge price. We can also use a combination of call option contracts and put option contracts for managing the exposure to increasing natural gas prices while maintaining our ability to benefit from declining prices. Upon settlement of call option contracts, we receive cash and recognize a related gain if the NYMEX closing price exceeds the strike price of the call option. If the call option strike price exceeds the NYMEX closing price, no amount is received and the option expires unexercised. Upon settlement of a put option contract, we pay cash and recognize a related loss if the NYMEX closing price is lower than the strike price of the put option. If the put option strike price is less than the NYMEX closing price, no amount is paid and the option expires unexercised. Option contracts require the payment of a premium which is recorded as a realized loss upon settlement or expiration of the option contract. Natural gas cost can also be managed through the use of cost escalators included in some of our long-term supply contracts with customers, which limits exposure to natural gas price risk. As of September 30, 2019 and December 31, 2018 , we had 3.7 trillion and 4.6 trillion of British thermal unit forward buy contracts, respectively. We use independent freight carriers to deliver our products. As part of the total freight charge, these carriers include a per mile diesel surcharge based on the Department of Energy, Energy Information Administration’s (“DOE”) Weekly Retail Automotive Diesel National Average Price. From time to time we may enter into over-the-counter DOE diesel fuel swaps with financial counterparties to mitigate the impact of the volatility of diesel fuel prices on our freight costs. Under these swap agreements, we pay a fixed price per gallon of diesel fuel determined at the time the agreements were executed and receive a floating rate payment that is determined on a monthly basis based on the average price of the DOE Diesel Fuel Index during the applicable month. The swaps are designed to offset increases or decreases in fuel surcharges that we pay to our carriers. All swaps are financially settled. There is no possibility of physical settlement. As of September 30, 2019 and December 31, 2018 , we had 2.6 million gallons and 4.3 million gallons of diesel fuel swap contracts, respectively. Interest Rate Risk We are exposed to variable interest rate risk on the Term Loan Facility. We entered into interest rate swaps to fix the LIBOR interest rate on $700.0 of the Term Loan Facility for the period of October 31, 2018 through June 28, 2019. As of September 30, 2019 , we had no interest rate swaps outstanding. Currency Hedging Our aerospace and heat exchanger businesses expose the operating results of our European and Asia Pacific operations to fluctuations in the euro and renminbi as the sales contracts are generally in U.S. dollars while the costs of production are in the local currency. In order to mitigate the risk that fluctuations in currencies may have on our business, we have entered into forward currency contracts. As of September 30, 2019 and December 31, 2018 , we had euro forward contracts covering a notional amount of €67.1 million and €77.6 million , respectively. Credit Risk We are exposed to losses in the event of non-performance by the counterparties to the derivative financial instruments discussed above; however, we do not anticipate any non-performance by the counterparties. The counterparties are evaluated for creditworthiness and risk assessment prior to initiating trading activities with the brokers and periodically throughout each year while actively trading. Recurring Fair Value Measurements Derivative contracts are recorded at fair value using quoted market prices and significant other observable inputs. Fair value is defined by ASC 820, “Fair Value Measurements and Disclosures,” as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are described below: Level 1—Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2—Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3—Inputs that are both significant to the fair value measurement and unobservable. We endeavor to use the best available information in measuring fair value. Where appropriate, valuations are adjusted for various factors such as liquidity, bid/offer spreads, and credit considerations. Such adjustments are generally based on available market evidence and unobservable inputs. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. As of September 30, 2019 and December 31, 2018 , all of our derivative assets and liabilities represent Level 2 fair value measurements. Other Financial Instruments The carrying amount, fair values and level in the fair value hierarchy of our other financial instruments at September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Carrying Amount Fair Value Level in the Fair Value Hierarchy Carrying Amount Fair Value Level in the Fair Value Hierarchy Cash and cash equivalents $ 44.7 $ 44.7 Level 1 $ 108.6 $ 108.6 Level 1 Restricted cash 6.8 6.8 Level 1 7.0 7.0 Level 1 ABL Facility 308.7 308.7 Level 2 253.7 253.7 Level 2 Term Loan Facility 1,066.2 1,088.3 Level 1 1,070.2 1,088.2 Level 1 2023 Junior Priority Notes 393.8 422.5 Level 1 392.5 410.1 Level 1 Exchangeable Notes 44.7 60.7 Level 3 44.6 60.7 Level 3 Zhenjiang Term Loans 145.7 146.1 Level 3 157.2 157.6 Level 3 The principal amount of the ABL Facility approximates fair value because the interest rate paid is variable and there have been no significant changes in the credit risk of Aleris International subsequent to the borrowings. The fair values of the Term Loan Facility and the 2023 Junior Priority Notes were estimated using market quotations. The fair value of Aleris International’s Exchangeable Notes was estimated using a binomial lattice pricing model based on the fair value of our common stock, a risk-free interest rate of 1.9% and 2.6% as of September 30, 2019 and December 31, 2018 , respectively, and expected equity volatility of 65% and 60% as of September 30, 2019 and December 31, 2018 , respectively. Expected equity volatility was determined based on historical stock prices and implied and stated volatilities of our peer companies. The principal amount of the Zhenjiang Term Loans approximates fair value because the interest rate paid is variable, is set for periods of six months or less and there have been no significant changes in the credit risk of Aleris Zhenjiang subsequent to the inception of the Zhenjiang Term Loans.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	LEASES We have leases for office space, warehousing, vehicles, mobile equipment and certain other equipment in our production facilities. Certain of these lease agreements provide rights to extend or terminate the contract which have been evaluated in estimating the lease term. Most of our lease contracts do not provide a readily determinable implicit rate. For these contracts, our estimated incremental borrowing rate is based on information available at the inception of the lease. Leases with an initial term of twelve months or less are not recorded on the Consolidated Balance Sheet. Lease expense for these leases is recognized on a straight-line basis over the term of the lease. The components of lease expense were as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Operating lease expense $ 1.2 $ 3.6 Finance lease expense Amortization of right-of-use assets $ 1.4 $ 3.7 Interest on lease liabilities 0.3 0.7 Total finance lease expense $ 1.7 $ 4.4 Short term lease expense $ 0.5 $ 1.5 Supplemental cash flow information related to leases was as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Cash paid for amounts included in the measurement of liabilities: Operating cash flows from operating leases $ (1.2 ) $ (3.7 ) Operating cash flows from finance leases (0.3 ) (0.7 ) Financing cash flows from finance leases (1.2 ) (3.6 ) Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 0.1 $ 3.1 Finance leases 1.0 18.3 Supplemental balance sheet information related to leases was as follows: September 30, 2019 Operating leases Operating lease right-of-use assets (a) $ 10.5 Current operating lease liabilities (a) $ 4.1 Long-term operating lease liabilities (a) 7.0 Total operating lease liabilities $ 11.1 Finance leases Finance lease right-of-use asset, gross $ 33.0 Finance lease right-of-use asset, accumulated amortization (9.4 ) Finance lease right-of-use asset, net (a) $ 23.6 Current finance lease liabilities (a) $ 4.4 Long-term finance lease liabilities (a) 19.4 Total finance lease liabilities $ 23.8 Weighted average remaining lease term Operating leases 3.3 years Finance leases 10.1 years Weighted average discount rate Operating leases 5.8 % Finance leases 6.0 % (a) Operating and finance lease right-of-use assets are included in “Other long-term assets” in the Consolidated Balance Sheet. Current operating and finance lease obligations are included in “Accrued liabilities” in the Consolidated Balance Sheet. Long-term operating and finance lease obligations are included in “Other long-term liabilities” in the Consolidated Balance Sheet. Maturities of lease liabilities were as follows: Operating Leases Finance Leases Period ending December 31, 2019 (excluding the nine months ended September 30, 2019) $ 1.2 $ 1.6 2020 4.4 5.3 2021 3.2 3.8 2022 1.4 2.9 2023 1.2 2.4 Thereafter 0.8 17.2 Total lease payments 12.2 33.2 Less imputed interest (1.1 ) (9.4 ) Total $ 11.1 $ 23.8
Leases	LEASES We have leases for office space, warehousing, vehicles, mobile equipment and certain other equipment in our production facilities. Certain of these lease agreements provide rights to extend or terminate the contract which have been evaluated in estimating the lease term. Most of our lease contracts do not provide a readily determinable implicit rate. For these contracts, our estimated incremental borrowing rate is based on information available at the inception of the lease. Leases with an initial term of twelve months or less are not recorded on the Consolidated Balance Sheet. Lease expense for these leases is recognized on a straight-line basis over the term of the lease. The components of lease expense were as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Operating lease expense $ 1.2 $ 3.6 Finance lease expense Amortization of right-of-use assets $ 1.4 $ 3.7 Interest on lease liabilities 0.3 0.7 Total finance lease expense $ 1.7 $ 4.4 Short term lease expense $ 0.5 $ 1.5 Supplemental cash flow information related to leases was as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Cash paid for amounts included in the measurement of liabilities: Operating cash flows from operating leases $ (1.2 ) $ (3.7 ) Operating cash flows from finance leases (0.3 ) (0.7 ) Financing cash flows from finance leases (1.2 ) (3.6 ) Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 0.1 $ 3.1 Finance leases 1.0 18.3 Supplemental balance sheet information related to leases was as follows: September 30, 2019 Operating leases Operating lease right-of-use assets (a) $ 10.5 Current operating lease liabilities (a) $ 4.1 Long-term operating lease liabilities (a) 7.0 Total operating lease liabilities $ 11.1 Finance leases Finance lease right-of-use asset, gross $ 33.0 Finance lease right-of-use asset, accumulated amortization (9.4 ) Finance lease right-of-use asset, net (a) $ 23.6 Current finance lease liabilities (a) $ 4.4 Long-term finance lease liabilities (a) 19.4 Total finance lease liabilities $ 23.8 Weighted average remaining lease term Operating leases 3.3 years Finance leases 10.1 years Weighted average discount rate Operating leases 5.8 % Finance leases 6.0 % (a) Operating and finance lease right-of-use assets are included in “Other long-term assets” in the Consolidated Balance Sheet. Current operating and finance lease obligations are included in “Accrued liabilities” in the Consolidated Balance Sheet. Long-term operating and finance lease obligations are included in “Other long-term liabilities” in the Consolidated Balance Sheet. Maturities of lease liabilities were as follows: Operating Leases Finance Leases Period ending December 31, 2019 (excluding the nine months ended September 30, 2019) $ 1.2 $ 1.6 2020 4.4 5.3 2021 3.2 3.8 2022 1.4 2.9 2023 1.2 2.4 Thereafter 0.8 17.2 Total lease payments 12.2 33.2 Less imputed interest (1.1 ) (9.4 ) Total $ 11.1 $ 23.8

Potential Acquisition of Aleris

Potential Acquisition of Aleris Corporation	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Potential Acquisition of Aleris Corporation	POTENTIAL ACQUISITION OF ALERIS CORPORATION On July 26, 2018, we announced that we entered into a definitive agreement (the “Merger Agreement”) to be acquired by Novelis Inc., a subsidiary of Hindalco Industries Limited, for approximately $2,600.0 , including the assumption of the Company’s outstanding indebtedness (the “Merger”). The Merger is expected to close by January 21, 2020, the outside date in the Merger Agreement, subject to customary regulatory approvals and closing conditions. There can be no assurance that the Merger will be consummated on the expected timing or at all.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	9 Months Ended
	Sep. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Consolidating Financial Statements	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Aleris Corporation, the direct parent of Aleris International, and Aleris International’s domestic restricted subsidiaries that guarantee Aleris International’s existing obligation under the Term Loan Facility and the ABL Facility are guarantors of the indebtedness under the 2023 Junior Priority Notes (the “Guarantor Subsidiaries”). Aleris Corporation and each of the Guarantor Subsidiaries have fully and unconditionally guaranteed (subject, in the case of the Guarantor Subsidiaries, to customary release provisions as described below), on a joint and several basis, to pay principal and interest related to the 2023 Junior Priority Notes and Aleris International and each of the Guarantor Subsidiaries are directly or indirectly 100% owned subsidiaries of Aleris Corporation. For purposes of complying with the reporting requirements of Aleris International and the Guarantor Subsidiaries, presented below are condensed consolidating financial statements of Aleris Corporation, Aleris International, the Guarantor Subsidiaries, and those other subsidiaries of Aleris Corporation that are not guaranteeing the indebtedness under the 2023 Junior Priority Notes (the “Non-Guarantor Subsidiaries”). The condensed consolidating balance sheets are presented as of September 30, 2019 and December 31, 2018 . The condensed consolidating statements of comprehensive income (loss) are presented for the three and nine months ended September 30, 2019 and 2018 . The condensed consolidating statements of cash flows are presented for the nine months ended September 30, 2019 and 2018 . The guarantee of a Guarantor Subsidiary will be automatically and unconditionally released and discharged under the indenture governing the 2023 Junior Priority Notes in the event of: ▪ any sale of the Guarantor Subsidiary or of all or substantially all of its assets; ▪ a Guarantor Subsidiary being designated as an “unrestricted subsidiary” in accordance with the indenture governing the 2023 Junior Priority Notes; ▪ the release or discharge of a Guarantor Subsidiary from its guarantee under the Term Loan Facility, the ABL Facility or other indebtedness that resulted in the obligation of the Guarantor Subsidiary under the indenture governing the 2023 Junior Priority Notes; and ▪ the requirements for legal defeasance or covenant defeasance or discharge of the indenture governing the 2023 Junior Priority Notes having been satisfied. As of September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current Assets Cash and cash equivalents $ — $ 15.9 $ — $ 30.4 $ (1.6 ) $ 44.7 Accounts receivable, net — — 182.7 213.1 — 395.8 Inventories — — 424.7 327.7 — 752.4 Prepaid expenses and other current assets — 4.6 7.1 46.3 — 58.0 Intercompany receivables — 101.1 88.1 4.8 (194.0 ) — Total Current Assets — 121.6 702.6 622.3 (195.6 ) 1,250.9 Property, plant and equipment, net — 1.3 824.2 502.3 — 1,327.8 Intangible assets, net — — 15.1 15.9 — 31.0 Deferred income taxes — — — 60.2 — 60.2 Other long-term assets — 13.1 21.6 38.5 — 73.2 Investments in subsidiaries (30.2 ) 1,727.2 7.2 — (1,704.2 ) — Total Assets $ (30.2 ) $ 1,863.2 $ 1,570.7 $ 1,239.2 $ (1,899.8 ) $ 2,743.1 LIABILITIES AND STOCKHOLDERS’ EQUITY Current Liabilities Accounts payable $ — $ 3.5 $ 154.0 $ 146.9 $ (1.6 ) $ 302.8 Accrued liabilities — 37.2 61.5 92.8 — 191.5 Current portion of long-term debt — 55.7 — 16.8 — 72.5 Intercompany payables — 74.2 93.7 26.1 (194.0 ) — Total Current Liabilities — 170.6 309.2 282.6 (195.6 ) 566.8 Long-term debt — 1,714.0 — 172.6 — 1,886.6 Deferred revenue — — 55.0 — — 55.0 Deferred income taxes — — 0.3 8.4 — 8.7 Accrued pension benefits — — 41.6 113.9 — 155.5 Accrued postretirement benefits — — 29.1 — — 29.1 Other long-term liabilities — 8.8 29.6 33.2 — 71.6 Total Long-Term Liabilities — 1,722.8 155.6 328.1 — 2,206.5 Total equity (30.2 ) (30.2 ) 1,105.9 628.5 (1,704.2 ) (30.2 ) Total Liabilities and Equity $ (30.2 ) $ 1,863.2 $ 1,570.7 $ 1,239.2 $ (1,899.8 ) $ 2,743.1 As of December 31, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current Assets Cash and cash equivalents $ — $ 32.5 $ — $ 76.8 $ (0.7 ) $ 108.6 Accounts receivable, net — — 133.5 175.3 — 308.8 Inventories — — 427.9 345.0 — 772.9 Prepaid expenses and other current assets — 3.3 12.0 47.4 — 62.7 Intercompany receivables — 628.1 333.6 17.5 (979.2 ) — Total Current Assets — 663.9 907.0 662.0 (979.9 ) 1,253.0 Property, plant and equipment, net — 0.9 860.9 533.2 — 1,395.0 Intangible assets, net — — 16.6 15.9 — 32.5 Deferred income taxes — — — 60.2 — 60.2 Other long-term assets — 8.0 3.9 26.8 — 38.7 Investments in subsidiaries 4.8 1,395.9 4.4 — (1,405.1 ) — Total Assets $ 4.8 $ 2,068.7 $ 1,792.8 $ 1,298.1 $ (2,385.0 ) $ 2,779.4 LIABILITIES AND STOCKHOLDERS’ EQUITY Current Liabilities Accounts payable $ — $ 5.9 $ 199.4 $ 170.2 $ (0.7 ) $ 374.8 Accrued liabilities — 54.0 64.1 80.0 — 198.1 Current portion of long-term debt — 11.0 1.0 9.9 — 21.9 Intercompany payables 31.9 308.0 589.2 50.1 (979.2 ) — Total Current Liabilities 31.9 378.9 853.7 310.2 (979.9 ) 594.8 Long-term debt — 1,681.4 0.5 224.5 — 1,906.4 Deferred revenue — — 65.0 — — 65.0 Deferred income taxes — — 0.1 0.8 — 0.9 Accrued pension benefits — — 44.9 118.8 — 163.7 Accrued postretirement benefits — — 29.6 — — 29.6 Other long-term liabilities — 3.6 14.9 27.6 — 46.1 Total Long-Term Liabilities — 1,685.0 155.0 371.7 — 2,211.7 Total equity (27.1 ) 4.8 784.1 616.2 (1,405.1 ) (27.1 ) Total Liabilities and Equity $ 4.8 $ 2,068.7 $ 1,792.8 $ 1,298.1 $ (2,385.0 ) $ 2,779.4 For the three months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 496.6 $ 364.9 $ (4.7 ) $ 856.8 Cost of sales — — 439.1 309.6 (4.7 ) 744.0 Gross profit — — 57.5 55.3 — 112.8 Selling, general and administrative expenses — 13.9 15.9 20.4 — 50.2 Restructuring charges — — 0.3 0.1 — 0.4 (Gains) losses on derivative financial instruments — — (12.9 ) 6.5 — (6.4 ) Other operating expense, net — — 0.5 — — 0.5 Operating (loss) income — (13.9 ) 53.7 28.3 — 68.1 Interest expense, net — 1.2 31.0 6.9 — 39.1 Other (income) expense, net — (9.6 ) 8.2 0.5 — (0.9 ) Equity in net earnings of affiliates (24.9 ) (30.5 ) (1.0 ) — 56.4 — Income before income taxes 24.9 25.0 15.5 20.9 (56.4 ) 29.9 Provision for income taxes — 0.1 0.1 4.8 — 5.0 Net income $ 24.9 $ 24.9 $ 15.4 $ 16.1 $ (56.4 ) $ 24.9 Comprehensive income (loss) $ 0.6 $ 0.6 $ 14.6 $ (7.3 ) $ (7.9 ) $ 0.6 For the three months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 532.5 $ 383.7 $ (4.9 ) $ 911.3 Cost of sales — — 514.0 336.5 (4.9 ) 845.6 Gross profit — — 18.5 47.2 — 65.7 Selling, general and administrative expenses 0.1 13.3 17.9 21.9 — 53.2 Restructuring charges — — 0.3 (0.1 ) 0.2 (Gains) losses on derivative financial instruments — — (7.3 ) 1.0 — (6.3 ) Other operating expense, net — — 0.8 — — 0.8 Operating (loss) income (0.1 ) (13.3 ) 6.8 24.4 — 17.8 Interest expense, net — 5.1 24.8 7.6 — 37.5 Other (income) expense, net — (4.0 ) 2.7 2.2 — 0.9 Equity in net loss (earnings) of affiliates 25.9 11.5 (0.4 ) — (37.0 ) — (Loss) income before income taxes (26.0 ) (25.9 ) (20.3 ) 14.6 37.0 (20.6 ) Provision for income taxes — — 0.2 5.2 — 5.4 Net (loss) income $ (26.0 ) $ (25.9 ) $ (20.5 ) $ 9.4 $ 37.0 $ (26.0 ) Comprehensive (loss) income $ (35.1 ) $ (35.0 ) $ (20.7 ) $ 0.5 $ 55.2 $ (35.1 ) For the nine months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 1,527.4 $ 1,136.2 $ (13.1 ) $ 2,650.5 Cost of sales — — 1,384.1 978.1 (13.1 ) 2,349.1 Gross profit — — 143.3 158.1 — 301.4 Selling, general and administrative expenses — 43.6 49.3 63.0 — 155.9 Restructuring charges — — 1.7 0.3 — 2.0 (Gains) losses on derivative financial instruments — — (24.2 ) 6.0 — (18.2 ) Other operating expense, net — — 1.2 — — 1.2 Operating (loss) income — (43.6 ) 115.3 88.8 — 160.5 Interest expense, net — 4.2 92.8 21.9 — 118.9 Other (income) expense, net — (28.3 ) 24.6 5.3 — 1.6 Equity in net earnings of affiliates (16.1 ) (35.7 ) (2.7 ) — 54.5 — Income before income taxes 16.1 16.2 0.6 61.6 (54.5 ) 40.0 Provision for (benefit from) income taxes — 0.1 (0.3 ) 24.1 — 23.9 Net income $ 16.1 $ 16.1 $ 0.9 $ 37.5 $ (54.5 ) $ 16.1 Comprehensive (loss) income $ (8.6 ) $ (8.6 ) $ 1.2 $ 12.5 $ (5.1 ) $ (8.6 ) For the nine months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 1,471.9 $ 1,193.0 $ (20.7 ) $ 2,644.2 Cost of sales — — 1,380.7 1,054.6 (20.7 ) 2,414.6 Gross profit — — 91.2 138.4 — 229.6 Selling, general and administrative expenses 0.1 32.0 52.8 68.8 — 153.7 Restructuring charges — — 1.3 0.7 — 2.0 (Gains) losses on derivative financial instruments — — (23.3 ) 4.3 — (19.0 ) Other operating expense, net — — 1.9 — — 1.9 Operating (loss) income (0.1 ) (32.0 ) 58.5 64.6 — 91.0 Interest expense, net 3.7 6.7 74.1 21.5 — 106.0 Debt extinguishment costs — 48.9 — — — 48.9 Other expense (income), net 11.0 (25.2 ) 8.1 (4.1 ) — (10.2 ) Equity in net loss (earnings) of affiliates 53.6 (8.9 ) (1.7 ) — (43.0 ) — (Loss) income before income taxes (68.4 ) (53.5 ) (22.0 ) 47.2 43.0 (53.7 ) Provision for (beneift from) income taxes — 0.1 (0.6 ) 15.2 — 14.7 Net (loss) income $ (68.4 ) $ (53.6 ) $ (21.4 ) $ 32.0 $ 43.0 $ (68.4 ) Comprehensive (loss) income $ (87.6 ) $ (72.8 ) $ (21.5 ) $ 12.9 $ 81.4 $ (87.6 ) For the nine months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Net cash (used) provided by operating activities $ (31.8 ) $ 265.2 $ (278.7 ) $ 20.7 $ (1.7 ) $ (26.3 ) Investing activities Payments for property, plant and equipment — (1.0 ) (39.4 ) (33.2 ) — (73.6 ) Equity contributions in subsidiaries — (320.6 ) (0.8 ) — 321.4 — Return of investment in subsidiaries 31.8 — — — (31.8 ) — Other — — (0.8 ) 0.1 — (0.7 ) Net cash provided (used) by investing activities 31.8 (321.6 ) (41.0 ) (33.1 ) 289.6 (74.3 ) Financing activities Proceeds from the revolving credit facilities — 125.0 — 33.4 — 158.4 Payments on the revolving credit facilities — (45.0 ) — (56.2 ) — (101.2 ) Payments on term loans — (8.3 ) — — — (8.3 ) Payments on other long-term debt and finance leases — (0.1 ) (0.9 ) (9.6 ) — (10.6 ) Proceeds from intercompany equity contributions — — 320.6 0.8 (321.4 ) — Dividends paid — (31.8 ) — (0.8 ) 32.6 — Other — — — (0.1 ) — (0.1 ) Net cash provided (used) by financing activities — 39.8 319.7 (32.5 ) (288.8 ) 38.2 Effect of exchange rate differences on cash, cash equivalents and restricted cash — — — (1.7 ) — (1.7 ) Net decrease in cash, cash equivalents and restricted cash — (16.6 ) — (46.6 ) (0.9 ) (64.1 ) Cash, cash equivalents and restricted cash at beginning of period — 32.5 — 83.8 (0.7 ) 115.6 Cash, cash equivalents and restricted cash at end of period $ — $ 15.9 $ — $ 37.2 $ (1.6 ) $ 51.5 Cash and cash equivalents $ — $ 15.9 $ — $ 30.4 $ (1.6 ) $ 44.7 Restricted cash (included in “Other current assets”) — — — 6.8 — 6.8 Cash, cash equivalents and restricted cash $ — $ 15.9 $ — $ 37.2 $ (1.6 ) $ 51.5 For the nine months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Net cash provided (used) by operating activities $ 0.2 $ (92.6 ) $ 35.3 $ 31.7 $ (42.0 ) $ (67.4 ) Investing activities Payments for property, plant and equipment — (0.2 ) (45.3 ) (30.8 ) — (76.3 ) Disbursements of intercompany loans — — — (25.4 ) 25.4 — Repayments from intercompany loans — — — 39.5 (39.5 ) — Equity contributions in subsidiaries — (23.2 ) (0.5 ) — 23.7 — Return of investments in subsidiaries — — 0.1 — (0.1 ) — Other — — (1.1 ) 0.5 — (0.6 ) Net cash used by investing activities — (23.4 ) (46.8 ) (16.2 ) 9.5 (76.9 ) Financing activities Proceeds from revolving credit facilities — 125.0 — 95.3 — 220.3 Payments on revolving credit facilities — (205.0 ) — (79.4 ) — (284.4 ) Proceeds from senior secured notes, net of discount — 1,483.0 — — — 1,483.0 Payments on senior notes, including premiums — (1,289.5 ) — — — (1,289.5 ) Payments on other long-term debt — — (0.9 ) (7.7 ) — (8.6 ) Debt issuance costs — (19.5 ) — (0.9 ) — (20.4 ) Proceeds from intercompany loans — 25.4 — — (25.4 ) — Repayments on intercompany loans — (39.5 ) — — 39.5 — Proceeds from intercompany equity contributions — — 13.7 10.0 (23.7 ) — Dividends paid — — (2.0 ) (40.0 ) 42.0 — Other (0.2 ) — 0.7 (0.7 ) — (0.2 ) Net cash (used) provided by financing activities (0.2 ) 79.9 11.5 (23.4 ) 32.4 100.2 Effect of exchange rate differences on cash, cash equivalents and restricted cash — — — (1.9 ) — (1.9 ) Net decrease in cash, cash equivalents and restricted cash — (36.1 ) — (9.8 ) (0.1 ) (46.0 ) Cash, cash equivalents and restricted cash at beginning of period — 40.3 — 69.9 (2.2 ) 108.0 Cash, cash equivalents and restricted cash at end of period $ — $ 4.2 $ — $ 60.1 $ (2.3 ) $ 62.0 Cash and cash equivalents $ — $ 4.2 $ — $ 54.8 $ (2.3 ) 56.7 Restricted cash (included in “Other current assets”) — — — 5.3 — 5.3 Cash, cash equivalents and restricted cash $ — $ 4.2 $ — $ 60.1 $ (2.3 ) $ 62.0

Basis of Presentation and Rec_2

Basis of Presentation and Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
Consolidation	The operating results for interim periods contained herein are not necessarily indicative of the results that may be expected for any other interim period or for the full year. The accompanying Consolidated Financial Statements include the accounts of Aleris Corporation and all of its subsidiaries (collectively, except where the context otherwise requires, referred to as “Aleris,” “we,” “us,” “our,” “Company” or similar terms). Aleris Corporation is a holding company and currently conducts its business and operations through its direct wholly owned subsidiary, Aleris International, Inc. and its consolidated subsidiaries. Aleris International, Inc. is referred to herein as “Aleris International.”
Recent Accounting Pronouncements	In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes the impairment model for most financial instruments. Current guidance requires the recognition of credit losses based on an incurred loss impairment methodology that reflects losses once the losses are probable. Under ASU 2016-13, we will be required to use a current expected credit loss model (CECL) that will immediately recognize an estimate of credit losses that are expected to occur over the life of the financial instruments that are in the scope of this update, including trade receivables. The CECL model uses a broader range of reasonable and supportable information in the development of credit loss estimates than our current model. This guidance becomes effective for us on January 1, 2020, including the interim periods in the year. We are currently evaluating the impact that the adoption of this ASU will have on the consolidated financial statements and related disclosures In February 2016, the FASB issued ASU No. 2016-02, “Leases” (“ASU 2016-02”). This guidance requires lessees to put most leases on their balance sheets but recognize expense on the income statement in a manner similar to the previous guidance. We adopted ASU 2016-02 on January 1, 2019 using a modified retrospective approach, applying the standard’s transition provisions at the beginning of the period of adoption. ASU 2016-02 provided for certain practical expedients when adopting the guidance. We elected the package of practical expedients allowing us to not reassess (i) whether any expired or existing contracts are, or contain, leases, (ii) the lease classification for any expired or existing leases or (iii) initial direct costs for any expired or existing leases. Upon adoption, we recorded operating lease right-of-use assets of $10.8 , representing the present value of future lease payments under operating leases with terms of greater than twelve months. We also recorded corresponding operating lease liabilities of $11.5 . In addition, the prior capital lease balances of $10.4 , $4.0 and $6.2 previously reported in fixed assets, current maturities of long-term debt and long-term debt, respectively, were reclassified into separately classified right-of-use asset and lease obligation accounts. The adoption had no impact on reported net income or loss or retained deficit. See Note 13, “Leases” for additional information.

Revenue From Contracts with C_2

Revenue From Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table discloses the disaggregated revenue from our contracts with customers by major end-use: For the three months ended September 30, 2019 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 97.2 $ 38.5 $ (2.5 ) $ 133.2 Automotive 118.4 80.0 — (4.7 ) 193.7 Heat exchanger — 59.1 — — 59.1 Building and construction 203.9 22.8 — — 226.7 Truck trailer 57.1 5.2 — — 62.3 Distribution 73.9 13.0 8.6 — 95.5 Regional plate and sheet — 34.1 — — 34.1 Other 43.3 7.7 1.2 — 52.2 $ 496.6 $ 319.1 $ 48.3 $ (7.2 ) $ 856.8 For the three months ended September 30, 2018 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 73.2 $ 21.5 $ — $ 94.7 Automotive 77.8 97.5 — (4.9 ) 170.4 Heat exchanger — 69.7 — — 69.7 Building and construction 230.5 — — — 230.5 Truck trailer 52.5 — — — 52.5 Distribution 118.0 — 12.5 (0.4 ) 130.1 Regional plate and sheet — 94.2 — — 94.2 Other 53.6 14.2 1.5 (0.1 ) 69.2 $ 532.4 $ 348.8 $ 35.5 $ (5.4 ) $ 911.3 For the nine months ended September 30, 2019 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 274.5 $ 102.5 $ (3.1 ) $ 373.9 Automotive 358.8 256.0 — (12.7 ) 602.1 Heat exchanger — 171.8 — — 171.8 Building and construction 594.3 76.1 — — 670.4 Truck trailer 190.2 19.4 — — 209.6 Distribution 244.3 55.7 28.5 — 328.5 Regional plate and sheet — 117.3 — — 117.3 Other 139.7 32.9 4.3 — 176.9 $ 1,527.3 $ 1,003.7 $ 135.3 $ (15.8 ) $ 2,650.5 For the nine months ended September 30, 2018 North America Europe Asia Pacific Intra-entity sales Total Aerospace $ — $ 216.0 $ 60.3 $ — $ 276.3 Automotive 136.6 305.9 — (20.7 ) 421.8 Heat exchanger — 208.1 — — 208.1 Building and construction 657.4 — — — 657.4 Truck trailer 149.0 — — — 149.0 Distribution 369.9 — 46.1 (0.8 ) 415.2 Regional plate and sheet — 312.5 — — 312.5 Other 159.0 42.2 3.0 (0.3 ) 203.9 $ 1,471.9 $ 1,084.7 $ 109.4 $ (21.8 ) $ 2,644.2
Contract with Customer, Asset and Liability	The following table details the deferred revenue for which our performance obligations have not been satisfied: Total Deferred Revenue Deferred revenue at January 1, 2019 $ 81.9 (a) Payments received 8.0 Revenue recognized (20.2 ) Currency and other (0.1 ) Deferred revenue at September 30, 2019 $ 69.6 (a) (a) Deferred revenue is included in “Deferred revenue” and “Accrued liabilities” in the Consolidated Balance Sheet.

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Components of Inventory	The components of our “Inventories” as of September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Raw materials $ 297.0 $ 283.8 Work in process 287.0 284.5 Finished goods 130.9 169.1 Supplies 37.5 35.5 Total inventories $ 752.4 $ 772.9

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Debt	Our debt as of September 30, 2019 and December 31, 2018 is summarized as follows: September 30, 2019 December 31, 2018 ABL Facility $ 308.7 $ 253.7 First Lien Term Loan due 2023 ("Term Loan Facility"), net of discount and deferred issuance costs of $20.0 and $24.3 at September 30, 2019 and December 31, 2018, respectively 1,066.2 1,070.2 10.75% Senior Secured Junior Priority Notes due 2023 ("2023 Junior Priority Notes"), net of discount and deferred issuance costs of $6.2 and $7.5 at September 30, 2019 and December 31, 2018, respectively 393.8 392.5 Exchangeable Notes, net of discount of $0.1 and $0.2 at September 30, 2019 and December 31, 2018, respectively 44.7 44.6 Zhenjiang Term Loans, net of discount of $0.3 and $0.4 at September 30, 2019 and December 31, 2018, respectively 145.7 157.2 Other — 10.1 Total debt 1,959.1 1,928.3 Less: Current portion of long-term debt 72.5 21.9 Total long-term debt $ 1,886.6 $ 1,906.4

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Changes in the Number of Outstanding Common Shares	The following table shows changes in the number of our issued and outstanding shares of common stock: For the nine months ended Issued and outstanding shares of common stock September 30, 2019 September 30, 2018 Balance at the beginning of the period 32,380,867 32,001,318 Issuance associated with vested restricted stock units — 225,371 Shares cancelled — (3,418 ) Balance at the end of the period 32,380,867 32,223,271

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income	The following table summarizes the activity within accumulated other comprehensive loss for the nine months ended September 30, 2019 : Currency translation Pension and other postretirement Total Balance at January 1, 2019 $ (93.3 ) $ (73.7 ) $ (167.0 ) Current period currency translation adjustments (28.8 ) 1.3 (27.5 ) Amortization of net actuarial losses and prior service costs, net of tax — 2.8 2.8 Balance at September 30, 2019 $ (122.1 ) $ (69.6 ) $ (191.7 )
Schedule of Amounts Recognized in Other Comprehensive Income	A summary of reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2019 is provided below: Description of reclassifications out of accumulated other comprehensive loss Amount reclassified Amortization of net actuarial losses and prior service costs (recorded in “Other (income) expense, net”) $ (3.3 ) Deferred tax benefit on pension and other postretirement liability adjustments 0.5 Losses reclassified into earnings, net of tax $ (2.8 )

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The following table shows our revenues and segment income for our reportable segments for the periods presented in our Consolidated Statements of Comprehensive Income (Loss) : Three months ended September 30, 2019 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 496.6 $ 311.9 $ 48.3 $ 856.8 Intra-entity revenues — 7.2 — $ (7.2 ) — Total revenues $ 496.6 $ 319.1 $ 48.3 $ (7.2 ) $ 856.8 Segment income $ 77.3 $ 37.6 $ 11.6 $ 126.5 Three months ended September 30, 2018 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 532.4 $ 343.8 $ 35.1 $ 911.3 Intra-entity revenues — 5.0 0.4 $ (5.4 ) — Total revenues $ 532.4 $ 348.8 $ 35.5 $ (5.4 ) $ 911.3 Segment income $ 52.4 $ 30.4 $ 7.0 $ 89.8 Nine months ended September 30, 2019 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 1,527.3 $ 987.9 $ 135.3 $ 2,650.5 Intra-entity revenues — 15.8 — $ (15.8 ) — Total revenues $ 1,527.3 $ 1,003.7 $ 135.3 $ (15.8 ) $ 2,650.5 Segment income $ 208.8 $ 107.3 $ 29.3 $ 345.4 Nine months ended September 30, 2018 North America Europe Asia Pacific Intra-entity Revenues Total Revenues to external customers $ 1,471.9 $ 1,063.8 $ 108.5 $ 2,644.2 Intra-entity revenues — 20.9 0.9 $ (21.8 ) — Total revenues $ 1,471.9 $ 1,084.7 $ 109.4 $ (21.8 ) $ 2,644.2 Segment income $ 165.5 $ 101.0 $ 16.1 $ 282.6
Schedule of Segment Reporting Information, by Segment	The following table reconciles total segment income to “ Income (loss) before income taxes ” as reported in our Consolidated Statements of Comprehensive Income (Loss) : For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Total segment income $ 126.5 $ 89.8 $ 345.4 $ 282.6 Unallocated amounts: Depreciation and amortization (35.8 ) (35.0 ) (105.5 ) (103.8 ) Other corporate general and administrative expenses (15.2 ) (15.3 ) (47.0 ) (37.9 ) Restructuring charges (0.4 ) (0.2 ) (2.0 ) (2.0 ) Interest expense, net (39.1 ) (37.5 ) (118.9 ) (106.0 ) Unallocated (losses) gains on derivative financial instruments (4.6 ) (10.5 ) (23.6 ) 3.0 Unallocated currency exchange losses (0.9 ) (1.1 ) (0.9 ) (2.4 ) Start-up costs (0.9 ) (9.8 ) (6.8 ) (48.7 ) Loss on extinguishment of debt — — — (48.9 ) Other income (expense), net 0.3 (1.0 ) (0.7 ) 10.4 Income (loss) before income taxes $ 29.9 $ (20.6 ) $ 40.0 $ (53.7 )
Reconciliation of Assets from Segment to Consolidated	The following table shows our reportable segment assets as of September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 Assets North America $ 1,480.9 $ 1,460.0 Europe 739.2 736.4 Asia Pacific 341.2 340.2 Unallocated assets 181.8 242.8 Total consolidated assets $ 2,743.1 $ 2,779.4

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	The components of net postretirement benefit expense are as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 0.1 $ 0.1 $ 0.2 $ 0.3 Interest cost 0.3 0.2 0.9 0.8 Amortization of net actuarial gains (0.3 ) (0.2 ) (0.8 ) (0.6 ) Amortization of prior service cost 0.1 0.1 0.2 0.2 Net postretirement benefit expense $ 0.2 $ 0.2 $ 0.5 $ 0.7
U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	The components of the net periodic benefit expense are as follows: U.S. pension benefits For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 1.1 $ 1.1 $ 3.2 $ 3.3 Interest cost 1.6 1.4 4.9 4.3 Amortization of net actuarial losses 0.6 0.5 1.9 1.4 Amortization of prior service cost 0.1 0.1 0.2 0.2 Expected return on plan assets (2.3 ) (2.6 ) (6.9 ) (7.7 ) Net periodic benefit expense $ 1.1 $ 0.5 $ 3.3 $ 1.5
Non U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	Non U.S. pension benefits For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Service cost $ 0.6 $ 0.6 $ 1.7 $ 1.9 Interest cost 0.5 0.5 1.6 1.5 Amortization of net actuarial losses 0.6 0.7 1.8 2.1 Expected return on plan assets — — (0.1 ) — Net periodic benefit expense $ 1.7 $ 1.8 $ 5.0 $ 5.5

Derivative and Other Financia_2

Derivative and Other Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The amounts shown in the table below represent the gross amounts of recognized assets and liabilities, the amounts offset in the Consolidated Balance Sheet and the net amounts of assets and liabilities presented therein. As of September 30, 2019 and December 31, 2018 , there were no amounts subject to an enforceable master netting arrangement or similar agreement that have not been offset in the Consolidated Balance Sheet. Fair Value of Derivatives as of September 30, 2019 December 31, 2018 Derivatives by Type Asset Liability Asset Liability Metal $ 20.1 $ (13.0 ) $ 52.3 $ (24.3 ) Energy — (1.0 ) 0.2 (1.6 ) Interest rate — — — (0.4 ) Currency 0.2 (7.4 ) 0.4 (4.5 ) Total 20.3 (21.4 ) 52.9 (30.8 ) Effect of counterparty netting (11.8 ) 11.8 (23.5 ) 23.5 Effect of cash collateral — — — 0.2 Net derivatives as classified in the balance sheet $ 8.5 $ (9.6 ) $ 29.4 $ (7.1 )
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The fair value of our derivative financial instruments at September 30, 2019 and December 31, 2018 are recorded in the Consolidated Balance Sheet as follows: Asset Derivatives Balance Sheet Location September 30, 2019 December 31, 2018 Metal Prepaid expenses and other current assets $ 8.5 $ 29.3 Energy Prepaid expenses and other current assets — 0.1 Total $ 8.5 $ 29.4 Liability Derivatives Balance Sheet Location September 30, 2019 December 31, 2018 Metal Accrued liabilities $ 0.6 $ — Other long-term liabilities 0.8 1.2 Energy Accrued liabilities 0.9 1.4 Other long-term liabilities 0.1 — Interest Rate Accrued liabilities — 0.4 Currency Accrued liabilities 5.3 3.0 Other long-term liabilities 1.9 1.1 Total $ 9.6 $ 7.1
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	Realized (gains) and losses on derivative financial instruments totaled the following: For the three months ended For the nine months ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Metal $ (13.0 ) $ (17.2 ) $ (46.1 ) $ (15.2 ) Energy 0.6 (0.1 ) 0.8 (0.4 ) Currency 1.4 0.5 3.6 (0.3 ) Interest Rate — — 0.5 —
Schedule of Fair Value Measurements, Nonrecurring	The carrying amount, fair values and level in the fair value hierarchy of our other financial instruments at September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Carrying Amount Fair Value Level in the Fair Value Hierarchy Carrying Amount Fair Value Level in the Fair Value Hierarchy Cash and cash equivalents $ 44.7 $ 44.7 Level 1 $ 108.6 $ 108.6 Level 1 Restricted cash 6.8 6.8 Level 1 7.0 7.0 Level 1 ABL Facility 308.7 308.7 Level 2 253.7 253.7 Level 2 Term Loan Facility 1,066.2 1,088.3 Level 1 1,070.2 1,088.2 Level 1 2023 Junior Priority Notes 393.8 422.5 Level 1 392.5 410.1 Level 1 Exchangeable Notes 44.7 60.7 Level 3 44.6 60.7 Level 3 Zhenjiang Term Loans 145.7 146.1 Level 3 157.2 157.6 Level 3

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease, Cost	The components of lease expense were as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Operating lease expense $ 1.2 $ 3.6 Finance lease expense Amortization of right-of-use assets $ 1.4 $ 3.7 Interest on lease liabilities 0.3 0.7 Total finance lease expense $ 1.7 $ 4.4 Short term lease expense $ 0.5 $ 1.5 Supplemental cash flow information related to leases was as follows: For the three months ended For the nine months ended September 30, 2019 September 30, 2019 Cash paid for amounts included in the measurement of liabilities: Operating cash flows from operating leases $ (1.2 ) $ (3.7 ) Operating cash flows from finance leases (0.3 ) (0.7 ) Financing cash flows from finance leases (1.2 ) (3.6 ) Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 0.1 $ 3.1 Finance leases 1.0 18.3
Schedule of Lease Related Assets and Liabilities	Supplemental balance sheet information related to leases was as follows: September 30, 2019 Operating leases Operating lease right-of-use assets (a) $ 10.5 Current operating lease liabilities (a) $ 4.1 Long-term operating lease liabilities (a) 7.0 Total operating lease liabilities $ 11.1 Finance leases Finance lease right-of-use asset, gross $ 33.0 Finance lease right-of-use asset, accumulated amortization (9.4 ) Finance lease right-of-use asset, net (a) $ 23.6 Current finance lease liabilities (a) $ 4.4 Long-term finance lease liabilities (a) 19.4 Total finance lease liabilities $ 23.8 Weighted average remaining lease term Operating leases 3.3 years Finance leases 10.1 years Weighted average discount rate Operating leases 5.8 % Finance leases 6.0 % (a) Operating and finance lease right-of-use assets are included in “Other long-term assets” in the Consolidated Balance Sheet. Current operating and finance lease obligations are included in “Accrued liabilities” in the Consolidated Balance Sheet. Long-term operating and finance lease obligations are included in “Other long-term liabilities” in the Consolidated Balance Sheet.
Finance Lease, Liability, Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases Period ending December 31, 2019 (excluding the nine months ended September 30, 2019) $ 1.2 $ 1.6 2020 4.4 5.3 2021 3.2 3.8 2022 1.4 2.9 2023 1.2 2.4 Thereafter 0.8 17.2 Total lease payments 12.2 33.2 Less imputed interest (1.1 ) (9.4 ) Total $ 11.1 $ 23.8
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases Period ending December 31, 2019 (excluding the nine months ended September 30, 2019) $ 1.2 $ 1.6 2020 4.4 5.3 2021 3.2 3.8 2022 1.4 2.9 2023 1.2 2.4 Thereafter 0.8 17.2 Total lease payments 12.2 33.2 Less imputed interest (1.1 ) (9.4 ) Total $ 11.1 $ 23.8

Condensed Consolidating Finan_2

Condensed Consolidating Financial Statements (Tables)	9 Months Ended
	Sep. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheet	As of September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current Assets Cash and cash equivalents $ — $ 15.9 $ — $ 30.4 $ (1.6 ) $ 44.7 Accounts receivable, net — — 182.7 213.1 — 395.8 Inventories — — 424.7 327.7 — 752.4 Prepaid expenses and other current assets — 4.6 7.1 46.3 — 58.0 Intercompany receivables — 101.1 88.1 4.8 (194.0 ) — Total Current Assets — 121.6 702.6 622.3 (195.6 ) 1,250.9 Property, plant and equipment, net — 1.3 824.2 502.3 — 1,327.8 Intangible assets, net — — 15.1 15.9 — 31.0 Deferred income taxes — — — 60.2 — 60.2 Other long-term assets — 13.1 21.6 38.5 — 73.2 Investments in subsidiaries (30.2 ) 1,727.2 7.2 — (1,704.2 ) — Total Assets $ (30.2 ) $ 1,863.2 $ 1,570.7 $ 1,239.2 $ (1,899.8 ) $ 2,743.1 LIABILITIES AND STOCKHOLDERS’ EQUITY Current Liabilities Accounts payable $ — $ 3.5 $ 154.0 $ 146.9 $ (1.6 ) $ 302.8 Accrued liabilities — 37.2 61.5 92.8 — 191.5 Current portion of long-term debt — 55.7 — 16.8 — 72.5 Intercompany payables — 74.2 93.7 26.1 (194.0 ) — Total Current Liabilities — 170.6 309.2 282.6 (195.6 ) 566.8 Long-term debt — 1,714.0 — 172.6 — 1,886.6 Deferred revenue — — 55.0 — — 55.0 Deferred income taxes — — 0.3 8.4 — 8.7 Accrued pension benefits — — 41.6 113.9 — 155.5 Accrued postretirement benefits — — 29.1 — — 29.1 Other long-term liabilities — 8.8 29.6 33.2 — 71.6 Total Long-Term Liabilities — 1,722.8 155.6 328.1 — 2,206.5 Total equity (30.2 ) (30.2 ) 1,105.9 628.5 (1,704.2 ) (30.2 ) Total Liabilities and Equity $ (30.2 ) $ 1,863.2 $ 1,570.7 $ 1,239.2 $ (1,899.8 ) $ 2,743.1 As of December 31, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current Assets Cash and cash equivalents $ — $ 32.5 $ — $ 76.8 $ (0.7 ) $ 108.6 Accounts receivable, net — — 133.5 175.3 — 308.8 Inventories — — 427.9 345.0 — 772.9 Prepaid expenses and other current assets — 3.3 12.0 47.4 — 62.7 Intercompany receivables — 628.1 333.6 17.5 (979.2 ) — Total Current Assets — 663.9 907.0 662.0 (979.9 ) 1,253.0 Property, plant and equipment, net — 0.9 860.9 533.2 — 1,395.0 Intangible assets, net — — 16.6 15.9 — 32.5 Deferred income taxes — — — 60.2 — 60.2 Other long-term assets — 8.0 3.9 26.8 — 38.7 Investments in subsidiaries 4.8 1,395.9 4.4 — (1,405.1 ) — Total Assets $ 4.8 $ 2,068.7 $ 1,792.8 $ 1,298.1 $ (2,385.0 ) $ 2,779.4 LIABILITIES AND STOCKHOLDERS’ EQUITY Current Liabilities Accounts payable $ — $ 5.9 $ 199.4 $ 170.2 $ (0.7 ) $ 374.8 Accrued liabilities — 54.0 64.1 80.0 — 198.1 Current portion of long-term debt — 11.0 1.0 9.9 — 21.9 Intercompany payables 31.9 308.0 589.2 50.1 (979.2 ) — Total Current Liabilities 31.9 378.9 853.7 310.2 (979.9 ) 594.8 Long-term debt — 1,681.4 0.5 224.5 — 1,906.4 Deferred revenue — — 65.0 — — 65.0 Deferred income taxes — — 0.1 0.8 — 0.9 Accrued pension benefits — — 44.9 118.8 — 163.7 Accrued postretirement benefits — — 29.6 — — 29.6 Other long-term liabilities — 3.6 14.9 27.6 — 46.1 Total Long-Term Liabilities — 1,685.0 155.0 371.7 — 2,211.7 Total equity (27.1 ) 4.8 784.1 616.2 (1,405.1 ) (27.1 ) Total Liabilities and Equity $ 4.8 $ 2,068.7 $ 1,792.8 $ 1,298.1 $ (2,385.0 ) $ 2,779.4
Schedule of Condensed Income Statement	For the three months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 496.6 $ 364.9 $ (4.7 ) $ 856.8 Cost of sales — — 439.1 309.6 (4.7 ) 744.0 Gross profit — — 57.5 55.3 — 112.8 Selling, general and administrative expenses — 13.9 15.9 20.4 — 50.2 Restructuring charges — — 0.3 0.1 — 0.4 (Gains) losses on derivative financial instruments — — (12.9 ) 6.5 — (6.4 ) Other operating expense, net — — 0.5 — — 0.5 Operating (loss) income — (13.9 ) 53.7 28.3 — 68.1 Interest expense, net — 1.2 31.0 6.9 — 39.1 Other (income) expense, net — (9.6 ) 8.2 0.5 — (0.9 ) Equity in net earnings of affiliates (24.9 ) (30.5 ) (1.0 ) — 56.4 — Income before income taxes 24.9 25.0 15.5 20.9 (56.4 ) 29.9 Provision for income taxes — 0.1 0.1 4.8 — 5.0 Net income $ 24.9 $ 24.9 $ 15.4 $ 16.1 $ (56.4 ) $ 24.9 Comprehensive income (loss) $ 0.6 $ 0.6 $ 14.6 $ (7.3 ) $ (7.9 ) $ 0.6 For the three months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 532.5 $ 383.7 $ (4.9 ) $ 911.3 Cost of sales — — 514.0 336.5 (4.9 ) 845.6 Gross profit — — 18.5 47.2 — 65.7 Selling, general and administrative expenses 0.1 13.3 17.9 21.9 — 53.2 Restructuring charges — — 0.3 (0.1 ) 0.2 (Gains) losses on derivative financial instruments — — (7.3 ) 1.0 — (6.3 ) Other operating expense, net — — 0.8 — — 0.8 Operating (loss) income (0.1 ) (13.3 ) 6.8 24.4 — 17.8 Interest expense, net — 5.1 24.8 7.6 — 37.5 Other (income) expense, net — (4.0 ) 2.7 2.2 — 0.9 Equity in net loss (earnings) of affiliates 25.9 11.5 (0.4 ) — (37.0 ) — (Loss) income before income taxes (26.0 ) (25.9 ) (20.3 ) 14.6 37.0 (20.6 ) Provision for income taxes — — 0.2 5.2 — 5.4 Net (loss) income $ (26.0 ) $ (25.9 ) $ (20.5 ) $ 9.4 $ 37.0 $ (26.0 ) Comprehensive (loss) income $ (35.1 ) $ (35.0 ) $ (20.7 ) $ 0.5 $ 55.2 $ (35.1 ) For the nine months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 1,527.4 $ 1,136.2 $ (13.1 ) $ 2,650.5 Cost of sales — — 1,384.1 978.1 (13.1 ) 2,349.1 Gross profit — — 143.3 158.1 — 301.4 Selling, general and administrative expenses — 43.6 49.3 63.0 — 155.9 Restructuring charges — — 1.7 0.3 — 2.0 (Gains) losses on derivative financial instruments — — (24.2 ) 6.0 — (18.2 ) Other operating expense, net — — 1.2 — — 1.2 Operating (loss) income — (43.6 ) 115.3 88.8 — 160.5 Interest expense, net — 4.2 92.8 21.9 — 118.9 Other (income) expense, net — (28.3 ) 24.6 5.3 — 1.6 Equity in net earnings of affiliates (16.1 ) (35.7 ) (2.7 ) — 54.5 — Income before income taxes 16.1 16.2 0.6 61.6 (54.5 ) 40.0 Provision for (benefit from) income taxes — 0.1 (0.3 ) 24.1 — 23.9 Net income $ 16.1 $ 16.1 $ 0.9 $ 37.5 $ (54.5 ) $ 16.1 Comprehensive (loss) income $ (8.6 ) $ (8.6 ) $ 1.2 $ 12.5 $ (5.1 ) $ (8.6 ) For the nine months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ — $ 1,471.9 $ 1,193.0 $ (20.7 ) $ 2,644.2 Cost of sales — — 1,380.7 1,054.6 (20.7 ) 2,414.6 Gross profit — — 91.2 138.4 — 229.6 Selling, general and administrative expenses 0.1 32.0 52.8 68.8 — 153.7 Restructuring charges — — 1.3 0.7 — 2.0 (Gains) losses on derivative financial instruments — — (23.3 ) 4.3 — (19.0 ) Other operating expense, net — — 1.9 — — 1.9 Operating (loss) income (0.1 ) (32.0 ) 58.5 64.6 — 91.0 Interest expense, net 3.7 6.7 74.1 21.5 — 106.0 Debt extinguishment costs — 48.9 — — — 48.9 Other expense (income), net 11.0 (25.2 ) 8.1 (4.1 ) — (10.2 ) Equity in net loss (earnings) of affiliates 53.6 (8.9 ) (1.7 ) — (43.0 ) — (Loss) income before income taxes (68.4 ) (53.5 ) (22.0 ) 47.2 43.0 (53.7 ) Provision for (beneift from) income taxes — 0.1 (0.6 ) 15.2 — 14.7 Net (loss) income $ (68.4 ) $ (53.6 ) $ (21.4 ) $ 32.0 $ 43.0 $ (68.4 ) Comprehensive (loss) income $ (87.6 ) $ (72.8 ) $ (21.5 ) $ 12.9 $ 81.4 $ (87.6 )
Schedule of Condensed Cash Flow Statement	For the nine months ended September 30, 2019 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Net cash (used) provided by operating activities $ (31.8 ) $ 265.2 $ (278.7 ) $ 20.7 $ (1.7 ) $ (26.3 ) Investing activities Payments for property, plant and equipment — (1.0 ) (39.4 ) (33.2 ) — (73.6 ) Equity contributions in subsidiaries — (320.6 ) (0.8 ) — 321.4 — Return of investment in subsidiaries 31.8 — — — (31.8 ) — Other — — (0.8 ) 0.1 — (0.7 ) Net cash provided (used) by investing activities 31.8 (321.6 ) (41.0 ) (33.1 ) 289.6 (74.3 ) Financing activities Proceeds from the revolving credit facilities — 125.0 — 33.4 — 158.4 Payments on the revolving credit facilities — (45.0 ) — (56.2 ) — (101.2 ) Payments on term loans — (8.3 ) — — — (8.3 ) Payments on other long-term debt and finance leases — (0.1 ) (0.9 ) (9.6 ) — (10.6 ) Proceeds from intercompany equity contributions — — 320.6 0.8 (321.4 ) — Dividends paid — (31.8 ) — (0.8 ) 32.6 — Other — — — (0.1 ) — (0.1 ) Net cash provided (used) by financing activities — 39.8 319.7 (32.5 ) (288.8 ) 38.2 Effect of exchange rate differences on cash, cash equivalents and restricted cash — — — (1.7 ) — (1.7 ) Net decrease in cash, cash equivalents and restricted cash — (16.6 ) — (46.6 ) (0.9 ) (64.1 ) Cash, cash equivalents and restricted cash at beginning of period — 32.5 — 83.8 (0.7 ) 115.6 Cash, cash equivalents and restricted cash at end of period $ — $ 15.9 $ — $ 37.2 $ (1.6 ) $ 51.5 Cash and cash equivalents $ — $ 15.9 $ — $ 30.4 $ (1.6 ) $ 44.7 Restricted cash (included in “Other current assets”) — — — 6.8 — 6.8 Cash, cash equivalents and restricted cash $ — $ 15.9 $ — $ 37.2 $ (1.6 ) $ 51.5 For the nine months ended September 30, 2018 Aleris Corporation (Parent) Aleris International, Inc. Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated Net cash provided (used) by operating activities $ 0.2 $ (92.6 ) $ 35.3 $ 31.7 $ (42.0 ) $ (67.4 ) Investing activities Payments for property, plant and equipment — (0.2 ) (45.3 ) (30.8 ) — (76.3 ) Disbursements of intercompany loans — — — (25.4 ) 25.4 — Repayments from intercompany loans — — — 39.5 (39.5 ) — Equity contributions in subsidiaries — (23.2 ) (0.5 ) — 23.7 — Return of investments in subsidiaries — — 0.1 — (0.1 ) — Other — — (1.1 ) 0.5 — (0.6 ) Net cash used by investing activities — (23.4 ) (46.8 ) (16.2 ) 9.5 (76.9 ) Financing activities Proceeds from revolving credit facilities — 125.0 — 95.3 — 220.3 Payments on revolving credit facilities — (205.0 ) — (79.4 ) — (284.4 ) Proceeds from senior secured notes, net of discount — 1,483.0 — — — 1,483.0 Payments on senior notes, including premiums — (1,289.5 ) — — — (1,289.5 ) Payments on other long-term debt — — (0.9 ) (7.7 ) — (8.6 ) Debt issuance costs — (19.5 ) — (0.9 ) — (20.4 ) Proceeds from intercompany loans — 25.4 — — (25.4 ) — Repayments on intercompany loans — (39.5 ) — — 39.5 — Proceeds from intercompany equity contributions — — 13.7 10.0 (23.7 ) — Dividends paid — — (2.0 ) (40.0 ) 42.0 — Other (0.2 ) — 0.7 (0.7 ) — (0.2 ) Net cash (used) provided by financing activities (0.2 ) 79.9 11.5 (23.4 ) 32.4 100.2 Effect of exchange rate differences on cash, cash equivalents and restricted cash — — — (1.9 ) — (1.9 ) Net decrease in cash, cash equivalents and restricted cash — (36.1 ) — (9.8 ) (0.1 ) (46.0 ) Cash, cash equivalents and restricted cash at beginning of period — 40.3 — 69.9 (2.2 ) 108.0 Cash, cash equivalents and restricted cash at end of period $ — $ 4.2 $ — $ 60.1 $ (2.3 ) $ 62.0 Cash and cash equivalents $ — $ 4.2 $ — $ 54.8 $ (2.3 ) 56.7 Restricted cash (included in “Other current assets”) — — — 5.3 — 5.3 Cash, cash equivalents and restricted cash $ — $ 4.2 $ — $ 60.1 $ (2.3 ) $ 62.0

Basis of Presentation and Rec_3

Basis of Presentation and Recent Accounting Pronouncements (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 10.5
Operating lease, liability	$ 11.1
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 10.8
Operating lease, liability		11.5
Accounting Standards Update 2016-02 | Property, Plant and Equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capital lease obligations		10.4
Accounting Standards Update 2016-02 | Current Portion of Long-term Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capital lease obligations		4
Accounting Standards Update 2016-02 | Long-term Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capital lease obligations		$ 6.2

Revenue From Contracts with C_3

Revenue From Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 856.8	$ 911.3	$ 2,650.5	$ 2,644.2
North America
Disaggregation of Revenue [Line Items]
Revenues	496.6	532.4	1,527.3	1,471.9
Europe
Disaggregation of Revenue [Line Items]
Revenues	311.9	343.8	987.9	1,063.8
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	48.3	35.1	135.3	108.5
Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	496.6	532.4	1,527.3	1,471.9
Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	319.1	348.8	1,003.7	1,084.7
Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	48.3	35.5	135.3	109.4
Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	(7.2)	(5.4)	(15.8)	(21.8)
Intra-entity sales | North America
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Intra-entity sales | Europe
Disaggregation of Revenue [Line Items]
Revenues	7.2	5	15.8	20.9
Intra-entity sales | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0.4	0	0.9
Aerospace
Disaggregation of Revenue [Line Items]
Revenues	133.2	94.7	373.9	276.3
Aerospace | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Aerospace | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	97.2	73.2	274.5	216
Aerospace | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	38.5	21.5	102.5	60.3
Aerospace | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	(2.5)	0	(3.1)	0
Automotive
Disaggregation of Revenue [Line Items]
Revenues	193.7	170.4	602.1	421.8
Automotive | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	118.4	77.8	358.8	136.6
Automotive | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	80	97.5	256	305.9
Automotive | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Automotive | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	(4.7)	(4.9)	(12.7)	(20.7)
Heat exchanger
Disaggregation of Revenue [Line Items]
Revenues	59.1	69.7	171.8	208.1
Heat exchanger | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Heat exchanger | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	59.1	69.7	171.8	208.1
Heat exchanger | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Heat exchanger | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Building and construction
Disaggregation of Revenue [Line Items]
Revenues	226.7	230.5	670.4	657.4
Building and construction | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	203.9	230.5	594.3	657.4
Building and construction | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	22.8	0	76.1	0
Building and construction | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Building and construction | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Truck trailer
Disaggregation of Revenue [Line Items]
Revenues	62.3	52.5	209.6	149
Truck trailer | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	57.1	52.5	190.2	149
Truck trailer | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	5.2	0	19.4	0
Truck trailer | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Truck trailer | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Distribution
Disaggregation of Revenue [Line Items]
Revenues	95.5	130.1	328.5	415.2
Distribution | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	73.9	118	244.3	369.9
Distribution | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	13	0	55.7	0
Distribution | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	8.6	12.5	28.5	46.1
Distribution | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	0	(0.4)	0	(0.8)
Regional plate and sheet
Disaggregation of Revenue [Line Items]
Revenues	34.1	94.2	117.3	312.5
Regional plate and sheet | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Regional plate and sheet | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	34.1	94.2	117.3	312.5
Regional plate and sheet | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Regional plate and sheet | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Revenues	52.2	69.2	176.9	203.9
Other | Operating segments | North America
Disaggregation of Revenue [Line Items]
Revenues	43.3	53.6	139.7	159
Other | Operating segments | Europe
Disaggregation of Revenue [Line Items]
Revenues	7.7	14.2	32.9	42.2
Other | Operating segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	1.2	1.5	4.3	3
Other | Intra-entity sales
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ (0.1)	$ 0	$ (0.3)

Revenue From Contracts with C_4

Revenue From Contracts with Customers (Deferred Revenue) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Change in Contract with Customer, Liability [Roll Forward]
Deferred revenue at January 1, 2019	$ 81.9
Payments received	8
Revenue recognized	(20.2)
Currency and other	(0.1)
Deferred revenue at September 30, 2019	$ 69.6

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 297	$ 283.8
Work in process	287	284.5
Finished goods	130.9	169.1
Supplies	37.5	35.5
Total inventories	$ 752.4	$ 772.9

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Debt Instrument [Line Items]
Total debt	$ 1,959.1	$ 1,928.3
Less: Current portion of long-term debt	72.5	21.9
Total long-term debt	1,886.6	1,906.4
Restricted cash (included in “Prepaid expenses and other current assets”)	6.8		$ 5.3
Zhenjiang Term Loans
Debt Instrument [Line Items]
Restricted cash (included in “Prepaid expenses and other current assets”)	6.8	7
Line of Credit | ABL Facility
Debt Instrument [Line Items]
Total debt	308.7	253.7
Term Loan | Term Loan Facility
Debt Instrument [Line Items]
Total debt	1,066.2	1,070.2
Debt discount (premium) and deferred issuance costs	20	24.3
Senior Notes | 2023 Junior Priority Notes
Debt Instrument [Line Items]
Total debt	393.8	392.5
Debt discount (premium) and deferred issuance costs	$ 6.2	7.5
Stated interest rate	10.75%
Senior Subordinated Notes | Exchangeable Notes
Debt Instrument [Line Items]
Total debt	$ 44.7	44.6
Debt discount	0.1	0.2
Notes Payable to Banks | Zhenjiang Term Loans
Debt Instrument [Line Items]
Total debt	145.7	157.2
Debt discount	0.3	0.4
Other Long-term Debt
Debt Instrument [Line Items]
Total debt	$ 0	$ 10.1

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)Foreign_CountryState_in_USSite	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of superfund sites with operations and maintenance | Site	2
Number of states in which company performs environmental remediation | State_in_US	4
Number of foreign countries with environmental remediations | Foreign_Country	1
Number of sites with environmental remediations | Site	7
Reserves for environmental remediation liabilities	$ 24.5	$ 25.6
Portion of environmental liabilities indemnified by Corus Group Ltd.	11	11.9
Asset retirement obligation	$ 6.7	$ 6.8
Estimated time frame of disbursements	10 years

Stockholders' Equity (Changes i

Stockholders' Equity (Changes in the Number of Outstanding Common Stock) (Details) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Outstanding Shares of Common Stock [Roll Forward]
Balance at the beginning of the period (in shares)	32,380,867	32,001,318
Shares cancelled (in shares)	0	(3,418)
Balance at the end of the period (in shares)	32,380,867	32,223,271
Restricted Stock
Outstanding Shares of Common Stock [Roll Forward]
Issuance associated with vested restricted stock units (in shares)	0	225,371

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income [Roll Forward]
Balance at January 1, 2019	$ (33.8)	$ (63.2)	$ (27.1)	$ 32.4	$ 120.9	$ 92.7	$ (27.1)	$ 92.7
Current period currency translation adjustments							(27.5)
Amortization of net actuarial losses and prior service costs, net of tax							2.8
Balance at September 30, 2019	(30.2)	(33.8)	(63.2)	(0.8)	32.4	120.9	(30.2)	(0.8)
Amortization of net actuarial losses and prior service costs (recorded in “Other (income) expense, net”)	(0.5)			(0.8)			(1.2)	(1.9)
Deferred tax benefit on pension and other postretirement liability adjustments	(5)			(5.4)			(23.9)	(14.7)
Losses reclassified into earnings, net of tax	24.9	24.6	(33.4)	(26)	(46.9)	4.6	16.1	(68.4)
Total
Accumulated Other Comprehensive Income [Roll Forward]
Balance at January 1, 2019	(167.4)	(169.7)	(167)	(150.6)	(120)	(140.5)	(167)	(140.5)
Balance at September 30, 2019	(191.7)	$ (167.4)	(169.7)	(159.7)	(150.6)	$ (120)	(191.7)	$ (159.7)
Losses reclassified into earnings, net of tax				$ 0	$ 0
Currency translation
Accumulated Other Comprehensive Income [Roll Forward]
Balance at January 1, 2019			(93.3)				(93.3)
Current period currency translation adjustments							(28.8)
Amortization of net actuarial losses and prior service costs, net of tax							0
Balance at September 30, 2019	(122.1)						(122.1)
Pension and other postretirement
Accumulated Other Comprehensive Income [Roll Forward]
Balance at January 1, 2019			$ (73.7)				(73.7)
Current period currency translation adjustments							1.3
Amortization of net actuarial losses and prior service costs, net of tax							2.8
Balance at September 30, 2019	$ (69.6)						(69.6)
Pension and other postretirement | Amount reclassified
Accumulated Other Comprehensive Income [Roll Forward]
Amortization of net actuarial losses and prior service costs (recorded in “Other (income) expense, net”)							(3.3)
Deferred tax benefit on pension and other postretirement liability adjustments							0.5
Losses reclassified into earnings, net of tax							$ (2.8)

Segment Information (Schedule o

Segment Information (Schedule of Revenues and Segment Income) (Details) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Sep. 30, 2019USD ($)Operating_Segment	Sep. 30, 2018USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Operating_Segment							3
Revenue for Reportable Segments
Revenues to external customers	$ 856.8			$ 911.3			$ 2,650.5	$ 2,644.2
Net income (loss)	24.9	$ 24.6	$ (33.4)	(26)	$ (46.9)	$ 4.6	16.1	(68.4)
North America
Revenue for Reportable Segments
Revenues to external customers	496.6			532.4			1,527.3	1,471.9
Europe
Revenue for Reportable Segments
Revenues to external customers	311.9			343.8			987.9	1,063.8
Asia Pacific
Revenue for Reportable Segments
Revenues to external customers	48.3			35.1			135.3	108.5
Intra-entity sales
Revenue for Reportable Segments
Revenues to external customers	(7.2)			(5.4)			(15.8)	(21.8)
Intra-entity sales | North America
Revenue for Reportable Segments
Revenues to external customers	0			0			0	0
Intra-entity sales | Europe
Revenue for Reportable Segments
Revenues to external customers	7.2			5			15.8	20.9
Intra-entity sales | Asia Pacific
Revenue for Reportable Segments
Revenues to external customers	0			0.4			0	0.9
Operating segments
Revenue for Reportable Segments
Net income (loss)	126.5			89.8			345.4	282.6
Operating segments | North America
Revenue for Reportable Segments
Revenues to external customers	496.6			532.4			1,527.3	1,471.9
Net income (loss)	77.3			52.4			208.8	165.5
Operating segments | Europe
Revenue for Reportable Segments
Revenues to external customers	319.1			348.8			1,003.7	1,084.7
Net income (loss)	37.6			30.4			107.3	101
Operating segments | Asia Pacific
Revenue for Reportable Segments
Revenues to external customers	48.3			35.5			135.3	109.4
Net income (loss)	$ 11.6			$ 7			$ 29.3	$ 16.1

Segment Information (Reconcilia

Segment Information (Reconciliation of Segment Income to Consolidated Statements of Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ 29.9	$ (20.6)	$ 40	$ (53.7)
Depreciation and amortization			(105.5)	(103.8)
Restructuring charges	(0.4)	(0.2)	(2)	(2)
Interest expense, net	(39.1)	(37.5)	(118.9)	(106)
Unallocated (losses) gains on derivative financial instruments	6.4	6.3	18.2	19
Loss on extinguishment of debt	0	0	0	(48.9)
Other income (expense), net	(0.5)	(0.8)	(1.2)	(1.9)
Operating segments
Segment Reporting Information [Line Items]
Income (loss) before income taxes	126.5	89.8	345.4	282.6
Unallocated Amounts
Segment Reporting Information [Line Items]
Depreciation and amortization	(35.8)	(35)	(105.5)	(103.8)
Other corporate general and administrative expenses	(15.2)	(15.3)	(47)	(37.9)
Restructuring charges	(0.4)	(0.2)	(2)	(2)
Interest expense, net	(39.1)	(37.5)	(118.9)	(106)
Unallocated (losses) gains on derivative financial instruments	(4.6)	(10.5)	(23.6)	3
Unallocated currency exchange losses	(0.9)	(1.1)	(0.9)	(2.4)
Start-up costs	(0.9)	(9.8)	(6.8)	(48.7)
Loss on extinguishment of debt	0	0	0	(48.9)
Other income (expense), net	$ 0.3	$ (1)	$ (0.7)	$ 10.4

Segment Information (Reconcil_2

Segment Information (Reconciliation of Reportable Segment Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 2,743.1	$ 2,779.4
Operating segments | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,480.9	1,460
Operating segments | Europe
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	739.2	736.4
Operating segments | Asia Pacific
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	341.2	340.2
Unallocated Amounts
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 181.8	$ 242.8

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ in Millions	Jun. 01, 2010	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Life of award	10 years
Award vesting period	4 years
Stock options granted (in shares)				0
Stock-based compensation expense		$ 3	$ 2.1	$ 5.5	$ 2.8

Income Taxes (Details)

Income Taxes (Details) $ in Millions	3 Months Ended
	Sep. 30, 2019USD ($)
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 7.2
Unrecognized tax benefits that would impact effective tax rate	6.3
Accrued interest related to uncertain tax positions	2.2
Liability settlement with taxing authority	3.6
Income tax examination, interest expense	1.3
Withholding tax expense	15.7
Prepaid Taxes	18.8
Accrued Income Taxes	$ 11.1
Minimum
Income Tax Contingency [Line Items]
Income tax examination, refund period	2 months
Maximum
Income Tax Contingency [Line Items]
Income tax examination, refund period	6 months

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.1	$ 0.1	$ 0.2	$ 0.3
Interest cost	0.3	0.2	0.9	0.8
Amortization of net actuarial losses (gains)	(0.3)	(0.2)	(0.8)	(0.6)
Amortization of prior service cost	0.1	0.1	0.2	0.2
Net periodic benefit expense	0.2	0.2	0.5	0.7
U.S. pension benefits | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.1	1.1	3.2	3.3
Interest cost	1.6	1.4	4.9	4.3
Amortization of net actuarial losses (gains)	0.6	0.5	1.9	1.4
Amortization of prior service cost	0.1	0.1	0.2	0.2
Expected return on plan assets	(2.3)	(2.6)	(6.9)	(7.7)
Net periodic benefit expense	1.1	0.5	3.3	1.5
Non U.S. pension benefits | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.6	0.6	1.7	1.9
Interest cost	0.5	0.5	1.6	1.5
Amortization of net actuarial losses (gains)	0.6	0.7	1.8	2.1
Expected return on plan assets	0	0	(0.1)	0
Net periodic benefit expense	$ 1.7	$ 1.8	$ 5	$ 5.5

Derivative and Other Financia_3

Derivative and Other Financial Instruments (Narratives) (Details) € in Millions, gal in Millions, BTU in Trillions	9 Months Ended
	Sep. 30, 2019USD ($)BTUgalT	Sep. 30, 2019EUR (€)BTUgalT	Dec. 31, 2018USD ($)BTUgalT	Dec. 31, 2018EUR (€)BTUgalT	Oct. 31, 2018USD ($)
Derivative [Line Items]
Cash collateral posted	$ 0		$ 200,000
Zhenjiang Term Loans
Derivative [Line Items]
Maximum period for variable interest rate paid (in months)	6 months
Convertible Notes Payable | Measurement Input, Risk Free Interest Rate
Derivative [Line Items]
Expected equity volatility rate (percent)	0.019	0.019	0.026	0.026
Convertible Notes Payable | Measurement Input, Price Volatility
Derivative [Line Items]
Expected equity volatility rate (percent)	0.65	0.65	0.60	0.60
Metal
Derivative [Line Items]
Maximum settlement period of derivatives (in months)	3 months
Tons of metal in forward contracts with the right to buy (in tons) | T	147,100	147,100	165,000	165,000
Tons of metal in forward contracts with the right to sell (in tons) | T	301,500	301,500	293,000	293,000
Energy
Derivative [Line Items]
British thermal units in forward buy contracts (in British thermal units) | BTU	3.7	3.7	4.6	4.6
Gallons in diesel swap contracts (in gallons) | gal	2.6	2.6	4.3	4.3
Interest Rate Swap
Derivative [Line Items]
Derivative liability	$ 0
Interest Rate Swap | Term Loan Facility
Derivative [Line Items]
Euros in forward contracts					$ 700,000,000
Currency
Derivative [Line Items]
Euros in forward contracts | €		€ 67.1		€ 77.6

Derivative and Other Financia_4

Derivative and Other Financial Instruments (Schedule of Derivative Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Asset
Fair value	$ 20.3	$ 52.9
Effect of counterparty netting	(11.8)	(23.5)
Effect of cash collateral	0	0
Net derivatives as classified in the balance sheet	8.5	29.4
Liability
Fair value	(21.4)	(30.8)
Effect of counterparty netting	11.8	23.5
Cash collateral posted	0	0.2
Net derivatives as classified in the balance sheet	(9.6)	(7.1)
Metal
Asset
Fair value	20.1	52.3
Liability
Fair value	(13)	(24.3)
Energy
Asset
Fair value	0	0.2
Liability
Fair value	(1)	(1.6)
Interest rate
Asset
Fair value	0	0
Liability
Fair value	0	(0.4)
Currency
Asset
Fair value	0.2	0.4
Liability
Fair value	$ (7.4)	$ (4.5)

Derivative and Other Financia_5

Derivative and Other Financial Instruments (Schedule of Derivative Instruments in Balance Sheet by Contract Type) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Prepaid expenses and other current assets	$ 58	$ 62.7
Total Asset Derivatives	8.5	29.4
Accrued liabilities	191.5	198.1
Other long-term liabilities	71.6	46.1
Total Liability Derivatives	9.6	7.1
Metal
Derivatives, Fair Value [Line Items]
Prepaid expenses and other current assets	8.5	29.3
Accrued liabilities	0.6	0
Other long-term liabilities	0.8	1.2
Energy
Derivatives, Fair Value [Line Items]
Prepaid expenses and other current assets	0	0.1
Accrued liabilities	0.9	1.4
Other long-term liabilities	0.1	0
Interest rate
Derivatives, Fair Value [Line Items]
Accrued liabilities	0	0.4
Currency
Derivatives, Fair Value [Line Items]
Accrued liabilities	5.3	3
Other long-term liabilities	$ 1.9	$ 1.1

Derivative and Other Financia_6

Derivative and Other Financial Instruments (Schedule of Realized (Gains) Losses on Derivatives) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Metal
Derivative Instruments, Loss [Line Items]
Realized (gains) losses on derivative financial instruments	$ (13)	$ (17.2)	$ (46.1)	$ (15.2)
Energy
Derivative Instruments, Loss [Line Items]
Realized (gains) losses on derivative financial instruments	0.6	(0.1)	0.8	(0.4)
Currency
Derivative Instruments, Loss [Line Items]
Realized (gains) losses on derivative financial instruments	1.4	0.5	3.6	(0.3)
Interest rate
Derivative Instruments, Loss [Line Items]
Realized (gains) losses on derivative financial instruments	$ 0	$ 0	$ 0.5	$ 0

Derivative and Other Financia_7

Derivative and Other Financial Instruments (Schedule of Fair Value for Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Level 1 | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 44.7	$ 108.6
Restricted cash	6.8	7
Level 1 | Carrying Amount | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term Loan Facility	1,066.2	1,070.2
Level 1 | Carrying Amount | 2023 Junior Priority Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
2023 Junior Priority Notes	393.8	392.5
Level 1 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	44.7	108.6
Restricted cash	6.8	7
Level 1 | Fair Value | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term Loan Facility	1,088.3	1,088.2
Level 1 | Fair Value | 2023 Junior Priority Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
2023 Junior Priority Notes	422.5	410.1
Level 2 | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
ABL Facility	308.7	253.7
Level 2 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
ABL Facility	308.7	253.7
Level 3 | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchangeable Notes	44.7	44.6
Level 3 | Carrying Amount | Zhenjiang Term Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Zhenjiang Term Loans	145.7	157.2
Level 3 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchangeable Notes	60.7	60.7
Level 3 | Fair Value | Zhenjiang Term Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Zhenjiang Term Loans	$ 146.1	$ 157.6

Leases (Details)

Leases (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease expense	$ 1.2	$ 3.6
Finance lease expense
Amortization of right-of-use assets	1.4	3.7
Interest on lease liabilities	0.3	0.7
Total finance lease expense	1.7	4.4
Short term lease expense	$ 0.5	$ 1.5

Leases (Supplemental Cash Flow

Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ (1.2)	$ (3.7)
Operating cash flows from finance leases	(0.3)	(0.7)
Financing cash flows from finance leases	(1.2)	(3.6)
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	0.1	3.1
Finance leases	$ 1	$ 18.3

Leases (Supplemental Balance Sh

Leases (Supplemental Balance Sheet Information) (Details) $ in Millions	Sep. 30, 2019USD ($)
Operating leases
Operating lease, right-of-use asset	$ 10.5
Current operating lease liabilities	4.1
Long-term operating lease liabilities	7
Total operating lease liabilities	11.1
Finance leases
Finance lease right-of-use asset, gross	33
Finance lease right-of-use asset, accumulated amortization	(9.4)
Finance lease right-of-use asset, net	23.6
Current finance lease liabilities	4.4
Long-term finance lease liabilities	19.4
Total finance lease liabilities	$ 23.8
Weighted average remaining lease term
Operating leases	3 years 4 months 2 days
Finance leases	10 years 1 month 20 days
Weighted average discount rate
Operating leases	5.80%
Finance leases	6.00%

Leases (Maturity of Lease Liabi

Leases (Maturity of Lease Liabilities) (Details) $ in Millions	Sep. 30, 2019USD ($)
Operating Leases
2019 (excluding the nine months ended September 30, 2019)	$ 1.2
2020	4.4
2021	3.2
2022	1.4
2023	1.2
Thereafter	0.8
Total lease payments	12.2
Less imputed interest	(1.1)
Total	11.1
Finance Leases
2019 (excluding the nine months ended September 30, 2019)	1.6
2020	5.3
2021	3.8
2022	2.9
2023	2.4
Thereafter	17.2
Total lease payments	33.2
Less imputed interest	(9.4)
Total	$ 23.8

Potential Acquisition of Aler_2

Potential Acquisition of Aleris Corporation (Details) $ in Millions	Jan. 21, 2020USD ($)
Scenario, Forecast | Novelis, Inc. | Aleris Corporation
Business Acquisition [Line Items]
Total consideration transferred	$ 2,600

Condensed Consolidating Finan_3

Condensed Consolidating Financial Statements (Condensed Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 44.7			$ 108.6	$ 56.7
Accounts receivable, net	395.8			308.8
Inventories	752.4			772.9
Prepaid expenses and other current assets	58			62.7
Intercompany receivables	0			0
Total Current Assets	1,250.9			1,253
Property, plant and equipment, net	1,327.8			1,395
Intangible assets, net	31			32.5
Deferred income taxes	60.2			60.2
Other long-term assets	73.2			38.7
Investments in subsidiaries	0			0
Total Assets	2,743.1			2,779.4
Current Liabilities
Accounts payable	302.8			374.8
Accrued liabilities	191.5			198.1
Current portion of long-term debt	72.5			21.9
Intercompany payables	0			0
Total Current Liabilities	566.8			594.8
Long-term debt	1,886.6			1,906.4
Deferred revenue	55			65
Deferred income taxes	8.7			0.9
Accrued pension benefits	155.5			163.7
Accrued postretirement benefits	29.1			29.6
Other long-term liabilities	71.6			46.1
Total Long-Term Liabilities	2,206.5			2,211.7
Total equity	(30.2)	$ (33.8)	$ (63.2)	(27.1)	(0.8)	$ 32.4	$ 120.9	$ 92.7
Total Liabilities and Equity	2,743.1			2,779.4
Consolidated
Current Assets
Cash and cash equivalents	(1.6)			(0.7)	(2.3)
Accounts receivable, net	0			0
Inventories	0			0
Prepaid expenses and other current assets	0			0
Intercompany receivables	(194)			(979.2)
Total Current Assets	(195.6)			(979.9)
Property, plant and equipment, net	0			0
Intangible assets, net	0			0
Deferred income taxes	0			0
Other long-term assets	0			0
Investments in subsidiaries	(1,704.2)			(1,405.1)
Total Assets	(1,899.8)			(2,385)
Current Liabilities
Accounts payable	(1.6)			(0.7)
Accrued liabilities	0			0
Current portion of long-term debt	0			0
Intercompany payables	(194)			(979.2)
Total Current Liabilities	(195.6)			(979.9)
Long-term debt	0			0
Deferred revenue	0			0
Deferred income taxes	0			0
Accrued pension benefits	0			0
Accrued postretirement benefits	0			0
Other long-term liabilities	0			0
Total Long-Term Liabilities	0			0
Total equity	(1,704.2)			(1,405.1)
Total Liabilities and Equity	(1,899.8)			(2,385)
Aleris Corporation (Parent) | Eliminations
Current Assets
Cash and cash equivalents	0			0	0
Accounts receivable, net	0			0
Inventories	0			0
Prepaid expenses and other current assets	0			0
Intercompany receivables	0			0
Total Current Assets	0			0
Property, plant and equipment, net	0			0
Intangible assets, net	0			0
Deferred income taxes	0			0
Other long-term assets	0			0
Investments in subsidiaries	(30.2)			4.8
Total Assets	(30.2)			4.8
Current Liabilities
Accounts payable	0			0
Accrued liabilities	0			0
Current portion of long-term debt	0			0
Intercompany payables	0			31.9
Total Current Liabilities	0			31.9
Long-term debt	0			0
Deferred revenue	0			0
Deferred income taxes	0			0
Accrued pension benefits	0			0
Accrued postretirement benefits	0			0
Other long-term liabilities	0			0
Total Long-Term Liabilities	0			0
Total equity	(30.2)			(27.1)
Total Liabilities and Equity	(30.2)			4.8
Aleris International, Inc. | Eliminations
Current Assets
Cash and cash equivalents	15.9			32.5	4.2
Accounts receivable, net	0			0
Inventories	0			0
Prepaid expenses and other current assets	4.6			3.3
Intercompany receivables	101.1			628.1
Total Current Assets	121.6			663.9
Property, plant and equipment, net	1.3			0.9
Intangible assets, net	0			0
Deferred income taxes	0			0
Other long-term assets	13.1			8
Investments in subsidiaries	1,727.2			1,395.9
Total Assets	1,863.2			2,068.7
Current Liabilities
Accounts payable	3.5			5.9
Accrued liabilities	37.2			54
Current portion of long-term debt	55.7			11
Intercompany payables	74.2			308
Total Current Liabilities	170.6			378.9
Long-term debt	1,714			1,681.4
Deferred revenue	0			0
Deferred income taxes	0			0
Accrued pension benefits	0			0
Accrued postretirement benefits	0			0
Other long-term liabilities	8.8			3.6
Total Long-Term Liabilities	1,722.8			1,685
Total equity	(30.2)			4.8
Total Liabilities and Equity	1,863.2			2,068.7
Guarantor Subsidiaries | Eliminations
Current Assets
Cash and cash equivalents	0			0	0
Accounts receivable, net	182.7			133.5
Inventories	424.7			427.9
Prepaid expenses and other current assets	7.1			12
Intercompany receivables	88.1			333.6
Total Current Assets	702.6			907
Property, plant and equipment, net	824.2			860.9
Intangible assets, net	15.1			16.6
Deferred income taxes	0			0
Other long-term assets	21.6			3.9
Investments in subsidiaries	7.2			4.4
Total Assets	1,570.7			1,792.8
Current Liabilities
Accounts payable	154			199.4
Accrued liabilities	61.5			64.1
Current portion of long-term debt	0			1
Intercompany payables	93.7			589.2
Total Current Liabilities	309.2			853.7
Long-term debt	0			0.5
Deferred revenue	55			65
Deferred income taxes	0.3			0.1
Accrued pension benefits	41.6			44.9
Accrued postretirement benefits	29.1			29.6
Other long-term liabilities	29.6			14.9
Total Long-Term Liabilities	155.6			155
Total equity	1,105.9			784.1
Total Liabilities and Equity	1,570.7			1,792.8
Non-Guarantor Subsidiaries | Eliminations
Current Assets
Cash and cash equivalents	30.4			76.8	$ 54.8
Accounts receivable, net	213.1			175.3
Inventories	327.7			345
Prepaid expenses and other current assets	46.3			47.4
Intercompany receivables	4.8			17.5
Total Current Assets	622.3			662
Property, plant and equipment, net	502.3			533.2
Intangible assets, net	15.9			15.9
Deferred income taxes	60.2			60.2
Other long-term assets	38.5			26.8
Investments in subsidiaries	0			0
Total Assets	1,239.2			1,298.1
Current Liabilities
Accounts payable	146.9			170.2
Accrued liabilities	92.8			80
Current portion of long-term debt	16.8			9.9
Intercompany payables	26.1			50.1
Total Current Liabilities	282.6			310.2
Long-term debt	172.6			224.5
Deferred revenue	0			0
Deferred income taxes	8.4			0.8
Accrued pension benefits	113.9			118.8
Accrued postretirement benefits	0			0
Other long-term liabilities	33.2			27.6
Total Long-Term Liabilities	328.1			371.7
Total equity	628.5			616.2
Total Liabilities and Equity	$ 1,239.2			$ 1,298.1

Condensed Consolidating Finan_4

Condensed Consolidating Financial Statements (Condensed Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 856.8			$ 911.3			$ 2,650.5	$ 2,644.2
Cost of sales	744			845.6			2,349.1	2,414.6
Gross profit	112.8			65.7			301.4	229.6
Selling, general and administrative expenses	50.2			53.2			155.9	153.7
Restructuring charges	0.4			0.2			2	2
(Gains) losses on derivative financial instruments	(6.4)			(6.3)			(18.2)	(19)
Other operating expense, net	0.5			0.8			1.2	1.9
Operating income	68.1			17.8			160.5	91
Interest expense, net	39.1			37.5			118.9	106
Debt extinguishment costs	0			0			0	48.9
Other (income) expense, net	(0.9)			0.9			1.6	(10.2)
Equity in net earnings of affiliates	0			0			0	0
Income (loss) before income taxes	29.9			(20.6)			40	(53.7)
Provision for income taxes	5			5.4			23.9	14.7
Net income (loss)	24.9	$ 24.6	$ (33.4)	(26)	$ (46.9)	$ 4.6	16.1	(68.4)
Comprehensive income (loss)	0.6			(35.1)			(8.6)	(87.6)
Consolidated
Condensed Financial Statements, Captions [Line Items]
Revenues	(4.7)			(4.9)			(13.1)	(20.7)
Cost of sales	(4.7)			(4.9)			(13.1)	(20.7)
Gross profit	0			0			0	0
Selling, general and administrative expenses	0			0			0	0
Restructuring charges	0						0	0
(Gains) losses on derivative financial instruments	0			0			0	0
Other operating expense, net	0			0			0	0
Operating income	0			0			0	0
Interest expense, net	0			0			0	0
Debt extinguishment costs								0
Other (income) expense, net	0			0			0	0
Equity in net earnings of affiliates	56.4			(37)			54.5	(43)
Income (loss) before income taxes	(56.4)			37			(54.5)	43
Provision for income taxes	0			0			0	0
Net income (loss)	(56.4)			37			(54.5)	43
Comprehensive income (loss)	(7.9)			55.2			(5.1)	81.4
Aleris Corporation (Parent) | Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenues	0			0			0	0
Cost of sales	0			0			0	0
Gross profit	0			0			0	0
Selling, general and administrative expenses	0			0.1			0	0.1
Restructuring charges	0			0			0	0
(Gains) losses on derivative financial instruments	0			0			0	0
Other operating expense, net	0			0			0	0
Operating income	0			(0.1)			0	(0.1)
Interest expense, net	0			0			0	3.7
Debt extinguishment costs								0
Other (income) expense, net	0			0			0	11
Equity in net earnings of affiliates	(24.9)			25.9			(16.1)	53.6
Income (loss) before income taxes	24.9			(26)			16.1	(68.4)
Provision for income taxes	0			0			0	0
Net income (loss)	24.9			(26)			16.1	(68.4)
Comprehensive income (loss)	0.6			(35.1)			(8.6)	(87.6)
Aleris International, Inc. | Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenues	0			0			0	0
Cost of sales	0			0			0	0
Gross profit	0			0			0	0
Selling, general and administrative expenses	13.9			13.3			43.6	32
Restructuring charges	0			0			0	0
(Gains) losses on derivative financial instruments	0			0			0	0
Other operating expense, net	0			0			0	0
Operating income	(13.9)			(13.3)			(43.6)	(32)
Interest expense, net	1.2			5.1			4.2	6.7
Debt extinguishment costs								48.9
Other (income) expense, net	(9.6)			(4)			(28.3)	(25.2)
Equity in net earnings of affiliates	(30.5)			11.5			(35.7)	(8.9)
Income (loss) before income taxes	25			(25.9)			16.2	(53.5)
Provision for income taxes	0.1			0			0.1	0.1
Net income (loss)	24.9			(25.9)			16.1	(53.6)
Comprehensive income (loss)	0.6			(35)			(8.6)	(72.8)
Guarantor Subsidiaries | Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenues	496.6			532.5			1,527.4	1,471.9
Cost of sales	439.1			514			1,384.1	1,380.7
Gross profit	57.5			18.5			143.3	91.2
Selling, general and administrative expenses	15.9			17.9			49.3	52.8
Restructuring charges	0.3			0.3			1.7	1.3
(Gains) losses on derivative financial instruments	(12.9)			(7.3)			(24.2)	(23.3)
Other operating expense, net	0.5			0.8			1.2	1.9
Operating income	53.7			6.8			115.3	58.5
Interest expense, net	31			24.8			92.8	74.1
Debt extinguishment costs								0
Other (income) expense, net	8.2			2.7			24.6	8.1
Equity in net earnings of affiliates	(1)			(0.4)			(2.7)	(1.7)
Income (loss) before income taxes	15.5			(20.3)			0.6	(22)
Provision for income taxes	0.1			0.2			(0.3)	(0.6)
Net income (loss)	15.4			(20.5)			0.9	(21.4)
Comprehensive income (loss)	14.6			(20.7)			1.2	(21.5)
Non-Guarantor Subsidiaries | Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenues	364.9			383.7			1,136.2	1,193
Cost of sales	309.6			336.5			978.1	1,054.6
Gross profit	55.3			47.2			158.1	138.4
Selling, general and administrative expenses	20.4			21.9			63	68.8
Restructuring charges	0.1			(0.1)			0.3	0.7
(Gains) losses on derivative financial instruments	6.5			1			6	4.3
Other operating expense, net	0			0			0	0
Operating income	28.3			24.4			88.8	64.6
Interest expense, net	6.9			7.6			21.9	21.5
Debt extinguishment costs								0
Other (income) expense, net	0.5			2.2			5.3	(4.1)
Equity in net earnings of affiliates	0			0			0	0
Income (loss) before income taxes	20.9			14.6			61.6	47.2
Provision for income taxes	4.8			5.2			24.1	15.2
Net income (loss)	16.1			9.4			37.5	32
Comprehensive income (loss)	$ (7.3)			$ 0.5			$ 12.5	$ 12.9

Condensed Consolidating Finan_5

Condensed Consolidating Financial Statements (Condensed Cash Flow Statement) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	$ (26.3)	$ (67.4)
Investing activities
Payments for property, plant and equipment	(73.6)	(76.3)
Disbursements of intercompany loans		0
Repayments from intercompany loans		0
Equity contributions in subsidiaries	0	0
Return of investment in subsidiaries	0	0
Other	(0.7)	(0.6)
Net cash used by investing activities	(74.3)	(76.9)
Financing activities
Proceeds from revolving credit facilities	158.4	220.3
Payments on revolving credit facilities	(101.2)	(284.4)
Proceeds from senior secured notes, net of discount	0	1,483
Payments on term loan and notes, including premiums	(8.3)	(1,289.5)
Net payments on other long-term debt and finance leases	(10.6)	(8.6)
Debt issuance costs	0	(20.4)
Proceeds from intercompany loans		0
Repayments on intercompany loans		0
Proceeds from intercompany equity contributions	0	0
Dividends paid	0	0
Other	(0.1)	(0.2)
Net cash provided by financing activities	38.2	100.2
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(1.7)	(1.9)
Net decrease in cash, cash equivalents and restricted cash	(64.1)	(46)
Cash, cash equivalents and restricted cash at beginning of period	115.6	108
Cash, cash equivalents and restricted cash at end of period	51.5	62
Cash and cash equivalents			$ 44.7	$ 108.6	$ 56.7
Restricted cash (included in “Prepaid expenses and other current assets”)			6.8		5.3
Cash, cash equivalents and restricted cash	115.6	108	51.5	115.6	62
Eliminations | Aleris Corporation (Parent)
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	(31.8)	0.2
Investing activities
Payments for property, plant and equipment	0	0
Disbursements of intercompany loans		0
Repayments from intercompany loans		0
Equity contributions in subsidiaries	0	0
Return of investment in subsidiaries	31.8	0
Other	0	0
Net cash used by investing activities	31.8	0
Financing activities
Proceeds from revolving credit facilities	0	0
Payments on revolving credit facilities	0	0
Proceeds from senior secured notes, net of discount		0
Payments on term loan and notes, including premiums	0	0
Net payments on other long-term debt and finance leases	0	0
Debt issuance costs		0
Proceeds from intercompany loans		0
Repayments on intercompany loans		0
Proceeds from intercompany equity contributions	0	0
Dividends paid	0	0
Other	0	(0.2)
Net cash provided by financing activities	0	(0.2)
Effect of exchange rate differences on cash, cash equivalents and restricted cash	0	0
Net decrease in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Cash and cash equivalents			0	0	0
Restricted cash (included in “Prepaid expenses and other current assets”)			0		0
Cash, cash equivalents and restricted cash	0	0	0	0	0
Eliminations | Aleris International, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	265.2	(92.6)
Investing activities
Payments for property, plant and equipment	(1)	(0.2)
Disbursements of intercompany loans		0
Repayments from intercompany loans		0
Equity contributions in subsidiaries	(320.6)	(23.2)
Return of investment in subsidiaries	0	0
Other	0	0
Net cash used by investing activities	(321.6)	(23.4)
Financing activities
Proceeds from revolving credit facilities	125	125
Payments on revolving credit facilities	(45)	(205)
Proceeds from senior secured notes, net of discount		1,483
Payments on term loan and notes, including premiums	(8.3)	(1,289.5)
Net payments on other long-term debt and finance leases	(0.1)	0
Debt issuance costs		(19.5)
Proceeds from intercompany loans		25.4
Repayments on intercompany loans		(39.5)
Proceeds from intercompany equity contributions	0	0
Dividends paid	(31.8)	0
Other	0	0
Net cash provided by financing activities	39.8	79.9
Effect of exchange rate differences on cash, cash equivalents and restricted cash	0	0
Net decrease in cash, cash equivalents and restricted cash	(16.6)	(36.1)
Cash, cash equivalents and restricted cash at beginning of period	32.5	40.3
Cash, cash equivalents and restricted cash at end of period	15.9	4.2
Cash and cash equivalents			15.9	32.5	4.2
Restricted cash (included in “Prepaid expenses and other current assets”)			0		0
Cash, cash equivalents and restricted cash	32.5	40.3	15.9	32.5	4.2
Eliminations | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	(278.7)	35.3
Investing activities
Payments for property, plant and equipment	(39.4)	(45.3)
Disbursements of intercompany loans		0
Repayments from intercompany loans		0
Equity contributions in subsidiaries	(0.8)	(0.5)
Return of investment in subsidiaries	0	0.1
Other	(0.8)	(1.1)
Net cash used by investing activities	(41)	(46.8)
Financing activities
Proceeds from revolving credit facilities	0	0
Payments on revolving credit facilities	0	0
Proceeds from senior secured notes, net of discount		0
Payments on term loan and notes, including premiums	0	0
Net payments on other long-term debt and finance leases	(0.9)	(0.9)
Debt issuance costs		0
Proceeds from intercompany loans		0
Repayments on intercompany loans		0
Proceeds from intercompany equity contributions	320.6	13.7
Dividends paid	0	(2)
Other	0	0.7
Net cash provided by financing activities	319.7	11.5
Effect of exchange rate differences on cash, cash equivalents and restricted cash	0	0
Net decrease in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Cash and cash equivalents			0	0	0
Restricted cash (included in “Prepaid expenses and other current assets”)			0		0
Cash, cash equivalents and restricted cash	0	0	0	0	0
Eliminations | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	20.7	31.7
Investing activities
Payments for property, plant and equipment	(33.2)	(30.8)
Disbursements of intercompany loans		(25.4)
Repayments from intercompany loans		39.5
Equity contributions in subsidiaries	0	0
Return of investment in subsidiaries	0	0
Other	0.1	0.5
Net cash used by investing activities	(33.1)	(16.2)
Financing activities
Proceeds from revolving credit facilities	33.4	95.3
Payments on revolving credit facilities	(56.2)	(79.4)
Proceeds from senior secured notes, net of discount		0
Payments on term loan and notes, including premiums	0	0
Net payments on other long-term debt and finance leases	(9.6)	(7.7)
Debt issuance costs		(0.9)
Proceeds from intercompany loans		0
Repayments on intercompany loans		0
Proceeds from intercompany equity contributions	0.8	10
Dividends paid	(0.8)	(40)
Other	(0.1)	(0.7)
Net cash provided by financing activities	(32.5)	(23.4)
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(1.7)	(1.9)
Net decrease in cash, cash equivalents and restricted cash	(46.6)	(9.8)
Cash, cash equivalents and restricted cash at beginning of period	83.8	69.9
Cash, cash equivalents and restricted cash at end of period	37.2	60.1
Cash and cash equivalents			30.4	76.8	54.8
Restricted cash (included in “Prepaid expenses and other current assets”)			6.8		5.3
Cash, cash equivalents and restricted cash	83.8	69.9	37.2	83.8	60.1
Consolidated
Condensed Financial Statements, Captions [Line Items]
Net cash provided (used) by operating activities	(1.7)	(42)
Investing activities
Payments for property, plant and equipment	0	0
Disbursements of intercompany loans		25.4
Repayments from intercompany loans		(39.5)
Equity contributions in subsidiaries	321.4	23.7
Return of investment in subsidiaries	(31.8)	(0.1)
Other	0	0
Net cash used by investing activities	289.6	9.5
Financing activities
Proceeds from revolving credit facilities	0	0
Payments on revolving credit facilities	0	0
Proceeds from senior secured notes, net of discount		0
Payments on term loan and notes, including premiums	0	0
Net payments on other long-term debt and finance leases	0	0
Debt issuance costs		0
Proceeds from intercompany loans		(25.4)
Repayments on intercompany loans		39.5
Proceeds from intercompany equity contributions	(321.4)	(23.7)
Dividends paid	32.6	42
Other	0	0
Net cash provided by financing activities	(288.8)	32.4
Effect of exchange rate differences on cash, cash equivalents and restricted cash	0	0
Net decrease in cash, cash equivalents and restricted cash	(0.9)	(0.1)
Cash, cash equivalents and restricted cash at beginning of period	(0.7)	(2.2)
Cash, cash equivalents and restricted cash at end of period	(1.6)	(2.3)
Cash and cash equivalents			(1.6)	(0.7)	(2.3)
Restricted cash (included in “Prepaid expenses and other current assets”)			0		0
Cash, cash equivalents and restricted cash	$ (0.7)	$ (2.2)	$ (1.6)	$ (0.7)	$ (2.3)

Uncategorized Items - ars-20190

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 2,800,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 2,800,000