Ryerson Holding (RYI) 10-Q 1 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	RYI
Entity Registrant Name	RYERSON HOLDING CORPORATION
Entity Central Index Key	1,481,582
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		37,295,942

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net sales	$ 1,057.1	$ 875.4	$ 1,998.4	$ 1,689.9
Cost of materials sold	871.8	735	1,648.2	1,388.9
Gross profit	185.3	140.4	350.2	301
Warehousing, delivery, selling, general, and administrative	138.9	118.6	269.4	238
Operating profit	46.4	21.8	80.8	63
Other income and (expense), net	1.1	1	4.7	3.4
Interest and other expense on debt	(23.9)	(22.8)	(47.2)	(44.6)
Income before income taxes	23.6		38.3	21.8
Provision (benefit) for income taxes	6.2	(0.8)	10.3	6
Net income	17.4	0.8	28	15.8
Less: Net income (loss) attributable to noncontrolling interest	(0.1)	0.2	0.1	0.4
Net income attributable to Ryerson Holding Corporation	17.5	0.6	27.9	15.4
Comprehensive income	15.2	9.3	24.8	25.6
Less: Comprehensive income attributable to noncontrolling interest		0.2	0.2	0.7
Comprehensive income attributable to Ryerson Holding Corporation	$ 15.2	$ 9.1	$ 24.6	$ 24.9
Basic earnings per share	$ 0.47	$ 0.02	$ 0.75	$ 0.41
Diluted earnings per share	$ 0.46	$ 0.02	$ 0.74	$ 0.41

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income	$ 28	$ 15.8
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	23.1	22.2
Stock-based compensation	1.7	1.1
Deferred income taxes	8.2	6
Provision for allowances, claims, and doubtful accounts	1.4	0.4
Other-than-temporary impairment charge on equity investments		0.2
Non-cash (gain) loss from derivatives	(1.5)	0.5
Other items		(0.7)
Change in operating assets and liabilities:
Receivables	(127)	(101.4)
Inventories	(94.3)	(75.8)
Other assets	(0.9)	(1.8)
Accounts payable	145.5	68.7
Accrued liabilities	13.6	0.4
Accrued taxes payable/receivable	2.6	(1.1)
Deferred employee benefit costs	(18.3)	(16)
Net adjustments	(45.9)	(97.3)
Net cash used in operating activities	(17.9)	(81.5)
Investing activities:
Acquisitions, net of cash acquired	(16.2)	(49.2)
Capital expenditures	(21.4)	(10.2)
Proceeds from sale of property, plant, and equipment	0.4	3.7
Net cash used in investing activities	(37.2)	(55.7)
Financing activities:
Repayment of debt	(0.1)	(0.1)
Net proceeds of short-term borrowings	1.7	69.3
Purchase of subsidiary shares from noncontrolling interest	(0.2)
Credit facility amendment costs	(0.5)
Net increase in book overdrafts	8	45.4
Principal payments on capital lease obligations	(5.9)	(4.7)
Proceeds from sale-leaseback transactions	4.5	22.4
Net cash provided by financing activities	7.5	132.3
Net decrease in cash, cash equivalents, and restricted cash	(47.6)	(4.9)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(2.2)	1.4
Net change in cash, cash equivalents, and restricted cash	(49.8)	(3.5)
Cash, cash equivalents, and restricted cash—beginning of period	78.5	81.7
Cash, cash equivalents, and restricted cash—end of period	28.7	78.2
Cash paid during the period for:
Interest paid to third parties	43.9	41.5
Income taxes, net	0.9	1.3
Noncash investing activities:
Asset additions under capital leases and sale-leasebacks	9.4	$ 32.6
Asset additions under financing arrangements	$ 4.2

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 27.6	$ 77.4
Restricted cash	1.1	1.1
Receivables less provision for allowances, claims and doubtful accounts	505.6	376.3
Inventories	701.1	616.5
Prepaid expenses and other current assets	48.3	32.6
Total current assets	1,283.7	1,103.9
Property, plant, and equipment, at cost	777.9	742.7
Less: Accumulated depreciation	336.6	319.8
Property, plant and equipment, net	441.3	422.9
Deferred income taxes	8.4	17.9
Other intangible assets	45.9	46.9
Goodwill	120.3	115.3
Deferred charges and other assets	6.3	5
Total assets	1,905.9	1,711.9
Current liabilities:
Accounts payable	430.1	275
Salaries, wages, and commissions	48.3	40.3
Other accrued liabilities	74.6	58.4
Short-term debt	29.9	21.3
Current portion of deferred employee benefits	7.7	7.7
Total current liabilities	590.6	402.7
Long-term debt	1,023	1,024.4
Deferred employee benefits	221.8	243.5
Other noncurrent liabilities	49.3	48.7
Total liabilities	1,884.7	1,719.3
Commitments and contingencies
Ryerson Holding Corporation stockholders’ equity (deficit):
Preferred stock, value
Common stock, value	0.4	0.4
Capital in excess of par value	379.4	377.6
Accumulated deficit	(63.9)	(95.1)
Treasury stock at cost - Common stock, value	(6.6)	(6.6)
Accumulated other comprehensive loss	(290.6)	(286.3)
Total Ryerson Holding Corporation stockholders’ equity (deficit)	18.7	(10)
Noncontrolling interest	2.5	2.6
Total equity (deficit)	21.2	(7.4)
Total liabilities and equity	$ 1,905.9	$ 1,711.9

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Receivables, provision for allowances, claims and doubtful accounts	$ 2	$ 4.9
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	7,000,000	7,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	37,508,442	37,421,081
Treasury stock at cost - Common stock, shares	212,500	212,500

Financial Statements

Financial Statements	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Financial Statements	NOTE 1: FINANCIAL STATEMENTS Ryerson Holding Corporation (“Ryerson Holding”), a Delaware corporation, is the parent company of Joseph T. Ryerson & Son, Inc. (“JT Ryerson”), a Delaware corporation. Affiliates of Platinum Equity, LLC (“Platinum”) own approximately 21,037,500 shares of our common stock, which is approximately 56% of our issued and outstanding common stock. We are a leading value-added processor and distributor of industrial metals, with operations in the United States through JT Ryerson, in Canada through our indirect wholly-owned subsidiary Ryerson Canada, Inc., a Canadian corporation (“Ryerson Canada”), and in Mexico through our indirect wholly-owned subsidiary Ryerson Metals de Mexico, S. de R.L. de C.V., a Mexican corporation (“Ryerson Mexico”). In addition to our North American operations, we conduct materials distribution operations in China through an indirect wholly-owned subsidiary, Ryerson China Limited (“Ryerson China”). Unless the context indicates otherwise, Ryerson Holding, JT Ryerson, Ryerson Canada, Ryerson China, and Ryerson Mexico together with their subsidiaries, are collectively referred to herein as “Ryerson,” “we,” “us,” “our,” or the “Company.” Results of operations for any interim period are not necessarily indicative of results of any other periods or for the year. The condensed consolidated financial statements as of June 30, 2018 and for the three-month and six-month periods ended June 30, 2018 and 2017 are unaudited, but in the opinion of management, include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of results for such periods. The year-end condensed consolidated balance sheet data contained in this report was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2018
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	NOTE 2: RECENT ACCOUNTING PRONOUNCEMENTS Impact of Recently Issued Accounting Standards—Adopted In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “ Revenue from Contracts with Customers, Revenue from Contracts with Customers Revenue Recognition In January 2016, the FASB issued ASU 2016-01, “ Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities Technical corrections and improvements to Financial Instruments – Overall (Subtopic 825-10) – Recognition and Measurement of Financial Assets and Financial Liabilities . he amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. We adopted this guidance for our fiscal year beginning January 1, 2018. The adoption of this guidance resulted in a reclassification of $1.0 million from accumulated other comprehensive income to retained earnings. In August 2016, the FASB issued ASU 2016-15, “ Statement of Cash Flows – Classification of Certain Cash Receipts and Certain Cash Payments ”. The amendments address the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The update is effective for interim and annual reporting periods beginning after December 15, 2017. In October 2016, the FASB issued ASU 2016-16, “ Income Taxes – Intra-Entity Transfers of Assets Other Than Inventory ” . The adoption of this guidance did not have an impact on our consolidated financial statements. In November 2016, the FASB issued ASU 2016-18 “ Statement of Cash Flows – Restricted Cash using a retrospective transition method to each period presented The adoption of this guidance did not have a material impact on our consolidated financial statements. The previous disclosure for restricted cash within investing activities was removed and the beginning and ending balances of restricted cash are now included in the cash and cash-equivalents balances in our Condensed Consolidated Statements of Cash Flows. There was no impact on the cash flows from operations. See Note 3: Cash, Cash Equivalents, and Restricted Cash for additional required disclosures. In March 2017, the FASB issued ASU 2017-07, “ Compensation – Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post Retirement Benefit Cost . In May 2017, the FASB issued ASU 2017-09, “ Compensation – Stock Compensation: Scope of Modification Accounting Impact of Recently Issued Accounting Standards—Not Yet Adopted In February 2016, the FASB issued ASU 2016-02, “ Leases ” codified in ASC 842, “ Leases ”. The guidance requires lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. The amendment also will require disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative information. The update is effective for interim and annual reporting periods beginning after December 15, 2018. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, and have the option to use certain relief. Early adoption is permitted. The FASB recently proposed an optional transition alternative, currently subject to approval, which would allow for application of the guidance at the beginning of the period in which it is adopted, rather than at the beginning of the earliest comparative period presented. We will adopt this guidance for our fiscal year beginning January 1, 2019. The Company has established a cross-functional project team to implement the updated lease guidance and is in the process of evaluating existing contracts for embedded leases and implementing a lease software to be used for lease tracking and reporting. We are still assessing the impact of adoption on our consolidated financial statements and will assess the method of transition if the optional transition alternative is formally approved. In June 2016, the FASB issued ASU 2016-13, “ Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments ”. The amendment requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected, thus eliminating the probable initial recognition threshold and instead reflecting the current estimate of all expected credit losses. The amendment also requires that credit losses relating to available-for-sale debt securities be recorded through an allowance for credit losses rather than a write-down, thus enabling the ability to record reversals of credit losses in current period net income. The update is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted . In February 2018, the FASB issued ASU 2018-02, “ Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

Cash, Cash Equivalents, and Res

Cash, Cash Equivalents, and Restricted Cash	6 Months Ended
	Jun. 30, 2018
Cash And Cash Equivalents [Abstract]
Cash, Cash Equivalents, and Restricted Cash	NOTE 3: CASH, CASH EQUIVALENTS, AND RESTRICTED CASH The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the beginning and ending cash balances shown in the Condensed Consolidated Statements of Cash Flows: June 30, December 31, 2018 2017 (In millions) Cash and cash equivalents $ 27.6 $ 77.4 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 28.7 $ 78.5 We have cash restricted for purposes of covering letters of credit that can be presented for potential insurance claims.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2018
Inventory Disclosure [Abstract]
Inventories	NOTE 4: INVENTORIES The Company primarily uses the last-in, first-out (LIFO) method of valuing inventory. Interim LIFO calculations are based on actual inventory levels. Inventories, at stated LIFO value, were classified at June 30, 2018 and December 31, 2017 as follows: June 30, December 31, 2018 2017 (In millions) In process and finished products $ 701.1 $ 616.5 If current cost had been used to value inventories, such inventories would have been $15 million The Company has consignment inventory at certain customer locations, which totaled $8.2 million and $8.9 million at June 30, 2018 and December 31, 2017, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 5: GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill, which represents the excess of cost over the fair value of net assets acquired, amounted to $120.3 million and $115.3 million Intangibles – Goodwill and Other, October 1, 2017, and it Other intangible assets with finite useful lives continue to be amortized over their useful lives. During the first six months of 2018 and 2017, we recognized $2.1 million and $12.2 million, respectively, in intangibles related to the acquisitions discussed in Note 6: Acquisitions. We review the recoverability of our long-lived assets whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Acquisitions	NOTE 6: ACQUISITIONS On April 2, 2018, Ryerson Holding acquired Fanello Industries, LLC (“Fanello”), a privately owned metal service company located in Lavonia, Georgia. The acquisition is not material to our consolidated financial statements. On January 19, 2017, Ryerson Holding acquired The Laserflex Corporation (“Laserflex”), a privately-owned metal fabricator specializing in laser fabrication metal processing and welding with locations in Columbus, Ohio and Wellford, South Carolina. The acquisition is not material to our consolidated financial statements. On February 15, 2017, Ryerson Holding acquired Guy Metals, Inc. (“Guy Metals”), . The acquisition is not material to our consolidated financial statements.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 7: LONG-TERM DEBT Long-term debt consisted of the following at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 (In millions) Ryerson Credit Facility $ 384.8 $ 384.2 11.00% Senior Secured Notes due 2022 650.0 650.0 Foreign debt 22.5 21.3 Other debt 8.0 3.9 Unamortized debt issuance costs and discounts (12.4 ) (13.7 ) Total debt 1,052.9 1,045.7 Less: Short-term foreign debt 22.5 21.3 Less: Other short-term debt 7.4 — Total long-term debt $ 1,023.0 $ 1,024.4 Ryerson Credit Facility O n November 16, 2016, Ryerson entered into an amendment with respect to its $1.0 billion revolving credit facility, to reduce the total facility size from $1.0 billion to $750 million (as amended, the “Old Credit Facility”), reduce the interest rate on outstanding borrowings by 25 basis points, reduce commitment fees on amounts not borrowed by 2.5 basis points, and to extend the maturity date to November 16, 2021. On June 28, 2018, Ryerson entered into a second amendment with respect to the revolving credit facility to increase the facility size from $750 million to $1 billion (as amended, the “Ryerson Credit Facility”). At June 30, 2018 , Ryerson had $384.8 million of outstanding borrowings, $12 million of letters of credit issued, and $363 million available under The Ryerson Credit Facility has an allocation of $940 million to the Company’s subsidiaries in the United States and an allocation of $60 million to Ryerson Holding’s Canadian subsidiary that is a borrower. Amounts outstanding under the Ryerson Ryerson We attempt to minimize interest rate risk exposure through the utilization of interest rate swaps, which are derivative financial instruments. In March 2017, we entered into an interest rate swap to fix interest on $150 million of our floating rate debt under the Ryerson Credit Facility at a rate of 1.658% through March 2020. The swap has reset dates and critical terms that match our existing debt and the anticipated critical terms of future debt. The weighted average interest rate on the outstanding borrowings under the Ryerson Credit Facility including the interest rate swap was 3.2 percent and 2.8 percent at June 30, 2018 and December 31, 2017, respectively. Borrowings under the Ryerson The Ryerson Ryerson Ryerson The Ryerson Ryerson Ryerson The lenders under the Ryerson Ryerson Net proceeds of short-term borrowings that are reflected in the Condensed Consolidated Statements of Cash Flows represent borrowings under the Ryerson 2022 Notes On May 24, 2016, JT Ryerson issued $650 million in aggregate principal amount of the 2022 Notes (the “2022 Notes”). The 2022 Notes bear interest at a rate of 11.00% per annum. The 2022 Notes are fully and unconditionally guaranteed on a senior secured basis by all of our existing and future domestic subsidiaries that are co-borrowers or that have guarantee obligations under the Ryerson Credit Facility. The 2022 Notes and the related guarantees are secured by a first-priority security interest in substantially all of JT Ryerson’s and each guarantor’s present and future assets located in the United States (other than receivables, inventory, cash, deposit accounts and related general intangibles, certain other assets, and proceeds thereof), subject to certain exceptions and customary permitted liens. The 2022 Notes and the related guarantees are also secured on a second-priority basis by a lien on the assets that secure JT Ryerson’s and the Company’s obligations under the Ryerson Credit Facility. The 2022 Notes will be redeemable, in whole or in part, at any time on or after May 15, 2019 at certain redemption prices. The redemption price for the 2022 Notes if redeemed during the twelve months beginning (i) May 15, 2019 is 105.50%, (ii) May 15, 2020 is 102.75%, and (iii) May 15, 2021 and thereafter is 100.00%. JT Ryerson may redeem some or all of the 2022 Notes before May 15, 2019 at a redemption price of 100.00% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date, plus a “make-whole” premium. In addition, JT Ryerson may redeem up to 35% of the 2022 Notes before May 15, 2019 with respect to the 2022 Notes with the net cash proceeds from certain equity offerings at a price equal to 111.00%, with respect to the 2022 Notes, of the principal amount thereof, plus any accrued and unpaid interest, if any. JT Ryerson may be required to make an offer to purchase the 2022 Notes upon the sale of assets or upon a change of control. The 2022 Notes contain customary covenants that, among other things, limit, subject to certain exceptions, our ability, and the ability of our restricted subsidiaries, to incur additional indebtedness, pay dividends on our capital stock or repurchase our capital stock, make investments, sell assets, engage in acquisitions, mergers, or consolidations, or create liens or use assets as security in other transactions. Subject to certain exceptions, JT Ryerson may only pay dividends to Ryerson Holding to the extent of 50% of future net income, once prior losses are offset. Foreign Debt At June 30, 2018, Ryerson China’s foreign borrowings were $22.5 million, which were owed to banks in Asia at a weighted average interest rate of 4.1% per annum and secured by inventory and property, plant, and equipment. At December 31, 2017, Ryerson China’s foreign borrowings were $21.3 million rate of 3.7% Availability under the foreign credit lines was $23 million and $25 million at June 30, 2018 and December 31, 2017. Letters of credit issued by our foreign subsidiaries were

Employee Benefits

Employee Benefits	6 Months Ended
	Jun. 30, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefits	NOTE 8: EMPLOYEE BENEFITS The following table summarizes the components of net periodic benefit (credit) cost for the three and six month periods ended June 30, 2018 and 2017 for the Ryerson pension plans and postretirement benefits other than pension: Three Months Ended June 30, Pension Benefits Other Benefits 2018 2017 2018 2017 (In millions) Components of net periodic benefit (credit) cost Service cost $ — $ 1 $ — $ — Interest cost 6 6 — — Expected return on assets (10 ) (11 ) — — Recognized actuarial (gain) loss 4 4 (2 ) (2 ) Net periodic benefit credit $ — $ — $ (2 ) $ (2 ) Six Months Ended June 30, Pension Benefits Other Benefits 2018 2017 2018 2017 (In millions) Components of net periodic benefit (credit) cost Service cost $ — $ 1 $ — $ — Interest cost 12 13 1 1 Expected return on assets (20 ) (21 ) — — Recognized actuarial (gain) loss 8 7 (4 ) (4 ) Amortization of prior service credit — — (1 ) (1 ) Net periodic benefit credit $ — $ — $ (4 ) $ (4 ) The Company has contributed $12 million to the pension plan fund through the six months ended June 30, 2018 and anticipates that it will have a minimum required pension contribution funding of approximately $15 million for the remaining six months of 2018.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 9: COMMITMENTS AND CONTINGENCIES In October 2011, the United States Environmental Protection Agency (the “EPA”) named us as one of more than 100 businesses that may be a potentially responsible party for the Portland Harbor Superfund Site (the “PHS Site”). On January 6, 2017, the EPA issued its Record of Decision (“ROD”) regarding the site. The ROD includes a combination of dredging, capping and enhanced natural recovery that would take approximately thirteen years to construct plus additional time for monitored natural recovery, at an estimated present value cost of $1.05 billion. The EPA has now requested a Pre-Remedial Design Report (“Pre-RD”) to help determine if the ROD is appropriate or should be reduced. The Pre-RD is due on May 9, 2019, and a revised ROD should be issued sometime thereafter. The EPA has not yet allocated responsibility for the contamination among the potentially responsible parties, including JT Ryerson. We do not currently have sufficient information available to us to determine whether the ROD will be executed as currently stated, whether and to what extent JT Ryerson may be held responsible for any of the identified contamination, and how much (if any) of the final plan’s costs might ultimately be allocated to JT Ryerson. Therefore, management cannot predict the ultimate outcome of this matter or estimate a range of potential loss at this time. There are various other claims and pending actions against the Company. The amount of liability, if any, for those claims and actions at June 30, 2018 is not determinable but, in the opinion of management, such liability, if any, will not have a material adverse effect on the Company’s financial position, results of operations, or cash flows. We maintain liability insurance coverage to assist in protecting our assets from losses arising from or related to activities associated with business operations.

Derivatives and Fair Value Meas

Derivatives and Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
Investments All Other Investments [Abstract]
Derivatives and Fair Value Measurements	NOTE 10: DERIVATIVES AND FAIR VALUE MEASUREMENTS Derivatives The Company is exposed to certain risks relating to its ongoing business operations. The primary risks managed by using derivative instruments are interest rate risk, foreign currency risk, and commodity price risk. Interest rate swaps are entered into to manage interest rate risk associated with the Company’s floating-rate borrowings. We use foreign currency exchange contracts to hedge variability in cash flows when a payment currency is different from our functional currency. From time to time, we may enter into fixed price sales contracts with our customers for certain of our inventory components. We may enter into metal commodity futures and options contracts to reduce volatility in the price of these metals. We may also enter into natural gas and diesel fuel price swaps to manage the price risk of forecasted purchases of natural gas and diesel fuel. We have a receive variable, pay fixed, interest rate swap to manage the exposure to variable interest rates of the Ryerson Credit Facility. In March 2017, we entered into a forward agreement for $150 million of “pay fixed” interest at 1.658%, “receive variable” interest to manage the risk of increasing variable interest rates. The interest rate reset dates and critical terms match the terms of our existing debt and anticipated critical terms of future debt under the Ryerson Credit Facility. The fair value of the interest rate swap as of June 30, 2018 was an asset of $2.2 million. The Company currently does not account for its commodity contracts and foreign exchange derivative contracts as hedges but rather marks them to market with a corresponding offset to current earnings. The Company accounts for its interest rate swap as a cash flow hedge of floating-rate borrowings with changes in fair value being recorded in accumulated other comprehensive income. The Company regularly reviews the creditworthiness of its derivative counterparties and does not expect to incur a significant loss from the failure of any counterparties to perform under any agreements. The following table summarizes the location and fair value amount of our derivative instruments reported in our Condensed Consolidated Balance Sheets as of June 30, 2018 and December 31, 2017: Asset Derivatives Liability Derivatives Balance Sheet Location June 30, 2018 December 31, 2017 Balance Sheet Location June 30, 2018 December 31, 2017 (In millions) Derivatives not designated as hedging instruments under ASC 815 Metal commodity contracts Prepaid expenses and other current assets $ 2.6 $ 2.8 Other accrued liabilities $ 2.3 $ 3.9 Foreign exchange contracts Prepaid expenses and other current assets 0.2 0.1 Other accrued liabilities — — Derivatives designated as hedging instruments under ASC 815 Interest rate swaps Deferred charges and other assets 2.2 1.0 Other noncurrent liabilities — — Total derivatives $ 5.0 $ 3.9 $ 2.3 $ 3.9 As of June 30, 2018 and December 31, 2017, the Company’s foreign currency exchange contracts had a U.S. dollar notional amount of $7.0 million and $5.1 million tons The following table summarizes the location and amount of gains and losses on derivatives not designated as hedging instruments reported in our Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2018 and 2017: Amount of Gain/(Loss) Recognized in Income on Derivatives Derivatives not designated as hedging instruments Location of Gain/(Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, under ASC 815 on Derivatives 2018 2017 2018 2017 (In millions) Metal commodity contracts Cost of materials sold $ 1.7 $ 0.5 $ 1.3 $ 1.8 Foreign exchange contracts Other income and (expense), net (0.1 ) (0.1 ) 0.1 (0.1 ) Total $ 1.6 $ 0.4 $ 1.4 $ 1.7 The following table summarizes the location and amount of gains and losses on derivatives designated as hedging instruments reported in our Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2018 and 2017: Amount of Gain/(Loss) Reclassified from Accumulated Other Comprehensive Income into Income Derivatives designated as hedging instruments Location of Gain/(Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, under ASC 815 on Derivatives 2018 2017 2018 2017 (In millions) Interest rate swaps Interest and other expense on debt $ 0.1 $ (0.3 ) $ 0.1 $ (0.4 ) As of June 30, 2018, the portion of the interest rate swap fair value that would be reclassified into earnings during the next 12 months as interest income is approximately $1.1 million. Fair Value Measurements To increase consistency and comparability in fair value measurements, ASC 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows: 1. Level 1 – quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access as of the reporting date. 2. Level 2 – inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data. 3. Level 3 – unobservable inputs, such as internally-developed pricing models for the asset or liability due to little or no market activity for the asset or liability. The following table presents assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheet on a recurring basis and their level within the fair value hierarchy as of June 30, 2018: At June 30, 2018 Level 1 Level 2 Level 3 (In millions) Assets Prepaid expenses and other current assets: Equity securities $ 0.1 $ — $ — Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.6 $ — Foreign exchange contracts — 0.2 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 2.2 — Total derivatives $ — $ 5.0 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.3 $ — The following table presents assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheet on a recurring basis and their level within the fair value hierarchy as of December 31, 2017: At December 31, 2017 Level 1 Level 2 Level 3 (In millions) Assets Prepaid expenses and other current assets: Equity securities $ 0.1 $ — $ — Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.8 $ — Foreign exchange contracts — 0.1 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 1.0 — Total derivatives $ — $ 3.9 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 3.9 $ — The fair value of each derivative contract is determined using Level 2 inputs and the market approach valuation technique, as described in ASC 820. The Company has various commodity derivatives to lock in nickel and zinc prices for varying time periods. The fair value of these derivatives is determined based on the spot price each individual contract was purchased at and compared with the one-month daily average actual spot price on the London Metals Exchange for nickel and zinc on the valuation date. The Company also has commodity derivatives to lock in hot roll coil, iron ore, and aluminum prices for varying time periods. The fair value of hot roll coil, iron ore, and aluminum derivatives is determined based on the spot price each individual contract was purchased at and compared with the one-month daily average actual spot price on the Chicago Mercantile Exchange, the Singapore Exchange, and the London Metals Exchange, respectively, for the commodity on the valuation date. In addition, the Company has numerous foreign exchange contracts to hedge variability in cash flows when a payment currency is different from our functional currency. The Company defines the fair value of foreign exchange contracts as the amount of the difference between the contracted and current market value at the end of the period. The Company estimates the current market value of foreign exchange contracts by obtaining month-end market quotes of foreign exchange rates and forward rates for contracts with similar terms. The Company uses the exchange rates provided by Reuters. Each commodity and foreign exchange contract term varies in the number of months, but in general, contracts are between 3 to 12 months The carrying and estimated fair values of our financial instruments at June 30, 2018 and December 31, 2017 were as follows: At June 30, 2018 At December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 27.6 $ 27.6 $ 77.4 $ 77.4 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provision for allowances, claims, and doubtful accounts 505.6 505.6 376.3 376.3 Accounts payable 430.1 430.1 275.0 275.0 Long-term debt, including current portion 1,052.9 1,122.1 1,045.7 1,125.9 The estimated fair value of the Company’s cash and cash equivalents, receivables less provision for allowances, claims, and doubtful accounts, and accounts payable approximate their carrying amounts due to the short-term nature of these financial instruments. The estimated fair value of the Company’s long-term debt and the current portions thereof is determined by using quoted market prices of Company debt securities (Level 2 inputs). Equity Securities The Company had $0.1 million of equity securities, classified within “Prepaid expenses and other current assets,” as of June 30, 2018 and December 31, 2017. Subsequent to the adoption of ASU 2016-01, management values these investments at fair value with changes in fair value recognized in other income (expense), net. The amount of gain (loss) recognized in the Condensed Consolidated Statement of Comprehensive Income in the three and six month periods ended June 30, 2018 was zero. Prior to the adoption of ASU 2016-01, management valued these investments at fair value with changes in fair value recognized in accumulated other comprehensive income. The balance of $1.0 million outstanding within accumulated other comprehensive income related to these investments at December 31, 2017 was reclassed to retained earnings upon the adoption of ASU 2016-01. There is no maturity date for these investments. Sales during the six months ended June 30, 2018 were immaterial.

Stockholders' Equity (Deficit),

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	NOTE 11: STOCKHOLDERS’ EQUITY (DEFICIT), ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), AND NONCONTROLLING INTEREST The following table details changes in these accounts: Ryerson Holding Corporation Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Accumulated Deficit Foreign Currency Translation Benefit Plan Liabilities Unrealized Gain (Loss) on Equity Securities Cash Flow Hedge- Interest Rate Swap Non-controlling Interest Total Equity Shares Dollars Shares Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars (In millions, except shares in thousands) Balance at January 1, 2018 37,421 $ 0.4 213 $ (6.6 ) $ 377.6 $ (95.1 ) $ (41.6 ) $ (246.3 ) $ 1.0 $ 0.6 $ 2.6 $ (7.4 ) Net income — — — — — 27.9 — — — — 0.1 28.0 Foreign currency translation — — — — — — (3.8 ) — — — 0.1 (3.7 ) Foreign currency loss on intra-entity transactions — — — — — — (2.3 ) — — — — (2.3 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.7 — — — — — — — 1.9 — — — 1.9 Adoption of accounting principal ASU 2016-01 — — — — — 1.0 — — (1.0 ) — — — Adoption of accounting principal ASC 606, net of tax of $0.7 — — — — — 2.3 — — — — — 2.3 Stock-based compensation expense 87 — — — 1.7 — — — — — — 1.7 Purchase of subsidiary shares from noncontrolling interest — — — — 0.1 — — — — — (0.3 ) (0.2 ) Cash flow hedge - interest rate swap, net of tax of $0.3 — — — — — — — — — 0.9 — 0.9 Balance at June 30, 2018 37,508 $ 0.4 213 $ (6.6 ) $ 379.4 $ (63.9 ) $ (47.7 ) $ (244.4 ) $ — $ 1.5 $ 2.5 $ 21.2 The following table details changes in accumulated other comprehensive income (loss), net of tax, for the six months ended June 30, 2018: Changes in Accumulated Other Comprehensive Income (Loss) by Component, net of tax Foreign Currency Translation Benefit Plan Liabilities Cash Flow Hedge - Interest Rate Swap (In millions) Balance at January 1, 2018 $ (41.6 ) $ (246.3 ) $ 0.6 Other comprehensive income (loss) before reclassifications (6.1 ) — 1.0 Amounts reclassified from accumulated other comprehensive income into net income — 1.9 (0.1 ) Net current-period other comprehensive income (loss) (6.1 ) 1.9 0.9 Balance at June 30, 2018 $ (47.7 ) $ (244.4 ) $ 1.5 The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2018: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Six Months Ended Affected line item in the Condensed Details about Accumulated Other June 30, 2018 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Cash flow hedge - interest rate swap Realized swap interest income $ (0.1 ) $ (0.1 ) Interest and other expense on debt Tax provision — — Net of tax $ (0.1 ) $ (0.1 ) Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial loss $ 2.1 $ 4.1 Warehousing, delivery, selling, general, and administrative Prior service credits (0.8 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax 1.3 2.6 Tax benefit (0.4 ) (0.7 ) Net of tax $ 0.9 $ 1.9 The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2017: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Six Months Ended Affected line item in the Condensed Details about Accumulated Other June 30, 2017 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Other-than-temporary impairment Other-than-temporary impairment charge $ 0.2 $ 0.2 Other income and (expense), net Tax benefit (0.1 ) (0.1 ) Net of tax $ 0.1 $ 0.1 Cash flow hedge - interest rate swap Realized swap interest loss $ 0.3 $ 0.4 Interest and other expense on debt Tax benefit (0.1 ) (0.1 ) Net of tax $ 0.2 $ 0.3 Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial gain $ (3.7 ) $ (2.1 ) Warehousing, delivery, selling, general, and administrative Prior service credits (0.7 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax (4.4 ) (3.6 ) Tax provision 1.7 1.4 Net of tax $ (2.7 ) $ (2.2 )

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2018
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 12: REVENUE RECOGNITION We are a leading metals service center that distributes and provides value-added processing of industrial metals with operations in the United States, Canada, Mexico, and China. We purchase large quantities of metal products from primary producers and sell these materials in smaller quantities to a wide variety of metals-consuming industries. More than 75% of the metals products sold are processed by us by burning, sawing, slitting, blanking, cutting to length, or other techniques. Revenue Accounting Policy In May 2014, the FASB issued ASC 606 which supersedes the revenue recognition requirements in ASC 605, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted ASC $12.3 million. The net impact on retained earnings associated with these revenues was $2.3 million. ASC “ Impacts on Financial Statements Periods prior to January 1, 2018 Revenue is recognized in accordance with ASC 605. Revenue is recognized upon delivery of product to customers and is recorded net of returns, allowances, customer discounts, and incentives. Sales taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis. Periods commencing January 1, 2018 Revenue is recognized based on the consideration expected to be received for delivery of as-is or processed metal products when, or as, the Company satisfies its contractual obligation to transfer control of a product to a customer, which we refer to as a performance obligation. Predominately all of our contracts contain a single performance obligation. The majority of our revenue is recognized at a point in time. The Company has determined that the most definitive demonstration that control has transferred to a customer is physical delivery, with the exception of bill and hold and consignment transactions. The Company’s bill-and-hold transactions are arrangements where a customer requests that we bill them for a product even though we retain physical possession of the product until it is subsequently delivered to the customer. Bill and hold revenue is recorded when all of the criteria within ASC Revenues associated with products which we believe have no alternative use, and where the Company has an enforceable right to payment, are recognized on an over time basis . Products with no alternative use include products made from unique alloys, custom extrusions, non-standard gauges, items that been processed to a custom size that cannot be cost effectively reworked to a standard size, or items processed to customer specific drawings or specifications. Over-time revenues Ryerson uses both input and output methods of measuring progress towards completion based on the type and extent of processing completed. Input methods are used for complex processing with multiple steps occurring over multiple days. Under the input method, the measure of performance, commonly called percentage of completion, is t he ratio of costs incurred to date to the total estimated costs at completion for the products. Significant judgment is required in determining which products qualify for over time revenue recognition, the methodology to be used in calculating the progress toward completion, and estimating the costs incurred to date and the total cost at completion. Revenue is recorded net of returns, allowances, customer discounts, and incentives. Sales taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis. Prices are generally fixed at the time of order confirmation. At each quarter end, the Company calculates an estimate of potential cash discounts and returns and allowances that could be taken by customers that are associated with outstanding accounts receivable, as well as estimates of customer rebates. Cash discounts and returns and allowances are calculated based on historical experience. Customer rebates are estimated based on actual sales and projections over the rebate period. The Company has elected to treat shipping and handling costs as an activity necessary to fulfill the performance obligation to transfer product to the customer and not as a separate performance obligation. Shipping and handling costs are estimated at quarter end in proportion to revenue recognized for transactions where actual costs are not yet known. Shipping and handling costs are included in Warehousing, delivery, selling, general, and administrative expense. The balance recognized related to shipping and handling costs was a net contract liability of $0.1 million as of June 30, 2018. The Company’s performance obligations are typically short-term in nature. As a result, the Company has elected the practical expedient that provides an exemption of the disclosure requirements regarding information about remaining performance obligations on contracts that have original expected durations of one year or less. Disaggregated Revenue We have one operating and reportable segment, metals service centers. The Company derives substantially all of its sales from the distribution of metals. The following table shows the Company’s percentage of sales by major product line: Three Months Ended Six Months Ended June 30, June 30, Product Line 2018 2017 2018 2017 Carbon Steel Flat 28 % 28 % 27 % 28 % Carbon Steel Plate 11 10 11 10 Carbon Steel Long 12 12 12 12 Stainless Steel Flat 17 18 17 18 Stainless Steel Plate 4 4 4 4 Stainless Steel Long 4 4 4 4 Aluminum Flat 16 15 16 15 Aluminum Plate 3 3 3 3 Aluminum Long 4 4 4 4 Other 1 2 2 2 Total 100 % 100 % 100 % 100 % A significant majority of the Company’s sales are attributable to its U.S. operations. The only operations attributed to foreign countries relate to the Company’s subsidiaries in Canada, China, and Mexico. The following table summarizes consolidated financial information of our operations by geographic location based on where sales originated: Three Months Ended June 30, Six Months Ended June 30, Net Sales 2018 2017 2018 2017 (In millions) United States $ 938.7 $ 773.6 $ 1,774.0 $ 1,491.6 Foreign countries 118.4 101.8 224.4 198.3 Total $ 1,057.1 $ 875.4 $ 1,998.4 $ 1,689.9 As stated above, revenue is recognized either at a point in time or over time based on the type of product that is being sold to the customer with products that are determined to have no alternative use being recognized over time. The following table summarizes revenues by the type of item sold: Timing of Revenue Recognition Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Revenue on products with an alternative use 88 % 89 % Revenue on products with no alternative use 12 11 Total 100 % 100 % Contract Balances A receivable is recognized in the period in which an invoice is issued, which is generally when the product is delivered to the customer. Payment terms on invoiced amounts are typically 30 days from the invoice date. We do not have any contracts with significant financing components. Receivables, which are included in accounts receivables within the Condensed Consolidated Balance Sheet, from contracts with customers were $507.6 million and $381.2 million as of June 30, 2018 and at the adoption of ASC 606, respectively. Contract assets, which consist primarily of revenues recognized over time that have not yet been invoiced and estimates of the value of inventory that will be received in conjunction with product returns changes in the contract assets and the contract liabilities balances during the period are as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Contract Assets Contract Liabilities Contract Assets Contract Liabilities (In millions) (In millions) Beginning Balance $ 14.6 $ 4.3 $ 14.2 $ 3.9 Transferred to receivables from contract assets recognized at January 1, 2018 (1.7 ) — (11.8 ) — Satisfied contract liability from beginning of the period — (0.1 ) — (0.3 ) Net contract assets and liabilities added for products with no alternative during the period 0.5 0.2 9.0 0.2 Contract assets and liabilities acquired 0.3 — 0.3 — Changes to reserves 3.1 (0.3 ) 3.3 (1.5 ) Reclass from contract liability to contract asset — — 1.8 1.8 Ending Balance $ 16.8 $ 4.1 $ 16.8 $ 4.1 Impacts on Financial Statements The following table summarizes the impacts of adopting ASC Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported ASC 606 Adjustments Balances without adoption of ASC 606 As Reported ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Net sales $ 1,057.1 $ 1.1 $ 1,058.2 $ 1,998.4 $ 2.7 $ 2,001.1 Cost of materials sold 871.8 1.9 873.7 1,648.2 3.7 1,651.9 Gross profit 185.3 (0.8 ) 184.5 350.2 (1.0 ) 349.2 Warehousing, delivery, selling, general, and administrative 138.9 (0.1 ) 138.8 269.4 0.1 269.5 Operating profit 46.4 (0.7 ) 45.7 80.8 (1.1 ) 79.7 Other income and (expense), net 1.1 — 1.1 4.7 — 4.7 Interest and other expense on debt (23.9 ) — (23.9 ) (47.2 ) — (47.2 ) Income before income taxes 23.6 (0.7 ) 22.9 38.3 (1.1 ) 37.2 Provision for income taxes 6.2 (0.2 ) 6.0 10.3 (0.3 ) 10.0 Net income 17.4 (0.5 ) 16.9 28.0 (0.8 ) 27.2 Less: Net income attributable to noncontrolling interest (0.1 ) — (0.1 ) 0.1 — 0.1 Net income attributable to Ryerson Holding Corporation $ 17.5 $ (0.5 ) $ 17.0 $ 27.9 $ (0.8 ) $ 27.1 Basic earnings per share $ 0.47 $ (0.02 ) $ 0.45 $ 0.75 $ (0.02 ) $ 0.73 Diluted earnings per share $ 0.46 $ (0.01 ) $ 0.45 $ 0.74 $ (0.02 ) $ 0.72 The following table summarizes the impacts of adopting ASC As reported June 30, 2018 ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Operating activities: Net income $ 28.0 $ (0.8 ) $ 27.2 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Deferred income taxes $ 8.2 $ (0.3 ) 7.9 Other non cash adjustments 24.7 — 24.7 Change in operating assets and liabilities: Receivables (127.0 ) — (127.0 ) Inventories (94.3 ) 3.7 (90.6 ) Other assets (0.9 ) (2.7 ) (3.6 ) Accounts payable 145.5 — 145.5 Accrued liabilities 13.6 0.1 13.7 Accrued taxes payable/receivable 2.6 — 2.6 Deferred employee benefit costs (18.3 ) — (18.3 ) Net adjustments (45.9 ) 0.8 (45.1 ) Net cash used in operating activities (17.9 ) — (17.9 ) The following table summarizes the impacts of adopting ASC 606 on the Company’s current year Condensed Consolidated Balance Sheet: As reported June 30, 2018 ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Cash, cash equivalents, and restricted cash $ 28.7 $ — $ 28.7 Accounts receivable, net 505.6 (0.4 ) 505.2 Inventories 701.1 7.3 708.4 Prepaid expenses and other current assets 48.3 (16.8 ) 31.5 Total current assets 1,283.7 (9.9 ) 1,273.8 Property, plant and equipment, net 441.3 — 441.3 Deferred income taxes 8.4 1.0 9.4 Goodwill 120.3 0.3 120.6 Other noncurrent assets 52.2 — 52.2 Total assets $ 1,905.9 $ (8.6 ) $ 1,897.3 Accounts payable $ 430.1 $ — $ 430.1 Salaries, wages and commissions 48.3 — 48.3 Other accrued liabilities 74.6 (5.5 ) 69.1 Short-term debt 29.9 — 29.9 Current portion of deferred employee benefits 7.7 — 7.7 Total current liabilities 590.6 (5.5 ) 585.1 Long-term debt 1,023.0 — 1,023.0 Deferred employee benefits 221.8 — 221.8 Other noncurrent liabilities 49.3 — 49.3 Total liabilities 1,884.7 (5.5 ) 1,879.2 Accumulated deficit (63.9 ) (3.1 ) (67.0 ) Additional paid-in capital, accumulated other comprehensive loss, and noncontrolling interest 85.1 — 85.1 Total equity (deficit) 21.2 (3.1 ) 18.1 Total liabilities and equity $ 1,905.9 $ (8.6 ) $ 1,897.3

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 13: INCOME TAXES For the three months ended June 30, 2018, the Company recorded income tax expense of . The effective tax rate for the three and six month periods ended June 30, 2018 also reflects the reduced federal corporate income tax rate as a result of the enactment of the U.S. Tax Act in December 2017. We continue to analyze the different aspects of the U.S. Tax Act which could potentially affect the provisional estimates that were recorded at December 31, 2017. In accordance with ASC 740, “ Income Taxes this determination, we analyze, among other things, our recent history of earnings, the nature and timing of reversing book-tax temporary differences, tax planning strategies, and future income. The Company maintains a valuation allowance on certain foreign and U.S. federal and state deferred tax assets until such time as in management’s judgment, considering all available positive and negative evidence, the Company determines that these deferred tax assets are more likely than not realizable. The valuation allowance is reviewed quarterly and will be maintained until sufficient positive evidence exists to support the reversal of some or all of the valuation allowance. The valuation allowance was $24.2 million and $24.4 million at June 30, 2018 and December 31, 2017, respectively. The U.S. Tax Cuts and Jobs Act (the “Act”) subjects a US shareholder to tax on global intangible low-taxed income (“GILTI”) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. Given the complexity of the GILTI provisions, we are still evaluating the effects of these provisions. However, at June 30, 2018, we have estimated the income tax expense associated with the current year to be $0.5 million.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 14: EARNINGS PER SHARE Basic earnings per share attributable to Ryerson Holding’s common stock is determined based on earnings for the period divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share attributable to Ryerson Holding’s common stock considers the effect of potential common shares, unless inclusion of the potential common shares would have an antidilutive effect. The following table sets forth the calculation of basic and diluted earnings per share: Three Months Ended June 30, Six Months Ended June 30, Basic and diluted earnings per share 2018 2017 2018 2017 (In millions, except share and per share data) Numerator: Net income attributable to Ryerson Holding Corporation $ 17.5 $ 0.6 $ 27.9 $ 15.4 Denominator: Weighted average shares outstanding 37,294,982 37,172,472 37,252,020 37,152,655 Dilutive effect of stock-based awards 330,769 120,698 333,151 136,438 Weighted average shares outstanding adjusted for dilutive securities 37,625,751 37,293,170 37,585,171 37,289,093 Earnings per share Basic $ 0.47 $ 0.02 $ 0.75 $ 0.41 Diluted $ 0.46 $ 0.02 $ 0.74 $ 0.41

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	NOTE 15: SUBSEQUENT EVENTS On July 2, 2018, JT Ryerson completed the previously announced acquisition of Central Steel & Wire Company, a Delaware corporation (“ Central Steel & Wire Merger Agreement Merger Sub Merger Central Steel & Wire is a leading metal service center with locations across the central and eastern United States. Central Steel & Wire employs approximately 900 people and operates out of six locations offering custom solutions utilizing value-add processing and a full line of metal products. In connection with the closing of the transaction, shareholders of Central Steel & Wire will receive approximately $150.8 million, or approximately $616.32 per share of Central Steel & Wire common stock outstanding as of the closing. In addition, shareholders of Central Steel & Wire as of the closing of the transaction are eligible to receive up to $7.5 million in the aggregate of additional consideration, which is representative of the amount held back in the transaction to allow for the final determination of Central Steel & Wire’s actual net working capital and net cash (after deducting transaction expenses). Further, if actual net working capital and net cash (after deducting transaction expenses) exceeds the estimated amounts used to calculate the closing payment, shareholders will receive additional consideration for the amount above such estimates. An additional $1 million has been held back to cover the expenses of the shareholders’ representative, the balance of which, to the extent not used, will also be distributed to Central Steel & Wire’s shareholders as of the closing of the transaction on a pro rata basis. Ryerson will also assume approximately $8.9 million in transaction related obligations of Central Steel & Wire as a result of the closing, including certain transaction expenses and retention and change in control payments. The final determination of the purchase price allocation is expected to be completed as soon as practicable after consummation of the acquisition. Due to the limited amount of time between the acquisition date and the date of this filing, it is not practicable for Ryerson to disclose: (i) the allocation of purchase price to assets acquired and liabilities assumed as of the date of close, and (ii) pro forma revenues and earnings of the combined company for the period ended June 30, 2018.

Summary of Accounting and Finan

Summary of Accounting and Financial Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Impact of Recently Issued Accounting Standards—Adopted In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “ Revenue from Contracts with Customers, Revenue from Contracts with Customers Revenue Recognition In January 2016, the FASB issued ASU 2016-01, “ Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities Technical corrections and improvements to Financial Instruments – Overall (Subtopic 825-10) – Recognition and Measurement of Financial Assets and Financial Liabilities . he amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. We adopted this guidance for our fiscal year beginning January 1, 2018. The adoption of this guidance resulted in a reclassification of $1.0 million from accumulated other comprehensive income to retained earnings. In August 2016, the FASB issued ASU 2016-15, “ Statement of Cash Flows – Classification of Certain Cash Receipts and Certain Cash Payments ”. The amendments address the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The update is effective for interim and annual reporting periods beginning after December 15, 2017. In October 2016, the FASB issued ASU 2016-16, “ Income Taxes – Intra-Entity Transfers of Assets Other Than Inventory ” . The adoption of this guidance did not have an impact on our consolidated financial statements. In November 2016, the FASB issued ASU 2016-18 “ Statement of Cash Flows – Restricted Cash using a retrospective transition method to each period presented The adoption of this guidance did not have a material impact on our consolidated financial statements. The previous disclosure for restricted cash within investing activities was removed and the beginning and ending balances of restricted cash are now included in the cash and cash-equivalents balances in our Condensed Consolidated Statements of Cash Flows. There was no impact on the cash flows from operations. See Note 3: Cash, Cash Equivalents, and Restricted Cash for additional required disclosures. In March 2017, the FASB issued ASU 2017-07, “ Compensation – Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post Retirement Benefit Cost . In May 2017, the FASB issued ASU 2017-09, “ Compensation – Stock Compensation: Scope of Modification Accounting Impact of Recently Issued Accounting Standards—Not Yet Adopted In February 2016, the FASB issued ASU 2016-02, “ Leases ” codified in ASC 842, “ Leases ”. The guidance requires lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. The amendment also will require disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative information. The update is effective for interim and annual reporting periods beginning after December 15, 2018. Entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements, and have the option to use certain relief. Early adoption is permitted. The FASB recently proposed an optional transition alternative, currently subject to approval, which would allow for application of the guidance at the beginning of the period in which it is adopted, rather than at the beginning of the earliest comparative period presented. We will adopt this guidance for our fiscal year beginning January 1, 2019. The Company has established a cross-functional project team to implement the updated lease guidance and is in the process of evaluating existing contracts for embedded leases and implementing a lease software to be used for lease tracking and reporting. We are still assessing the impact of adoption on our consolidated financial statements and will assess the method of transition if the optional transition alternative is formally approved. In June 2016, the FASB issued ASU 2016-13, “ Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments ”. The amendment requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected, thus eliminating the probable initial recognition threshold and instead reflecting the current estimate of all expected credit losses. The amendment also requires that credit losses relating to available-for-sale debt securities be recorded through an allowance for credit losses rather than a write-down, thus enabling the ability to record reversals of credit losses in current period net income. The update is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted . In February 2018, the FASB issued ASU 2018-02, “ Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

Cash, Cash Equivalents, and R22

Cash, Cash Equivalents, and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2018
Cash And Cash Equivalents [Abstract]
Reconciliation of Cash, Cash Equivalents, and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the beginning and ending cash balances shown in the Condensed Consolidated Statements of Cash Flows: June 30, December 31, 2018 2017 (In millions) Cash and cash equivalents $ 27.6 $ 77.4 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 28.7 $ 78.5

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2018
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories, at stated LIFO value, were classified at June 30, 2018 and December 31, 2017 as follows: June 30, December 31, 2018 2017 (In millions) In process and finished products $ 701.1 $ 616.5

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt	Long-term debt consisted of the following at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 (In millions) Ryerson Credit Facility $ 384.8 $ 384.2 11.00% Senior Secured Notes due 2022 650.0 650.0 Foreign debt 22.5 21.3 Other debt 8.0 3.9 Unamortized debt issuance costs and discounts (12.4 ) (13.7 ) Total debt 1,052.9 1,045.7 Less: Short-term foreign debt 22.5 21.3 Less: Other short-term debt 7.4 — Total long-term debt $ 1,023.0 $ 1,024.4

Employee Benefits (Tables)

Employee Benefits (Tables)	6 Months Ended
	Jun. 30, 2018
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Benefit (Credit) Cost	The following table summarizes the components of net periodic benefit (credit) cost for the three and six month periods ended June 30, 2018 and 2017 for the Ryerson pension plans and postretirement benefits other than pension: Three Months Ended June 30, Pension Benefits Other Benefits 2018 2017 2018 2017 (In millions) Components of net periodic benefit (credit) cost Service cost $ — $ 1 $ — $ — Interest cost 6 6 — — Expected return on assets (10 ) (11 ) — — Recognized actuarial (gain) loss 4 4 (2 ) (2 ) Net periodic benefit credit $ — $ — $ (2 ) $ (2 ) Six Months Ended June 30, Pension Benefits Other Benefits 2018 2017 2018 2017 (In millions) Components of net periodic benefit (credit) cost Service cost $ — $ 1 $ — $ — Interest cost 12 13 1 1 Expected return on assets (20 ) (21 ) — — Recognized actuarial (gain) loss 8 7 (4 ) (4 ) Amortization of prior service credit — — (1 ) (1 ) Net periodic benefit credit $ — $ — $ (4 ) $ (4 )

Derivatives and Fair Value Me26

Derivatives and Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
Investments All Other Investments [Abstract]
Location and Fair Value Amount of Derivative Instruments	The following table summarizes the location and fair value amount of our derivative instruments reported in our Condensed Consolidated Balance Sheets as of June 30, 2018 and December 31, 2017: Asset Derivatives Liability Derivatives Balance Sheet Location June 30, 2018 December 31, 2017 Balance Sheet Location June 30, 2018 December 31, 2017 (In millions) Derivatives not designated as hedging instruments under ASC 815 Metal commodity contracts Prepaid expenses and other current assets $ 2.6 $ 2.8 Other accrued liabilities $ 2.3 $ 3.9 Foreign exchange contracts Prepaid expenses and other current assets 0.2 0.1 Other accrued liabilities — — Derivatives designated as hedging instruments under ASC 815 Interest rate swaps Deferred charges and other assets 2.2 1.0 Other noncurrent liabilities — — Total derivatives $ 5.0 $ 3.9 $ 2.3 $ 3.9
Location and Amount of Gains and Losses on Derivatives Not Designated as Hedging Instruments Reported in Condensed Consolidated Statements of Comprehensive Income	The following table summarizes the location and amount of gains and losses on derivatives not designated as hedging instruments reported in our Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2018 and 2017: Amount of Gain/(Loss) Recognized in Income on Derivatives Derivatives not designated as hedging instruments Location of Gain/(Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, under ASC 815 on Derivatives 2018 2017 2018 2017 (In millions) Metal commodity contracts Cost of materials sold $ 1.7 $ 0.5 $ 1.3 $ 1.8 Foreign exchange contracts Other income and (expense), net (0.1 ) (0.1 ) 0.1 (0.1 ) Total $ 1.6 $ 0.4 $ 1.4 $ 1.7
Location and Amount of Gains and Losses on Derivatives Designated as Hedging Instruments Reported in Condensed Consolidated Statements of Comprehensive Income	The following table summarizes the location and amount of gains and losses on derivatives designated as hedging instruments reported in our Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2018 and 2017: Amount of Gain/(Loss) Reclassified from Accumulated Other Comprehensive Income into Income Derivatives designated as hedging instruments Location of Gain/(Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, under ASC 815 on Derivatives 2018 2017 2018 2017 (In millions) Interest rate swaps Interest and other expense on debt $ 0.1 $ (0.3 ) $ 0.1 $ (0.4 )
Assets and Liabilities Measured and Recorded at Fair Value	The following table presents assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheet on a recurring basis and their level within the fair value hierarchy as of June 30, 2018: At June 30, 2018 Level 1 Level 2 Level 3 (In millions) Assets Prepaid expenses and other current assets: Equity securities $ 0.1 $ — $ — Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.6 $ — Foreign exchange contracts — 0.2 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 2.2 — Total derivatives $ — $ 5.0 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.3 $ — The following table presents assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheet on a recurring basis and their level within the fair value hierarchy as of December 31, 2017: At December 31, 2017 Level 1 Level 2 Level 3 (In millions) Assets Prepaid expenses and other current assets: Equity securities $ 0.1 $ — $ — Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.8 $ — Foreign exchange contracts — 0.1 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 1.0 — Total derivatives $ — $ 3.9 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 3.9 $ —
Carrying and Estimated Fair Values of Financial Instruments	The carrying and estimated fair values of our financial instruments at June 30, 2018 and December 31, 2017 were as follows: At June 30, 2018 At December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 27.6 $ 27.6 $ 77.4 $ 77.4 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provision for allowances, claims, and doubtful accounts 505.6 505.6 376.3 376.3 Accounts payable 430.1 430.1 275.0 275.0 Long-term debt, including current portion 1,052.9 1,122.1 1,045.7 1,125.9

Stockholders' Equity (Deficit27

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Change in Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	The following table details changes in these accounts: Ryerson Holding Corporation Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Accumulated Deficit Foreign Currency Translation Benefit Plan Liabilities Unrealized Gain (Loss) on Equity Securities Cash Flow Hedge- Interest Rate Swap Non-controlling Interest Total Equity Shares Dollars Shares Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars (In millions, except shares in thousands) Balance at January 1, 2018 37,421 $ 0.4 213 $ (6.6 ) $ 377.6 $ (95.1 ) $ (41.6 ) $ (246.3 ) $ 1.0 $ 0.6 $ 2.6 $ (7.4 ) Net income — — — — — 27.9 — — — — 0.1 28.0 Foreign currency translation — — — — — — (3.8 ) — — — 0.1 (3.7 ) Foreign currency loss on intra-entity transactions — — — — — — (2.3 ) — — — — (2.3 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.7 — — — — — — — 1.9 — — — 1.9 Adoption of accounting principal ASU 2016-01 — — — — — 1.0 — — (1.0 ) — — — Adoption of accounting principal ASC 606, net of tax of $0.7 — — — — — 2.3 — — — — — 2.3 Stock-based compensation expense 87 — — — 1.7 — — — — — — 1.7 Purchase of subsidiary shares from noncontrolling interest — — — — 0.1 — — — — — (0.3 ) (0.2 ) Cash flow hedge - interest rate swap, net of tax of $0.3 — — — — — — — — — 0.9 — 0.9 Balance at June 30, 2018 37,508 $ 0.4 213 $ (6.6 ) $ 379.4 $ (63.9 ) $ (47.7 ) $ (244.4 ) $ — $ 1.5 $ 2.5 $ 21.2
Changes in Accumulated Other Comprehensive Income/(Loss) Net of Tax by Component	The following table details changes in accumulated other comprehensive income (loss), net of tax, for the six months ended June 30, 2018: Changes in Accumulated Other Comprehensive Income (Loss) by Component, net of tax Foreign Currency Translation Benefit Plan Liabilities Cash Flow Hedge - Interest Rate Swap (In millions) Balance at January 1, 2018 $ (41.6 ) $ (246.3 ) $ 0.6 Other comprehensive income (loss) before reclassifications (6.1 ) — 1.0 Amounts reclassified from accumulated other comprehensive income into net income — 1.9 (0.1 ) Net current-period other comprehensive income (loss) (6.1 ) 1.9 0.9 Balance at June 30, 2018 $ (47.7 ) $ (244.4 ) $ 1.5
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2018: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Six Months Ended Affected line item in the Condensed Details about Accumulated Other June 30, 2018 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Cash flow hedge - interest rate swap Realized swap interest income $ (0.1 ) $ (0.1 ) Interest and other expense on debt Tax provision — — Net of tax $ (0.1 ) $ (0.1 ) Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial loss $ 2.1 $ 4.1 Warehousing, delivery, selling, general, and administrative Prior service credits (0.8 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax 1.3 2.6 Tax benefit (0.4 ) (0.7 ) Net of tax $ 0.9 $ 1.9 The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2017: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Six Months Ended Affected line item in the Condensed Details about Accumulated Other June 30, 2017 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Other-than-temporary impairment Other-than-temporary impairment charge $ 0.2 $ 0.2 Other income and (expense), net Tax benefit (0.1 ) (0.1 ) Net of tax $ 0.1 $ 0.1 Cash flow hedge - interest rate swap Realized swap interest loss $ 0.3 $ 0.4 Interest and other expense on debt Tax benefit (0.1 ) (0.1 ) Net of tax $ 0.2 $ 0.3 Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial gain $ (3.7 ) $ (2.1 ) Warehousing, delivery, selling, general, and administrative Prior service credits (0.7 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax (4.4 ) (3.6 ) Tax provision 1.7 1.4 Net of tax $ (2.7 ) $ (2.2 )

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue Recognition [Abstract]
Percentage of Sales by Major Product Lines	The Company derives substantially all of its sales from the distribution of metals. The following table shows the Company’s percentage of sales by major product line: Three Months Ended Six Months Ended June 30, June 30, Product Line 2018 2017 2018 2017 Carbon Steel Flat 28 % 28 % 27 % 28 % Carbon Steel Plate 11 10 11 10 Carbon Steel Long 12 12 12 12 Stainless Steel Flat 17 18 17 18 Stainless Steel Plate 4 4 4 4 Stainless Steel Long 4 4 4 4 Aluminum Flat 16 15 16 15 Aluminum Plate 3 3 3 3 Aluminum Long 4 4 4 4 Other 1 2 2 2 Total 100 % 100 % 100 % 100 %
Summary of Consolidated Financial Information of our Operations by Geographic Location	The following table summarizes consolidated financial information of our operations by geographic location based on where sales originated: Three Months Ended June 30, Six Months Ended June 30, Net Sales 2018 2017 2018 2017 (In millions) United States $ 938.7 $ 773.6 $ 1,774.0 $ 1,491.6 Foreign countries 118.4 101.8 224.4 198.3 Total $ 1,057.1 $ 875.4 $ 1,998.4 $ 1,689.9
Summary of Revenues by Type of Item Sold	The following table summarizes revenues by the type of item sold: Timing of Revenue Recognition Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Revenue on products with an alternative use 88 % 89 % Revenue on products with no alternative use 12 11 Total 100 % 100 %
Summary of Significant Changes in Contract Assets and Contract Liabilities Balances	Significant changes in the contract assets and the contract liabilities balances during the period are as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Contract Assets Contract Liabilities Contract Assets Contract Liabilities (In millions) (In millions) Beginning Balance $ 14.6 $ 4.3 $ 14.2 $ 3.9 Transferred to receivables from contract assets recognized at January 1, 2018 (1.7 ) — (11.8 ) — Satisfied contract liability from beginning of the period — (0.1 ) — (0.3 ) Net contract assets and liabilities added for products with no alternative during the period 0.5 0.2 9.0 0.2 Contract assets and liabilities acquired 0.3 — 0.3 — Changes to reserves 3.1 (0.3 ) 3.3 (1.5 ) Reclass from contract liability to contract asset — — 1.8 1.8 Ending Balance $ 16.8 $ 4.1 $ 16.8 $ 4.1
Summary of Impacts of Adopting ASC 606 on Financial Statements	The following table summarizes the impacts of adopting ASC Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported ASC 606 Adjustments Balances without adoption of ASC 606 As Reported ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Net sales $ 1,057.1 $ 1.1 $ 1,058.2 $ 1,998.4 $ 2.7 $ 2,001.1 Cost of materials sold 871.8 1.9 873.7 1,648.2 3.7 1,651.9 Gross profit 185.3 (0.8 ) 184.5 350.2 (1.0 ) 349.2 Warehousing, delivery, selling, general, and administrative 138.9 (0.1 ) 138.8 269.4 0.1 269.5 Operating profit 46.4 (0.7 ) 45.7 80.8 (1.1 ) 79.7 Other income and (expense), net 1.1 — 1.1 4.7 — 4.7 Interest and other expense on debt (23.9 ) — (23.9 ) (47.2 ) — (47.2 ) Income before income taxes 23.6 (0.7 ) 22.9 38.3 (1.1 ) 37.2 Provision for income taxes 6.2 (0.2 ) 6.0 10.3 (0.3 ) 10.0 Net income 17.4 (0.5 ) 16.9 28.0 (0.8 ) 27.2 Less: Net income attributable to noncontrolling interest (0.1 ) — (0.1 ) 0.1 — 0.1 Net income attributable to Ryerson Holding Corporation $ 17.5 $ (0.5 ) $ 17.0 $ 27.9 $ (0.8 ) $ 27.1 Basic earnings per share $ 0.47 $ (0.02 ) $ 0.45 $ 0.75 $ (0.02 ) $ 0.73 Diluted earnings per share $ 0.46 $ (0.01 ) $ 0.45 $ 0.74 $ (0.02 ) $ 0.72 The following table summarizes the impacts of adopting ASC As reported June 30, 2018 ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Operating activities: Net income $ 28.0 $ (0.8 ) $ 27.2 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Deferred income taxes $ 8.2 $ (0.3 ) 7.9 Other non cash adjustments 24.7 — 24.7 Change in operating assets and liabilities: Receivables (127.0 ) — (127.0 ) Inventories (94.3 ) 3.7 (90.6 ) Other assets (0.9 ) (2.7 ) (3.6 ) Accounts payable 145.5 — 145.5 Accrued liabilities 13.6 0.1 13.7 Accrued taxes payable/receivable 2.6 — 2.6 Deferred employee benefit costs (18.3 ) — (18.3 ) Net adjustments (45.9 ) 0.8 (45.1 ) Net cash used in operating activities (17.9 ) — (17.9 ) As reported June 30, 2018 ASC 606 Adjustments Balances without adoption of ASC 606 (In millions) Cash, cash equivalents, and restricted cash $ 28.7 $ — $ 28.7 Accounts receivable, net 505.6 (0.4 ) 505.2 Inventories 701.1 7.3 708.4 Prepaid expenses and other current assets 48.3 (16.8 ) 31.5 Total current assets 1,283.7 (9.9 ) 1,273.8 Property, plant and equipment, net 441.3 — 441.3 Deferred income taxes 8.4 1.0 9.4 Goodwill 120.3 0.3 120.6 Other noncurrent assets 52.2 — 52.2 Total assets $ 1,905.9 $ (8.6 ) $ 1,897.3 Accounts payable $ 430.1 $ — $ 430.1 Salaries, wages and commissions 48.3 — 48.3 Other accrued liabilities 74.6 (5.5 ) 69.1 Short-term debt 29.9 — 29.9 Current portion of deferred employee benefits 7.7 — 7.7 Total current liabilities 590.6 (5.5 ) 585.1 Long-term debt 1,023.0 — 1,023.0 Deferred employee benefits 221.8 — 221.8 Other noncurrent liabilities 49.3 — 49.3 Total liabilities 1,884.7 (5.5 ) 1,879.2 Accumulated deficit (63.9 ) (3.1 ) (67.0 ) Additional paid-in capital, accumulated other comprehensive loss, and noncontrolling interest 85.1 — 85.1 Total equity (deficit) 21.2 (3.1 ) 18.1 Total liabilities and equity $ 1,905.9 $ (8.6 ) $ 1,897.3

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings Per Share	The following table sets forth the calculation of basic and diluted earnings per share: Three Months Ended June 30, Six Months Ended June 30, Basic and diluted earnings per share 2018 2017 2018 2017 (In millions, except share and per share data) Numerator: Net income attributable to Ryerson Holding Corporation $ 17.5 $ 0.6 $ 27.9 $ 15.4 Denominator: Weighted average shares outstanding 37,294,982 37,172,472 37,252,020 37,152,655 Dilutive effect of stock-based awards 330,769 120,698 333,151 136,438 Weighted average shares outstanding adjusted for dilutive securities 37,625,751 37,293,170 37,585,171 37,289,093 Earnings per share Basic $ 0.47 $ 0.02 $ 0.75 $ 0.41 Diluted $ 0.46 $ 0.02 $ 0.74 $ 0.41

Financial Statements - Addition

Financial Statements - Additional Information (Detail)	Jun. 30, 2018shares
Accounting Policies [Abstract]
Parent company shares owned by affiliates	21,037,500
Parent company percentage owned by affiliates	56.00%

Recent Accounting Pronounceme31

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
ASU 2016-01 [Member]
Recent Accounting Pronouncements [Line Items]
Reclassification of accumulated other comprehensive income to retained earnings			$ 1	$ 1
ASU 2017-07 [Member]
Recent Accounting Pronouncements [Line Items]
Effect of adoption of guidance	$ 1.9	$ 4

Cash, Cash Equivalents, and R32

Cash, Cash Equivalents, and Restricted Cash- Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 27.6	$ 77.4
Restricted cash	1.1	1.1
Total cash, cash equivalents, and restricted cash	$ 28.7	$ 78.5	$ 78.2	$ 81.7

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
In process and finished products	$ 701.1	$ 616.5

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Amount by which current cost used to value inventories is lower than LIFO valued inventories	$ 15	$ 71
Inventories accounted under the LIFO method	89.00%	89.00%
Consignment inventory	$ 8.2	$ 8.9

Goodwill and Other Intangible35

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 120,300,000		$ 115,300,000
Impairment charge	0
Goodwill recognized from business acquisitions	5,000,000	$ 12,100,000
Intangibles assets recognized from business acquisitions	$ 2,100,000	$ 12,200,000

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018
Fanello Industries [Member]
Business Acquisition [Line Items]
Effective date of acquisition	Apr. 2, 2018
Description of business acquisition	On April 2, 2018, Ryerson Holding acquired Fanello Industries, LLC (“Fanello”), a privately owned metal service company located in Lavonia, Georgia.
The Laserflex Corporation [Member]
Business Acquisition [Line Items]
Effective date of acquisition	Jan. 19, 2017
Description of business acquisition	On January 19, 2017, Ryerson Holding acquired The Laserflex Corporation (“Laserflex”), a privately-owned metal fabricator specializing in laser fabrication metal processing and welding with locations in Columbus, Ohio and Wellford, South Carolina.
Guy Metals, Inc [Member]
Business Acquisition [Line Items]
Effective date of acquisition	Feb. 15, 2017
Description of business acquisition	On February 15, 2017, Ryerson Holding acquired Guy Metals, Inc. (“Guy Metals”), a privately-owned metal service center company located in Hammond, Wisconsin.

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Foreign debt	$ 22.5	$ 21.3
Other debt	8	3.9
Unamortized debt issuance costs and discounts	(12.4)	(13.7)
Total debt	1,052.9	1,045.7
Less: Other short-term debt	7.4
Total long-term debt	1,023	1,024.4
2022 Notes [Member]
Debt Instrument [Line Items]
11.00% Senior Secured Notes due 2022	650	650
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Ryerson Credit Facility	$ 384.8	$ 384.2

Long-Term Debt - Ryerson Credit

Long-Term Debt - Ryerson Credit Facility - Additional Information (Detail) - USD ($)	Nov. 16, 2016	Jun. 30, 2018	Jun. 28, 2018	Dec. 31, 2017	Mar. 31, 2017
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity			$ 1,000,000,000
Outstanding borrowings		$ 384,800,000		$ 384,200,000
Letters of credit		12,000,000		12,000,000
Available credit facility		$ 363,000,000		$ 264,000,000
Line of credit facility, description of collateral		Total credit availability is limited by the amount of eligible accounts receivable, inventory, and qualified cash pledged as collateral under the agreement insofar as Ryerson is subject to a borrowing base comprised of the aggregate of these three amounts, less applicable reserves. Eligible accounts receivable, at any date of determination, is comprised of the aggregate value of all accounts directly created by a borrower (and in the case of Canadian accounts, the Canadian borrower) in the ordinary course of business arising out of the sale of goods or the rendering of services, each of which has been invoiced, with such receivables adjusted to exclude various ineligible accounts, including, among other things, those to which a borrower (or guarantor, as applicable) does not have sole and absolute title and accounts arising out of a sale to an employee, officer, director, or affiliate of a borrower (or guarantor, as applicable). Eligible inventory, at any date of determination, is comprised of the net orderly liquidation value of all inventory owned by a borrower (and in the case of Canadian accounts, the Canadian borrower). Qualified cash consists of cash in an eligible deposit account that is subject to customary restrictions and liens in favor of the lenders.
Default bear interest rate		2.00%
Commitment fees on amounts not borrowed		0.23%
Ryerson Credit Facility [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest rate swap agreement date		Mar. 31, 2017
Hedged debt amount					$ 150,000,000
Derivative fixed interest rate					1.658%
Derivative maturity period		2020-03
Weighted average interest rate		3.20%		2.80%
Ryerson Credit Facility [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		0.50%
Ryerson Credit Facility [Member] | Prime Rate and One Month LIBOR Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		1.00%
Ryerson Credit Facility [Member] | 30 Day LIBOR Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		1.00%
Ryerson Credit Facility [Member] | One Month Canadian Bankers Acceptance Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		1.00%
Ryerson Credit Facility [Member] | US Subsidiaries [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity		$ 940,000,000
Ryerson Credit Facility [Member] | Canadian Subsidiaries [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity		$ 60,000,000
Ryerson Credit Facility [Member] | Canadian Subsidiaries [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		0.50%
Ryerson Credit Facility [Member] | Minimum [Member] | Base Rate and Canadian Prime Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		0.25%
Ryerson Credit Facility [Member] | Minimum [Member] | LIBOR and Banker's Acceptance Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		1.25%
Ryerson Credit Facility [Member] | Maximum [Member] | Base Rate and Canadian Prime Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		0.50%
Ryerson Credit Facility [Member] | Maximum [Member] | LIBOR and Banker's Acceptance Rate [Member]
Debt Instrument [Line Items]
Percentage of spread over amount available to be borrowed		1.50%
Old Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity	$ 1,000,000,000
Amended Old Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity	$ 750,000,000
Credit facility maturity date		Nov. 16, 2021
Reduction in interest rate on outstanding borrowing	0.25%
Reduction in commitment fees on amounts not borrowed	0.025%

Long-Term Debt - 2022 Notes - A

Long-Term Debt - 2022 Notes - Additional Information (Detail) - 2022 Notes [Member] - USD ($)	6 Months Ended
	Jun. 30, 2018	May 24, 2016
Debt Instrument [Line Items]
Aggregate amount of senior notes issued		$ 650,000,000
Debt Instrument Percentage		11.00%
Joseph T. Ryerson [Member]
Debt Instrument [Line Items]
Maximum percentage of dividend of future net income	50.00%
Redeemable in twelve months beginning May 15, 2019 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	105.50%
Redeemable in twelve months beginning May 15, 2020 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	102.75%
Redeemable in twelve months beginning May 15, 2021 and thereafter [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	100.00%
Redeemable before May 15, 2019 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	100.00%
Optional redemption price as a percentage of principal amount	111.00%
Redeemable before May 15, 2019 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Optional redemption amount prior to redemption date	35.00%

Long-Term Debt - Foreign Debt -

Long-Term Debt - Foreign Debt - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Foreign debt	$ 22.5	$ 21.3
Foreign Debt [Member]
Debt Instrument [Line Items]
Available credit facility	23	25
Letters of credit issued by our foreign subsidiaries	3	3
Foreign Debt [Member] | Owed to Banks [Member] | Ryerson China [Member]
Debt Instrument [Line Items]
Foreign debt	$ 22.5	$ 21.3
Weighted average interest rate	4.10%	3.70%

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Benefit (Credit) Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 1		$ 1
Interest cost	$ 6	6	$ 12	13
Expected return on assets	(10)	(11)	(20)	(21)
Recognized actuarial (gain) loss	4	4	8	7
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost			1	1
Recognized actuarial (gain) loss	(2)	(2)	(4)	(4)
Amortization of prior service credit			(1)	(1)
Net periodic benefit credit	$ (2)	$ (2)	$ (4)	$ (4)

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Compensation And Retirement Disclosure [Abstract]
Contribution to the pension plan fund	$ 12
Anticipated minimum required pension contribution funding for the remainder of fiscal period	$ 15

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Jan. 06, 2017	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Record of decision description		The ROD includes a combination of dredging, capping and enhanced natural recovery that would take approximately thirteen years to construct plus additional time for monitored natural recovery
Estimated present value cost for construction and recovery	$ 1,050

Derivatives and Fair Value Me44

Derivatives and Fair Value Measurements - Additional Information (Detail)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2018USD ($)T	Dec. 31, 2017USD ($)T	Jan. 01, 2018USD ($)	Mar. 31, 2017USD ($)
Derivatives Fair Value [Line Items]
Equity securities	$ 100,000	$ 100,000	$ 100,000
ASU 2016-01 [Member]
Derivatives Fair Value [Line Items]
'Reclassification of accumulated other comprehensive income to retained earnings			1,000,000	$ 1,000,000
Other Income Expense, Net [Member] | ASU 2016-01 [Member]
Derivatives Fair Value [Line Items]
Gains and losses on derivatives designated as hedging instruments	0	$ 0
Minimum [Member]
Derivatives Fair Value [Line Items]
General contract term for exchange contracts		3 months
Maximum [Member]
Derivatives Fair Value [Line Items]
General contract term for exchange contracts		12 months
Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Fair value of interest rate swaps	2,200,000	$ 2,200,000
Derivative gain (loss) to be reclassified into interest expenses during next 12 months	1,100,000	1,100,000
Interest Rate Swap [Member] | Ryerson Credit Facility [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount					$ 150,000,000
Derivative fixed interest rate					1.658%
Foreign Exchange Forward [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount	7,000,000	$ 7,000,000	$ 5,100,000
Nickel Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Commodity notional value | T		371	453
Hot Roll Steel Coil Swap [Member]
Derivatives Fair Value [Line Items]
Commodity notional value | T		11,700	5,252
Aluminum Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Commodity notional value | T		19,598	15,102
Zinc Contracts [Member]
Derivatives Fair Value [Line Items]
Commodity notional value | T		0	3,402
Ryerson Credit Facility Hedged by Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount	$ 150,000,000	$ 150,000,000	$ 150,000,000

Derivatives and Fair Value Me45

Derivatives and Fair Value Measurements - Location and Fair Value Amount of Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 5	$ 3.9
Liability Derivatives, Fair Value	2.3	3.9
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Metal Commodity Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	2.6	2.8
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Metal Commodity Contracts [Member] | Other Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	2.3	3.9
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	0.2	0.1
Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swap [Member] | Deferred charges and other assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 2.2	$ 1

Derivatives and Fair Value Me46

Derivatives and Fair Value Measurements - Location and Amount of Gains and Losses on Derivatives Not Designated as Hedging Instruments Reported in Condensed Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives			$ 1.5	$ (0.5)
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	$ 1.6	$ 0.4	1.4	1.7
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Metal Commodity Contracts [Member] | Cost of Materials Sold [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	1.7	0.5	1.3	1.8
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Other Income and (Expense), Net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	$ (0.1)	$ (0.1)	$ 0.1	$ (0.1)

Derivatives and Fair Value Me47

Derivatives and Fair Value Measurements - Location and Amount of Gains and Losses on Derivatives Designated as Hedging Instruments Reported in Condensed Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swap [Member] | Interest and Other Expense on Debt [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Reclassified from Accumulated Other Comprehensive Income into Income	$ 0.1	$ (0.3)	$ 0.1	$ (0.4)

Derivatives and Fair Value Me48

Derivatives and Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	$ 0.1	$ 0.1
Asset Derivatives, Fair Value	5	3.9
Liability Derivatives, Fair Value	2.3	3.9
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Metal Commodity Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	2.6	2.8
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	0.2	0.1
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Prepaid Expenses and Other Current Assets [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	0.1	0.1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	5
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Metal Commodity Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	2.6	2.8
Liability Derivatives, Fair Value	2.3	3.9
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	0.2	0.1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives designated as hedging instruments under ASC 815 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value		3.9
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	$ 2.2	$ 1

Derivatives and Fair Value Me49

Derivatives and Fair Value Measurements - Carrying and Estimated Fair Values Financial Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Carrying Amount [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	$ 27.6	$ 77.4
Restricted cash	1.1	1.1
Receivables less provision for allowances, claims, and doubtful accounts	505.6	376.3
Accounts payable	430.1	275
Long-term debt, including current portion	1,052.9	1,045.7
Fair Value [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	27.6	77.4
Restricted cash	1.1	1.1
Receivables less provision for allowances, claims, and doubtful accounts	505.6	376.3
Accounts payable	430.1	275
Long-term debt, including current portion	$ 1,122.1	$ 1,125.9

Stockholders' Equity (Deficit50

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018
Beginning Balance			$ (7.4)
Beginning Balance, shares			37,421,081
Net income	$ 17.4	$ 0.8	$ 28	$ 15.8
Foreign currency translation			(3.7)
Foreign currency loss on intra-entity transactions			(2.3)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax			1.9
Stock-based compensation expense			1.7
Purchase of subsidiary shares from noncontrolling interest			(0.2)
Cash flow hedge - interest rate swap, net of tax of $0.3			0.9
Ending Balance	$ 21.2		$ 21.2
Ending Balance, shares	37,508,442		37,508,442
ASU 606 [Member]
Adoption of accounting principal	$ 2.3		$ 2.3
Common Stock [Member]
Beginning Balance			$ 0.4
Beginning Balance, shares			37,421,000
Stock-based compensation expense, shares			87,000
Ending Balance	$ 0.4		$ 0.4
Ending Balance, shares	37,508,000		37,508,000
Treasury Stock [Member]
Beginning Balance			$ (6.6)
Beginning Balance, shares			213,000
Ending Balance	$ (6.6)		$ (6.6)
Ending Balance, shares	213,000		213,000
Capital in Excess of Par Value [Member]
Beginning Balance			$ 377.6
Stock-based compensation expense			1.7
Purchase of subsidiary shares from noncontrolling interest			0.1
Ending Balance	$ 379.4		379.4
Accumulated Deficit [Member]
Beginning Balance			(95.1)
Net income			27.9
Ending Balance	(63.9)		(63.9)
Accumulated Deficit [Member] | ASU 2016-01 [Member]
Adoption of accounting principal	1		1
Accumulated Deficit [Member] | ASU 606 [Member]
Adoption of accounting principal	2.3		2.3		$ 2.3
Foreign Currency Translation [Member]
Beginning Balance			(41.6)
Foreign currency translation			(3.8)
Foreign currency loss on intra-entity transactions			(2.3)
Ending Balance	(47.7)		(47.7)
Benefit Plan Liabilities [Member]
Beginning Balance			(246.3)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax			1.9
Ending Balance	(244.4)		(244.4)
Unrealized Gain (Loss) on Equity Securities [Member]
Beginning Balance			1
Unrealized Gain (Loss) on Equity Securities [Member] | ASU 2016-01 [Member]
Adoption of accounting principal	(1)		(1)
Cash Flow Hedge - Interest Rate Swap [Member]
Beginning Balance			0.6
Cash flow hedge - interest rate swap, net of tax of $0.3			0.9
Ending Balance	1.5		1.5
Non-controlling Interest [Member]
Beginning Balance			2.6
Net income			0.1
Foreign currency translation			0.1
Purchase of subsidiary shares from noncontrolling interest			(0.3)
Ending Balance	$ 2.5		$ 2.5

Stockholders' Equity (Deficit51

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Parenthetical) (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Equity [Abstract]
Changes in defined benefit pension and other post-retirement benefit plans, tax	$ 0.7
Changes due to adoption of ASC 606, tax	0.7
Changes in interest rate swap, tax	$ 0.3

Stockholders' Equity (Deficit52

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Changes in Accumulated Other Comprehensive Income/(Loss) Net of Tax by Component (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (7.4)
Ending Balance	21.2
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(41.6)
Other comprehensive income (loss) before reclassifications	(6.1)
Net current-period other comprehensive income (loss)	(6.1)
Ending Balance	(47.7)
Benefit Plan Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(246.3)
Amounts reclassified from accumulated other comprehensive income into net income	1.9
Net current-period other comprehensive income (loss)	1.9
Ending Balance	(244.4)
Cash Flow Hedge - Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	0.6
Other comprehensive income (loss) before reclassifications	1
Amounts reclassified from accumulated other comprehensive income into net income	(0.1)
Net current-period other comprehensive income (loss)	0.9
Ending Balance	$ 1.5

Stockholders' Equity (Deficit53

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income and (expense), net	$ 1.1	$ 1	$ 4.7	$ 3.4
Tax benefit	(6.2)	0.8	(10.3)	(6)
Net income	17.4	0.8	28	15.8
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items, Actuarial (Gain) Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	2.1	(3.7)	4.1	(2.1)
Other-than-temporary Impairment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income and (expense), net		0.2		0.2
Tax benefit		(0.1)		(0.1)
Net income		0.1		0.1
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items, Prior Service Credits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	(0.8)	(0.7)	(1.5)	(1.5)
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	1.3	(4.4)	2.6	(3.6)
Tax provision (benefit)	(0.4)	1.7	(0.7)	1.4
Net of tax	0.9	(2.7)	1.9	(2.2)
Cash Flow Hedge - Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Realized swap interest income	(0.1)	0.3	(0.1)	0.4
Tax provision (benefit)		(0.1)		(0.1)
Net of tax	$ (0.1)	$ 0.2	(0.1)	$ 0.3
Net of tax			$ (0.1)

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	Jan. 01, 2018	Jun. 30, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net contract liability related to shipping and handling costs		$ 0.1
Payment terms on invoiced amounts		30 days
Accounts receivables from contracts with customers		$ 507.6
Adoption of ASC 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognition under transition method adjustment	$ 12.3
Revenue recognition under transition method adjustment		2.3
Accounts receivables from contracts with customers	381.2
Adoption of ASC 606 [Member] | Accumulated Deficit [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognition under transition method adjustment	$ 2.3	$ 2.3
Minimum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Percentage of revenue from product sales		75.00%
Maximum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations on contracts have expected duration		1 year

Revenue Recognition - Percentag

Revenue Recognition - Percentage of Sales by Major Product Lines (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Product Line
Percentage of sales by major product lines	100.00%	100.00%	100.00%	100.00%
Carbon Steel Flat [Member]
Product Line
Percentage of sales by major product lines	28.00%	28.00%	27.00%	28.00%
Carbon Steel Plate [Member]
Product Line
Percentage of sales by major product lines	11.00%	10.00%	11.00%	10.00%
Carbon Steel Long [Member]
Product Line
Percentage of sales by major product lines	12.00%	12.00%	12.00%	12.00%
Stainless Steel Flat [Member]
Product Line
Percentage of sales by major product lines	17.00%	18.00%	17.00%	18.00%
Stainless Steel Plate [Member]
Product Line
Percentage of sales by major product lines	4.00%	4.00%	4.00%	4.00%
Stainless Steel Long [Member]
Product Line
Percentage of sales by major product lines	4.00%	4.00%	4.00%	4.00%
Aluminum Flat [Member]
Product Line
Percentage of sales by major product lines	16.00%	15.00%	16.00%	15.00%
Aluminum Plate [Member]
Product Line
Percentage of sales by major product lines	3.00%	3.00%	3.00%	3.00%
Aluminum Long [Member]
Product Line
Percentage of sales by major product lines	4.00%	4.00%	4.00%	4.00%
Other [Member]
Product Line
Percentage of sales by major product lines	1.00%	2.00%	2.00%	2.00%

Revenue Recognition - Summary o

Revenue Recognition - Summary of Consolidated Financial Information of our Operations by Geographic Location (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Net sales	$ 1,057.1	$ 875.4	$ 1,998.4	$ 1,689.9
United States [Member]
Disaggregation Of Revenue [Line Items]
Net sales	938.7	773.6	1,774	1,491.6
Foreign Countries [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 118.4	$ 101.8	$ 224.4	$ 198.3

Revenue Recognition - Summary57

Revenue Recognition - Summary of Revenues by Type of Item Sold (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total	100.00%	100.00%
Revenue Recognized Point In Time
Disaggregation Of Revenue [Line Items]
Revenue on products with an alternative use	88.00%	89.00%
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Revenue on products with no alternative use	12.00%	11.00%

Revenue Recognition - Summary58

Revenue Recognition - Summary of Significant Changes in Contract Assets and Contract Liabilities Balances (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Changes in the Contract Assets
Beginning Balance	$ 14.6	$ 14.2
Transferred to receivables from contract assets recognized at January 1, 2018	(1.7)	(11.8)
Net contract assets added for products with no alternative during the period	0.5	9
Contract assets acquired	0.3	0.3
Changes to reserves	3.1	3.3
Reclass from contract liability to contract asset		1.8
Ending Balance	16.8	16.8
Changes in the Contract Liabilities
Beginning Balance	4.3	3.9
Satisfied contract liability from beginning of the period	(0.1)	(0.3)
Net contract liabilities added for products with no alternative during the period	0.2	0.2
Changes to reserves	(0.3)	(1.5)
Reclass from contract liability to contract asset		1.8
Ending Balance	$ 4.1	$ 4.1

Revenue Recognition - Summary59

Revenue Recognition - Summary of Impacts of Adopting ASC 606 Condensed Consolidated Statements of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1,057.1	$ 875.4	$ 1,998.4	$ 1,689.9
Cost of materials sold	871.8	735	1,648.2	1,388.9
Gross profit	185.3	140.4	350.2	301
Warehousing, delivery, selling, general, and administrative	138.9	118.6	269.4	238
Operating profit	46.4	21.8	80.8	63
Other income and (expense), net	1.1	1	4.7	3.4
Interest and other expense on debt	(23.9)	(22.8)	(47.2)	(44.6)
Income before income taxes	23.6		38.3	21.8
Provision for income taxes	6.2	(0.8)	10.3	6
Net income	17.4	0.8	28	15.8
Less: Net income attributable to noncontrolling interest	(0.1)	0.2	0.1	0.4
Net income attributable to Ryerson Holding Corporation	$ 17.5	$ 0.6	$ 27.9	$ 15.4
Basic earnings per share	$ 0.47	$ 0.02	$ 0.75	$ 0.41
Diluted earnings per share	$ 0.46	$ 0.02	$ 0.74	$ 0.41
Adjustments [Member] | ASU 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1.1		$ 2.7
Cost of materials sold	1.9		3.7
Gross profit	(0.8)		(1)
Warehousing, delivery, selling, general, and administrative	(0.1)		0.1
Operating profit	(0.7)		(1.1)
Income before income taxes	(0.7)		(1.1)
Provision for income taxes	(0.2)		(0.3)
Net income	(0.5)		(0.8)
Net income attributable to Ryerson Holding Corporation	$ (0.5)		$ (0.8)
Basic earnings per share	$ (0.02)		$ (0.02)
Diluted earnings per share	$ (0.01)		$ (0.02)
Balance without Adoption of ASC 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1,058.2		$ 2,001.1
Cost of materials sold	873.7		1,651.9
Gross profit	184.5		349.2
Warehousing, delivery, selling, general, and administrative	138.8		269.5
Operating profit	45.7		79.7
Other income and (expense), net	1.1		4.7
Interest and other expense on debt	(23.9)		(47.2)
Income before income taxes	22.9		37.2
Provision for income taxes	6		10
Net income	16.9		27.2
Less: Net income attributable to noncontrolling interest	(0.1)		0.1
Net income attributable to Ryerson Holding Corporation	$ 17		$ 27.1
Basic earnings per share	$ 0.45		$ 0.73
Diluted earnings per share	$ 0.45		$ 0.72

Revenue Recognition - Summary60

Revenue Recognition - Summary of Impacts of Adopting ASC 606 Condensed Consolidated Statements of Cash Flow (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income	$ 17.4	$ 0.8	$ 28	$ 15.8
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income taxes			8.2	6
Other non cash adjustments			24.7
Change in operating assets and liabilities:
Receivables			(127)	(101.4)
Inventories			(94.3)	(75.8)
Other assets			(0.9)	(1.8)
Accounts payable			145.5	68.7
Accrued liabilities			13.6	0.4
Accrued taxes payable/receivable			2.6	(1.1)
Deferred employee benefit costs			(18.3)	(16)
Net adjustments			(45.9)	(97.3)
Net cash used in operating activities			(17.9)	$ (81.5)
Adjustments [Member] | ASU 606 [Member]
Operating activities:
Net income	(0.5)		(0.8)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income taxes			(0.3)
Change in operating assets and liabilities:
Inventories			3.7
Other assets			(2.7)
Accrued liabilities			0.1
Net adjustments			0.8
Balance without Adoption of ASC 606 [Member]
Operating activities:
Net income	$ 16.9		27.2
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income taxes			7.9
Other non cash adjustments			24.7
Change in operating assets and liabilities:
Receivables			(127)
Inventories			(90.6)
Other assets			(3.6)
Accounts payable			145.5
Accrued liabilities			13.7
Accrued taxes payable/receivable			2.6
Deferred employee benefit costs			(18.3)
Net adjustments			(45.1)
Net cash used in operating activities			$ (17.9)

Revenue Recognition - Summary61

Revenue Recognition - Summary of Impacts of Adopting ASC 606 Condensed Consolidated Statements of Balance Sheet (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Cash, cash equivalents, and restricted cash	$ 28.7	$ 78.5	$ 78.2	$ 81.7
Accounts receivable, net	505.6
Inventories	701.1	616.5
Prepaid expenses and other current assets	48.3	32.6
Total current assets	1,283.7	1,103.9
Property, plant and equipment, net	441.3	422.9
Deferred income taxes	8.4	17.9
Goodwill	120.3	115.3
Other noncurrent assets	52.2
Total assets	1,905.9	1,711.9
Accounts payable	430.1	275
Salaries, wages and commissions	48.3	40.3
Other accrued liabilities	74.6	58.4
Short-term debt	29.9	21.3
Current portion of deferred employee benefits	7.7	7.7
Total current liabilities	590.6	402.7
Long-term debt	1,023	1,024.4
Deferred employee benefits	221.8	243.5
Other noncurrent liabilities	49.3	48.7
Total liabilities	1,884.7	1,719.3
Accumulated deficit	(63.9)	(95.1)
Additional paid-in capital, accumulated other comprehensive loss, and noncontrolling interest	85.1
Total equity (deficit)	21.2	(7.4)
Total liabilities and equity	1,905.9	$ 1,711.9
Adjustments [Member] | ASU 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	(0.4)
Inventories	7.3
Prepaid expenses and other current assets	(16.8)
Total current assets	(9.9)
Deferred income taxes	1
Goodwill	0.3
Total assets	(8.6)
Other accrued liabilities	(5.5)
Total current liabilities	(5.5)
Total liabilities	(5.5)
Accumulated deficit	(3.1)
Total equity (deficit)	(3.1)
Total liabilities and equity	(8.6)
Balance without Adoption of ASC 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Cash, cash equivalents, and restricted cash	28.7
Accounts receivable, net	505.2
Inventories	708.4
Prepaid expenses and other current assets	31.5
Total current assets	1,273.8
Property, plant and equipment, net	441.3
Deferred income taxes	9.4
Goodwill	120.6
Other noncurrent assets	52.2
Total assets	1,897.3
Accounts payable	430.1
Salaries, wages and commissions	48.3
Other accrued liabilities	69.1
Short-term debt	29.9
Current portion of deferred employee benefits	7.7
Total current liabilities	585.1
Long-term debt	1,023
Deferred employee benefits	221.8
Other noncurrent liabilities	49.3
Total liabilities	1,879.2
Accumulated deficit	(67)
Additional paid-in capital, accumulated other comprehensive loss, and noncontrolling interest	85.1
Total equity (deficit)	18.1
Total liabilities and equity	$ 1,897.3

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ 6.2	$ (0.8)	$ 10.3	$ 6
Valuation allowance	$ 24.2		24.2		$ 24.4
Estimated income tax expense associated with TCJA Act			$ 0.5

Earnings Per Share - Calculatio

Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income attributable to Ryerson Holding Corporation	$ 17.5	$ 0.6	$ 27.9	$ 15.4
Denominator:
Weighted average shares outstanding	37,294,982	37,172,472	37,252,020	37,152,655
Dilutive effect of stock-based awards	330,769	120,698	333,151	136,438
Weighted average shares outstanding adjusted for dilutive securities	37,625,751	37,293,170	37,585,171	37,289,093
Earnings per share
Basic earnings per share	$ 0.47	$ 0.02	$ 0.75	$ 0.41
Diluted earnings per share	$ 0.46	$ 0.02	$ 0.74	$ 0.41

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Central Steel & Wire [Member] - Subsequent Events [Member]	Jul. 02, 2018USD ($)EmployeeLocation$ / shares
Subsequent Event [Line Items]
Effective date of acquisition	Jul. 2, 2018
Description of business acquisition	On July 2, 2018, JT Ryerson completed the previously announced acquisition of Central Steel & Wire Company, a Delaware corporation (“Central Steel & Wire”), pursuant to the terms of the previously announced Agreement and Plan of Merger (the “Merger Agreement”), dated as of June 4, 2018, by and among JT Ryerson, Hunter MergerCo, Inc., a Delaware corporation and wholly-owned subsidiary of JT Ryerson (“Merger Sub”), Central Steel & Wire, and Fortis Advisors LLC, a Delaware limited liability company, solely in its capacity as the representative of Central Steel & Wire’s stockholders thereunder.
Business combination, provisions held back to cover expenses of shareholders representative	$ 1,000,000
Business combination, assumed transaction related obligations	8,900,000
Maximum [Member]
Subsequent Event [Line Items]
Business combination, provisions held back for determination of net working capital	7,500,000
Common Stock [Member]
Subsequent Event [Line Items]
Business combination, shareholders consideration	$ 150,800,000
Business combination, price per share | $ / shares	$ 616.32
Central And Eastern United States [Member]
Subsequent Event [Line Items]
Number of people employs | Employee	900
Number of locations operates | Location	6