Ryerson Holding (RYI) 10-Q 5 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	RYI
Entity Registrant Name	RYERSON HOLDING CORPORATION
Entity Central Index Key	0001481582
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		37,783,761
Entity Current Reporting Status	Yes
Entity File Number	001-34735
Entity Tax Identification Number	261251524
Entity Address, Address Line One	227 W. Monroe St.
Entity Address, Address Line Two	27th Floor
Entity Address, City or Town	Chicago
Entity Address, State or Province	Illinois
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	292-5000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net sales	$ 1,204.9	$ 1,057.1	$ 2,435.7	$ 1,998.4
Cost of materials sold	993.1	871.8	1,992.6	1,648.2
Gross profit	211.8	185.3	443.1	350.2
Warehousing, delivery, selling, general, and administrative	164.6	138.9	328.3	269.4
Restructuring and other charges	1.1		1.4
Operating profit	46.1	46.4	113.4	80.8
Other income and (expense), net	(0.2)	1.1	(1)	4.7
Interest and other expense on debt	(23.9)	(23.9)	(47.8)	(47.2)
Income before income taxes	22	23.6	64.6	38.3
Provision for income taxes	5.5	6.2	18.5	10.3
Net income	16.5	17.4	46.1	28
Less: Net income (loss) attributable to noncontrolling interest	0.1	(0.1)	0.2	0.1
Net income attributable to Ryerson Holding Corporation	16.4	17.5	45.9	27.9
Comprehensive income	17.5	15.2	50.6	24.8
Less: Comprehensive income attributable to noncontrolling interest	0.1		0.3	0.2
Comprehensive income attributable to Ryerson Holding Corporation	$ 17.4	$ 15.2	$ 50.3	$ 24.6
Basic earnings per share	$ 0.43	$ 0.47	$ 1.22	$ 0.75
Diluted earnings per share	$ 0.43	$ 0.46	$ 1.21	$ 0.74

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net income	$ 46.1	$ 28
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	28.7	23.1
Stock-based compensation	1.6	1.7
Deferred income taxes	17	8.2
Provision for allowances, claims, and doubtful accounts	1.6	1.4
Restructuring and other charges	1.4
Loss on retirement of debt	0.2
Non-cash (gain) loss from derivatives	5.7	(1.5)
Other items	0.4
Change in operating assets and liabilities:
Receivables	(31.8)	(127)
Inventories	(15.2)	(94.3)
Other assets	1.1	(0.9)
Accounts payable	30.8	145.5
Accrued liabilities	(24.7)	13.6
Accrued taxes payable/receivable	(1.6)	2.6
Deferred employee benefit costs	(13.3)	(18.3)
Net adjustments	1.9	(45.9)
Net cash provided by (used in) operating activities	48	(17.9)
Investing activities:
Acquisitions, net of cash acquired		(16.2)
Capital expenditures	(23.4)	(21.4)
Proceeds from sale of property, plant, and equipment	8.6	0.4
Net cash used in investing activities	(14.8)	(37.2)
Financing activities:
Repayment of debt	(12)	(0.1)
Net proceeds (repayments) of short-term borrowings	(29.8)	1.7
Purchase of subsidiary shares from noncontrolling interest		(0.2)
Credit facility amendment costs		(0.5)
Net increase in book overdrafts	7.1	8
Principal payments on finance lease obligations	(6.3)	(5.9)
Contingent payment related to acquisition	(0.9)
Proceeds from sale-leaseback transactions	8.3	4.5
Net cash provided by (used in) financing activities	(33.6)	7.5
Net decrease in cash, cash equivalents, and restricted cash	(0.4)	(47.6)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		(2.2)
Net change in cash, cash equivalents, and restricted cash	(0.4)	(49.8)
Cash, cash equivalents, and restricted cash—beginning of period	24.3	78.5
Cash, cash equivalents, and restricted cash—end of period	23.9	28.7
Cash paid during the period for:
Interest paid to third parties, net	46.4	43.9
Income taxes, net	4.2	0.9
Noncash investing activities:
Asset additions under adoption of accounting principal ASC 842	82.3
Asset additions under operating leases	10.8
Asset additions under finance leases and sale-leasebacks	0.6	9.4
Asset additions under financing arrangements	2.2	$ 4.2
Noncash financing activities:
Short term debt converted to finance lease	$ 7.6

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 22.8	$ 23.2
Restricted cash	1.1	1.1
Receivables less provisions	552.5	521
Inventories	823.6	806.3
Prepaid expenses and other current assets	49.8	61.5
Total current assets	1,449.8	1,413.1
Property, plant, and equipment, at cost	853.2	838.4
Less: Accumulated depreciation	369.9	349.4
Property, plant, and equipment, net	483.3	489
Operating lease assets	83.4
Other intangible assets	54.4	58.1
Goodwill	120.3	120.3
Deferred charges and other assets	4.4	5.8
Total assets	2,195.6	2,086.3
Current liabilities:
Accounts payable	427.9	390.2
Salaries, wages, and commissions	39.9	66.6
Other accrued liabilities	80.8	77
Short-term debt	15.4	27.3
Current portion of operating lease liabilities	17.8
Current portion of deferred employee benefits	7.9	7.9
Total current liabilities	589.7	569
Long-term debt	1,100.3	1,126
Deferred employee benefits	243.5	258.4
Noncurrent operating lease liabilities	71.2
Other noncurrent liabilities	59.8	57
Total liabilities	2,064.5	2,010.4
Commitments and contingencies
Ryerson Holding Corporation stockholders’ equity:
Preferred stock, value
Common stock, value	0.4	0.4
Capital in excess of par value	379.7	381
Retained earnings	63.1	14.2
Treasury stock at cost - Common stock, value	(6.6)	(6.6)
Accumulated other comprehensive loss	(311.4)	(315.8)
Total Ryerson Holding Corporation stockholders’ equity	125.2	73.2
Noncontrolling interest	5.9	2.7
Total equity	131.1	75.9
Total liabilities and equity	$ 2,195.6	$ 2,086.3

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Receivables, provisions	$ 3.4	$ 2.5
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	37,996,261	37,656,505
Treasury stock at cost - Common stock, shares	212,500	212,500

Financial Statements

Financial Statements	6 Months Ended
	Jun. 30, 2019
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, 2019 and for the three-month and six-month periods ended June 30, 2019 and 2018 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, 2018.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	NO TE 2: RECENT ACCOUNTING PRONOUNCEMENTS Impact of Recently Issued Accounting Standards—Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “ Leases ” codified in Accounting Standards Codification (“ASC”) 842, “ Leases ” (“ASC 842”). The guidance in ASU 2016- We adopted the standard effective January 1, 2019 using the alternative modified retrospective transition method, which allows 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. Adoption of the new standard resulted in the recording of operating lease assets and liabilities of $ 82.3 In February 2018, the FASB issued ASU 2018-02, “ Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. Impact of Recently Issued Accounting Standards—Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, “ Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. ” The standard and subsequently issued amendments require 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 August 2018, the FASB issued ASU 2018-13, “ Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. Measurement. The update is effective for interim and annual reporting periods beginning after December 15, 2019. The guidance allows for early adoption to remove or modify disclosures upon issuance of this amendment, and for delayed adoption of the additional disclosures until their effective date. We are still assessing the impact of adoption on our current fair value measurement disclosures. In August 2018, the FASB issued ASU 2018-14, “ Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans. In August 2018, the FASB issued ASU 2018-15, “ Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.

Cash, Cash Equivalents, and Res

Cash, Cash Equivalents, and Restricted Cash	6 Months Ended
	Jun. 30, 2019
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, 2019 2018 (In millions) Cash and cash equivalents $ 22.8 $ 23.2 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 23.9 $ 24.3 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, 2019
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, 2019 and December 31, 2018 as follows: June 30, December 31, 2019 2018 (In millions) In process and finished products $ 823.6 $ 806.3 If current cost had been used to value inventories, such inventories would have been $15 million lower The Company has consignment inventory at certain customer locations, which totaled $8.5 million and $9.3 million at June 30, 2019 and December 31, 2018, respectively.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	NOTE 5: LEASES The Company leases various assets including real estate, trucks, trailers, mobile equipment, processing equipment, and IT equipment. The Company has noncancelable operating leases expiring at various times through 2029, and finance leases expiring at various times through 2025. Policy Elections & Practical Expedients The Company has made an accounting policy election not to record leases with an initial term of 12 months or less (“short term leases”) on the balance sheet as allowed within ASC 842. Short term lease expense is recognized on a straight-line basis over the lease term. The Company has elected to apply the practical expedient that allows for the combination of lease and non-lease components for all asset classes. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification for leases that existed at the transition date. Significant Judgments Many of our real estate leases include one or more options to renew, with renewal terms that can extend the lease term from one to 5 years or more. To determine the expected lease term, we include any noncancelable periods within the lease agreement as well as any periods covered by an option to extend the lease if we are reasonably certain to exercise the option. The equipment leases do not typically include options for renewal but do include options for purchase at the end of the lease. We determine the likelihood of exercising the option for purchase by assessing the option price versus the estimated fair value at the end of the lease term to determine if the option price is low enough that we are reasonably certain to exercise it. The depreciable life of finance lease assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Lease payments include fixed payments, the exercise price of a purchase option that is reasonably certain of exercise, variable payments based on a known index, and the amount probable that the Company will owe under a residual value guarantee. Variable lease payments that are not based on a known index are not included in lease payments and rather are expensed as incurred. For discount rates that are used to determine the amount of right of use assets, lease liabilities, and lease classification, the Company uses the interest rate implicit in the lease when known. If the rate implicit in the lease is not known, the Company will use its incremental borrowing rate defined as the interest rate swap rate that approximates the lease term plus the long-term expected spread on the $1.0 billion revolving credit facility amended as of June 28, 2018 (the “Ryerson Credit Facility”). We sublease certain real estate to third parties for facilities that we have closed. The following table summarizes the location and amount of lease assets and lease liabilities reported in our Condensed Consolidated Balance Sheet as of June 30, 2019: June 30, Leases Balance Sheet Location 2019 (In millions) Assets Operating lease assets Operating lease assets $ 83.4 Finance lease assets Property, plant, and equipment, net (a) 56.1 Total lease assets $ 139.5 Liabilities Current Operating Current portion of operating lease liabilities $ 17.8 Finance Other accrued liabilities 13.5 Noncurrent Operating Noncurrent operating lease liabilities 71.2 Finance Other noncurrent liabilities 23.3 Total lease liabilities $ 125.8 (a) Finance lease assets are recorded net of accumulated amortization of $18.0 million as of June 30, 2019. The following table summarizes the location and amount of lease expense reported in our Condensed Consolidated Statement of Comprehensive Income for the three and six month periods ended June 30, 2019: Three Months Ended June 30, Six Months Ended June 30, Lease Expense Location of Lease Expense Recognized in Income 2019 2019 (In millions) Operating lease expense Warehousing, delivery, selling, general, and administrative $ 5.5 $ 11.1 Finance lease expense Amortization of lease assets Warehousing, delivery, selling, general, and administrative 1.8 3.4 Interest on lease liabilities Interest and other expense on debt 0.5 0.9 Variable lease expense Warehousing, delivery, selling, general, and administrative 0.7 1.4 Short-term lease expense Warehousing, delivery, selling, general, and administrative 0.6 1.1 Total lease expense $ 9.1 $ 17.9 The following table presents maturity analysis of lease liabilities at June 30, 2019 : Maturity of Lease Liabilities Operating Leases (a) Finance Leases (In millions) 2019 $ 10.7 $ 8.1 2020 20.3 13.5 2021 18.1 8.4 2022 14.4 4.8 2023 11.2 2.8 After 2023 24.6 2.3 Total lease payments 99.3 39.9 Less: Interest (b) (10.3 ) (3.1 ) Present value of lease liabilities (c) $ 89.0 $ 36.8 (a) There were no operating leases with options to extend lease terms that are reasonably certain of being exercised and the operating lease payments exclude $0.3 million of legally binding minimum lease payments for leases signed but not yet commenced. (b) Calculated using the discount rate for each lease. (c) Includes the current portion of $17.8 million for operating leases and $13.5 million for finance leases. The following table shows the weighted-average remaining lease term and discount rate for operating and finance leases, respectively, at June 30, 2019: June 30, Lease Term and Discount Rate 2019 Weighted-average remaining lease term (years) Operating leases 5.7 Finance leases 2.9 Weighted-average discount rate Operating leases 3.8 % Finance leases 4.9 % Other information reported in our Condensed Consolidated Statement of Cash Flows for the six months ended June 30, 2019 is summarized below: Six Months Ended June 30, Other Information 2019 (In millions) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 10.1 Operating cash flows from finance leases 0.9 Financing cash flows from finance leases 6.3 Assets obtained in exchange for lease obligations: Adoption of accounting principal ASC 842 82.3 Operating leases 10.8 Finance leases 0.6

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 6: 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 Intangibles – Goodwill and Other, October 1, 2018 Other intangible assets with finite useful lives continue to be amortized over their useful lives. 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, 2019
Business Combinations [Abstract]
Acquisitions	NOTE 7: On July 2, 2018 (“the acquisition date”) JT Ryerson purchased Central Steel & Wire Company (“CS&W”). CS&W is a leading metal service center with The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date. At July 2, 2018 (In millions) Cash and cash equivalents $ 10.0 Receivables, less provisions 80.0 Inventories 179.8 Prepaid expenses and other current assets 1.7 Property, plant, and equipment 66.5 Other intangible assets 16.1 Total identifiable assets acquired 354.1 Accounts payable (49.7 ) Salaries, wages, and commissions (4.9 ) Other accrued liabilities (6.5 ) Deferred income taxes (27.7 ) Deferred employee benefits (31.8 ) Total liabilities assumed (120.6 ) Net identifiable assets acquired 233.5 Bargain purchase gain (70.0 ) Total purchase price $ 163.5 The Company used third-party valuation firms to estimate the fair values of property, plant, and equipment and intangible assets as well as to remeasure the deferred employee benefits liabilities. Inventory was valued by the Company using acquisition date fair values of the metals. The fair value of accounts receivables acquired was $80.0 million, with a gross amount of $81.8 million. The Company expects $1.8 million to be uncollectible. The $16.1 million of acquired intangible assets is related to a trademark acquired with a useful life of 10 years. The transaction resulted in a bargain purchase gain primarily due to higher inventory and property, plant, and equipment fair values compared to book values. The Company believes that the bargain purchase gain was primarily the result of the decision by majority stockholders of CS&W to sell their interests as CS&W had been experiencing increasing net losses. The agreed upon purchase price reflected the fact the seller would have needed to incur significant costs on future integration initiatives and to upgrade their infrastructure and computer systems in order to restore CS&W to a profitable basis. With our existing nationwide service center operations, we believe that our infrastructure will allow the necessary operational improvements to be implemented more efficiently than the seller. The gain of $70.0 million was included in Other income and (expense), net in the Condensed Consolidated Statements of Comprehensive Income in the second half of 2018. The Company recognized $1.6 million in acquisition-related fees, which was included in Warehousing, delivery, selling, general, and administrative expense in the Condensed Consolidated Statements of Comprehensive Income in the second half of 2018. Included in the three-month and six-month periods ended June 30, 2019 financial results is revenue of $154.3 million and $326.5 million, and a net loss of $1.4 million and net income of $2.2 million, respectively, The following unaudited pro forma information presents consolidated results of operations for the three-month and six-month periods ended June 30, 2019 and 2018 as if the acquisition of CS&W on July 2, 2018 had occurred on January 1, 2018: Pro Forma Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In millions) Net sales $ 1,204.9 $ 1,245.3 $ 2,435.7 $ 2,357.7 Net income attributable to Ryerson Holding Corporation 16.4 2.7 45.9 9.4 On April 2, 2018, Ryerson Holding acquired Fanello Industries, LLC (“Fanello”), a privately owned metal service company located in Lavonia, Georgia. Pro forma information related to the acquisition of Fanello is not provided above as the impact on the Condensed Consolidated Statements of Comprehensive Income is not material.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 8: LONG-TERM DEBT Long-term debt consisted of the following at June 30, 2019 and December 31, 2018: June 30, December 31, 2019 2018 (In millions) Ryerson Credit Facility $ 511.9 $ 535.9 11.00% Senior Secured Notes due 2022 587.9 599.5 Foreign debt 13.7 19.5 Other debt 10.3 8.3 Unamortized debt issuance costs and discounts (8.1 ) (9.9 ) Total debt 1,115.7 1,153.3 Less: Short-term foreign debt 13.7 19.5 Less: Other short-term debt 1.7 7.8 Total long-term debt $ 1,100.3 $ 1,126.0 Ryerson Credit Facility O n November 16, 2016, Ryerson entered into an amendment with respect to its $1.0 billion revolving credit facility (as amended, the “Old Credit Facility”), to reduce the total facility size from $1.0 billion to $750 million, 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. The Old Credit Facility was amended a second time on June 28, 2018, to increase the facility size from $750 million to $1.0 billion. At June 30, 2019 , Ryerson had $511.9 million of outstanding borrowings, $12 million of letters of credit issued, and $395 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. In June 2019, we entered into a second interest rate swap to fix interest on $60 million of our floating rate debt under the Ryerson Credit Facility at a rate of 1.729% through June 2022. Both of 3.5 Borrowings under the Ryerson The Ryerson Ryerson Ryerson The Ryerson Credit Facility contains events of default with respect to, among other things, default in the payment of principal when due or the payment of interest, fees, and other amounts due thereunder after a specified grace period, material misrepresentations, failure to perform certain specified covenants, certain bankruptcy events, the invalidity of certain security agreements or guarantees, material judgments, and the occurrence of a change of control of Ryerson. If such an event of default occurs, the lenders under the Ryerson Credit Facility will be entitled to various remedies, including acceleration of amounts outstanding under the Ryerson Credit Facility and all other actions permitted to be taken by secured creditors. 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. During 2018, a principal amount of $50.5 million of the 2022 Notes were repurchased for $52.2 million and retired. During the first six months of 2019, a principal amount of $11.6 million of the 2022 Notes were repurchased for $11.8 million and retired, resulting in the recognition of a $0.2 million loss within other income and (expense), net on the Condensed Consolidated Statement of Comprehensive Income. 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 are redeemable at the following redemption prices: if redeemed during the twelve months beginning (i) May 15, 2019 at 105.50%, (ii) May 15, 2020 at 102.75%, and (iii) May 15, 2021 and thereafter at 100.00%. 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 cumulative net income since the issuance of the 2022 Notes, once prior losses are offset. Foreign Debt At June 30, 2019, Ryerson China’s foreign borrowings were $13.7 million, which were owed to banks in Asia at a weighted average interest rate of 4.3% per annum and secured by inventory and property, plant, and equipment. At December 31, 2018, Ryerson China’s foreign borrowings were $19.5 million rate of 4.3% Availability under the foreign credit lines was $32 million and $26 million at June 30, 2019 and December 31, 2018. Letters of credit issued by our foreign subsidiaries were $3 million at June 30, 2019 and December 31, 2018.

Employee Benefits

Employee Benefits	6 Months Ended
	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Employee Benefits	NOTE 9: EMPLOYEE BENEFITS The following table summarizes the components of net periodic benefit cost (credit) for the three and six month periods ended June 30, 2019 and 2018 for the Ryerson pension plans and postretirement benefits other than pension: Three Months Ended June 30, Pension Benefits Other Benefits 2019 2018 2019 2018 (In millions) Components of net periodic benefit cost (credit) Service cost $ 1 $ — $ — $ — Interest cost 7 6 — — Expected return on assets (9 ) (10 ) — — Recognized actuarial (gain) loss 3 4 (2 ) (2 ) Net periodic benefit cost (credit) $ 2 $ — $ (2 ) $ (2 ) Six Months Ended June 30, Pension Benefits Other Benefits 2019 2018 2019 2018 (In millions) Components of net periodic benefit cost (credit) Service cost $ 2 $ — $ — $ — Interest cost 14 12 1 1 Expected return on assets (18 ) (20 ) — — Recognized actuarial (gain) loss 7 8 (4 ) (4 ) Amortization of prior service credit — — (1 ) (1 ) Net periodic benefit cost (credit) $ 5 $ — $ (4 ) $ (4 ) Components of net periodic benefit cost (credit), excluding service cost, are included in Other income and (expense), net in our Condensed Consolidated Statement of Comprehensive Income. The Company has contributed $11.7 million to the pension plan fund through the six months ended June 30, 2019 and anticipates that it will have a minimum required pension contribution funding of approximately $14.0 million for the remaining six months of 2019.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 10: 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 an initial 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. In a change to its prior stance, at a meeting on December 4, 2018, the EPA announced that it expects potentially responsible parties to submit a plan during 2019 to start remediation of the river and harbor per the original ROD within the next two to three years. It also expects allocation of amounts among the parties to be determined in the same time frame. The EPA has stated that it is willing to consider de minimis and de micromis settlements, which JT Ryerson is trying to pursue; however, the EPA has not begun meeting with any of the smaller parties 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, 2019 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, 2019
Investments All Other Investments [Abstract]
Derivatives and Fair Value Measurements	NOTE 11: 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 two receive variable, pay fixed, interest rate swaps 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%, and in June 2019, we entered into a forward agreement for $60 million of “pay fixed” interest at 1.729%. 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 swaps as of June 30, 2019 was a net asset of $0.1 million. The Company currently does not account for its commodity 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 has made an accounting policy election to offset the fair value of derivative liabilities with related cash collateral. As of June 30, 2019 the Company offset $2.5 million of fair value liabilities with cash held as collateral by the counterparty. 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, 2019 and December 31, 2018: Asset Derivatives Liability Derivatives Balance Sheet Location June 30, 2019 December 31, 2018 Balance Sheet Location June 30, 2019 December 31, 2018 (In millions) Derivatives not designated as hedging instruments under ASC 815 Metal commodity contracts Prepaid expenses and other current assets $ 2.6 $ 1.6 Other accrued liabilities $ 10.5 (a) $ 5.4 Crude oil contracts Prepaid expenses and other current assets 0.8 — Other accrued liabilities — — Foreign exchange contracts Prepaid expenses and other current assets — 0.2 Other accrued liabilities — — Derivatives designated as hedging instruments under ASC 815 Interest rate swaps Deferred charges and other assets 0.3 1.5 Other noncurrent liabilities 0.2 — Total derivatives $ 3.7 $ 3.3 $ 10.7 $ 5.4 (a) Net of $2.5 million cash collateral The following table presents the volume of the Company’s activity in derivative instruments as of June 30, 2019 and December 31, 2018: Notional Amount Derivative Instruments At June 30, 2019 At December 31, 2018 Unit of Measurement Nickel swap contracts 247 1,541 Tons Hot roll coil swap contracts 36,886 36,365 Tons Aluminum swap contracts 21,777 42,419 Tons Zinc swap contracts 3,750 — Tons Iron ore swap contracts 360,000 — Tons Crude oil swap contracts 228,000 — Barrels Foreign currency exchange contracts 1.4 million 4.5 million U.S. dollars Interest rate swaps 210 million 150 million U.S. dollars 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, 2019 and 2018: 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 2019 2018 2019 2018 Metal commodity contracts Cost of materials sold $ (9.6 ) $ 1.7 $ (8.0 ) $ 1.3 Crude oil contracts Warehousing, delivery, selling, general, and administrative (0.2 ) — 0.7 — Foreign exchange contracts Other income and (expense), net — (0.1 ) (0.1 ) 0.1 Total $ (9.8 ) $ 1.6 $ (7.4 ) $ 1.4 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, 2019 and 2018: 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 2019 2018 2019 2018 (In millions) Interest rate swaps Interest and other expense on debt $ 0.3 $ 0.1 $ 0.6 $ 0.1 As of June 30, 2019, 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 $0.4 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, 2019: At June 30, 2019 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.6 $ — Crude oil contracts — 0.8 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 0.3 — Total derivatives $ — $ 3.7 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 10.5 (a) $ — Interest rate swaps — 0.2 — Total derivatives $ — $ 10.7 $ — (a) Net of $2.5 million cash collateral 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, 2018 : At December 31, 2018 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 1.6 $ — Foreign exchange contracts — 0.2 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 1.5 — Total derivatives $ — $ 3.3 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 5.4 $ — 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, crude oil, 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 (hot roll coil and crude oil), 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, 2019 and December 31, 2018 were as follows: At June 30, 2019 At December 31, 2018 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 22.8 $ 22.8 $ 23.2 $ 23.2 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provisions 552.5 552.5 521.0 521.0 Accounts payable 427.9 427.9 390.2 390.2 Long-term debt, including current portion 1,115.7 1,149.5 1,153.3 1,158.5 The estimated fair value of the Company’s cash and cash equivalents, receivables less provisions, 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).

Stockholders' Equity (Deficit),

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	NOTE 12: STOCKHOLDERS’ EQUITY (DEFICIT), ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), AND NONCONTROLLING INTEREST The following tables detail changes in these accounts for the three and six month periods ended June 30, 2019: Ryerson Holding Corporation Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Retained Earnings Foreign Currency Translation Benefit Plan Liabilities Cash Flow Hedge- Interest Rate Swap Non-controlling Interest Total Equity Shares Dollars Shares Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars (In millions, except shares in thousands) Balance at January 1, 2019 37,656 $ 0.4 213 $ (6.6 ) $ 381.0 $ 14.2 $ (52.8 ) $ (264.0 ) $ 1.0 $ 2.7 $ 75.9 Net income — — — — — 29.5 — — — 0.1 29.6 Foreign currency translation — — — — — — 2.9 — — 0.1 3.0 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 0.9 — — 0.9 Adoption of accounting principal ASC 842, net of tax of $1.1 — — — — — 3.0 — — — — 3.0 Stock-based compensation expense 10 — — — 0.8 — — — — — 0.8 Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — (0.4 ) — (0.4 ) Balance at March 31, 2019 37,666 0.4 213 (6.6 ) 381.8 46.7 (49.9 ) (263.1 ) 0.6 2.9 112.8 Net income — — — — — 16.4 — — — 0.1 16.5 Foreign currency translation — — — — — — 0.8 — — — 0.8 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 0.8 — — 0.8 Stock-based compensation expense 330 — — — 0.8 — — — — — 0.8 Purchase of subsidiary shares from noncontrolling interest — — — — (2.9 ) — — — — 2.9 — Cash flow hedge - interest rate swap, net of tax of $0.3 — — — — — — — — (0.6 ) — (0.6 ) Balance at June 30, 2019 37,996 $ 0.4 213 $ (6.6 ) $ 379.7 $ 63.1 $ (49.1 ) $ (262.3 ) $ — $ 5.9 $ 131.1 The following tables detail changes in these accounts for the three and six month periods ended June 30, 2018 : 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 — — — — — 10.4 — — — — 0.2 10.6 Foreign currency translation — — — — — — (1.4 ) — — — — (1.4 ) Foreign currency loss on intra-entity transactions — — — — — — (1.3 ) — — — — (1.3 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 1.0 — — — 1.0 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 — — — — 0.7 — — — — — — 0.7 Cash flow hedge - interest rate swap, net of tax of $0.2 — — — — — — — — — 0.7 — 0.7 Balance at March 31, 2018 37,421 0.4 213 (6.6 ) 378.3 (81.4 ) (44.3 ) (245.3 ) — 1.3 2.8 5.2 Net income — — — — — 17.5 — — — — (0.1 ) 17.4 Foreign currency translation — — — — — — (2.4 ) — — — 0.1 (2.3 ) Foreign currency loss on intra-entity transactions — — — — — — (1.0 ) — — — — (1.0 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.4 — — — — — — — 0.9 — — — 0.9 Stock-based compensation expense 87 — — — 1.0 — — — — — — 1.0 Purchase of subsidiary shares from noncontrolling interest — — — — 0.1 — — — — — (0.3 ) (0.2 ) Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — — 0.2 — 0.2 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, 2019: 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, 2019 $ (52.8 ) $ (264.0 ) $ 1.0 Other comprehensive income (loss) before reclassifications 3.5 — (0.5 ) Amounts reclassified from accumulated other comprehensive income into net income 0.2 1.7 (0.5 ) Net current-period other comprehensive income (loss) 3.7 1.7 (1.0 ) Balance at June 30, 2019 $ (49.1 ) $ (262.3 ) $ — The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2019: 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, 2019 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Foreign Currency Translation Foreign currency translation gain $ 0.2 $ 0.2 Other income and (expense), net Tax provision — — Net of tax $ 0.2 $ 0.2 Cash flow hedge - interest rate swap Realized swap interest loss $ (0.3 ) $ (0.6 ) Interest and other expense on debt Tax provision — 0.1 Net of tax $ (0.3 ) $ (0.5 ) Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial loss $ 1.9 $ 3.8 Warehousing, delivery, selling, general, and administrative Prior service credits (0.8 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax 1.1 2.3 Tax benefit (0.3 ) (0.6 ) Net of tax $ 0.8 $ 1.7 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 loss $ (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

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 1 3 : 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. 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 2019 2018 2019 2018 Carbon Steel Flat 25 % 28 % 25 % 27 % Carbon Steel Plate 11 11 12 11 Carbon Steel Long 16 12 16 12 Stainless Steel Flat 15 17 15 17 Stainless Steel Plate 4 4 4 4 Stainless Steel Long 4 4 4 4 Aluminum Flat 16 16 15 16 Aluminum Plate 2 3 2 3 Aluminum Long 5 4 5 4 Other 2 1 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 2019 2018 2019 2018 (In millions) United States $ 1,095.4 $ 938.7 $ 2,215.8 $ 1,774.0 Foreign countries 109.5 118.4 219.9 224.4 Total $ 1,204.9 $ 1,057.1 $ 2,435.7 $ 1,998.4 Revenue is recognized either at a point in time or over time based on if the contract has an enforceable right to payment and 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: Three Months Ended June 30, Six Months Ended June 30, Timing of Revenue Recognition 2019 2018 2019 2018 Revenue on products with an alternative use 88 % 88 % 88 % 89 % Revenue on products with no alternative use 12 12 12 11 Total 100 % 100 % 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 $555.9 million and $523.5 million as of June 30, 2019 and December 31, 2018, 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 , are reported in prepaid expenses and other current assets within the Condensed Consolidated Balance Sheet s . Contract liabilities, which consist primarily of accruals associated with amounts that will be paid to customers for volume rebates, cash discounts, sales returns and allowances, estimates of shipping and handling costs associated with performance obligations recorded over time , and bill and hold transactions are reported in other accrued liabilities within the Condensed Consolidated Balance Sheet s . Significant changes in the contract assets and the contract liabilities balances during the period are as follows: Contract Assets Contract Liabilities (In millions) Beginning Balance at January 1, 2019 $ 16.6 $ 10.0 Satisfied contract liability from beginning of the period — (4.5 ) Contract liability incurred during the period — 4.1 Net contract assets and liabilities added for products with no alternative during the period 0.3 — Changes to reserves (0.7 ) 0.3 Ending Balance at June 30, 2019 $ 16.2 $ 9.9 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.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 14: INCOME TAXES For the three months ended June 30, 2019, the Company recorded income tax expense of 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 $29.3 million at June 30, 2019 and December 31, 2018. The U.S. Tax Cuts and Jobs Act (the “Act”) subjects a U.S. 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. After considering the two options, the Company has elected to provide for the tax expense related to GILTI in the year the tax will occur.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 15: 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 2019 2018 2019 2018 (In millions, except share and per share data) Numerator: Net income attributable to Ryerson Holding Corporation $ 16.4 $ 17.5 $ 45.9 $ 27.9 Denominator: Weighted average shares outstanding 37,769,001 37,294,982 37,610,108 37,252,020 Dilutive effect of stock-based awards 149,338 330,769 270,176 333,151 Weighted average shares outstanding adjusted for dilutive securities 37,918,339 37,625,751 37,880,284 37,585,171 Earnings per share Basic $ 0.43 $ 0.47 $ 1.22 $ 0.75 Diluted $ 0.43 $ 0.46 $ 1.21 $ 0.74

Summary of Accounting and Finan

Summary of Accounting and Financial Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Impact of Recently Issued Accounting Standards—Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “ Leases ” codified in Accounting Standards Codification (“ASC”) 842, “ Leases ” (“ASC 842”). The guidance in ASU 2016- We adopted the standard effective January 1, 2019 using the alternative modified retrospective transition method, which allows 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. Adoption of the new standard resulted in the recording of operating lease assets and liabilities of $ 82.3 In February 2018, the FASB issued ASU 2018-02, “ Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. Impact of Recently Issued Accounting Standards—Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, “ Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. ” The standard and subsequently issued amendments require 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 August 2018, the FASB issued ASU 2018-13, “ Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. Measurement. The update is effective for interim and annual reporting periods beginning after December 15, 2019. The guidance allows for early adoption to remove or modify disclosures upon issuance of this amendment, and for delayed adoption of the additional disclosures until their effective date. We are still assessing the impact of adoption on our current fair value measurement disclosures. In August 2018, the FASB issued ASU 2018-14, “ Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans. In August 2018, the FASB issued ASU 2018-15, “ Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.
Leases	The Company leases various assets including real estate, trucks, trailers, mobile equipment, processing equipment, and IT equipment. The Company has noncancelable operating leases expiring at various times through 2029, and finance leases expiring at various times through 2025. Policy Elections & Practical Expedients The Company has made an accounting policy election not to record leases with an initial term of 12 months or less (“short term leases”) on the balance sheet as allowed within ASC 842. Short term lease expense is recognized on a straight-line basis over the lease term. The Company has elected to apply the practical expedient that allows for the combination of lease and non-lease components for all asset classes. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification for leases that existed at the transition date. Significant Judgments Many of our real estate leases include one or more options to renew, with renewal terms that can extend the lease term from one to 5 years or more. To determine the expected lease term, we include any noncancelable periods within the lease agreement as well as any periods covered by an option to extend the lease if we are reasonably certain to exercise the option. The equipment leases do not typically include options for renewal but do include options for purchase at the end of the lease. We determine the likelihood of exercising the option for purchase by assessing the option price versus the estimated fair value at the end of the lease term to determine if the option price is low enough that we are reasonably certain to exercise it. The depreciable life of finance lease assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Lease payments include fixed payments, the exercise price of a purchase option that is reasonably certain of exercise, variable payments based on a known index, and the amount probable that the Company will owe under a residual value guarantee. Variable lease payments that are not based on a known index are not included in lease payments and rather are expensed as incurred. For discount rates that are used to determine the amount of right of use assets, lease liabilities, and lease classification, the Company uses the interest rate implicit in the lease when known. If the rate implicit in the lease is not known, the Company will use its incremental borrowing rate defined as the interest rate swap rate that approximates the lease term plus the long-term expected spread on the $1.0 billion revolving credit facility amended as of June 28, 2018 (the “Ryerson Credit Facility”). We sublease certain real estate to third parties for facilities that we have closed.

Cash, Cash Equivalents, and R_2

Cash, Cash Equivalents, and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 2018 (In millions) Cash and cash equivalents $ 22.8 $ 23.2 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 23.9 $ 24.3

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories, at stated LIFO value, were classified at June 30, 2019 and December 31, 2018 as follows: June 30, December 31, 2019 2018 (In millions) In process and finished products $ 823.6 $ 806.3

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Summary of Location and Amount of Lease Assets and Lease Liabilities	The following table summarizes the location and amount of lease assets and lease liabilities reported in our Condensed Consolidated Balance Sheet as of June 30, 2019: June 30, Leases Balance Sheet Location 2019 (In millions) Assets Operating lease assets Operating lease assets $ 83.4 Finance lease assets Property, plant, and equipment, net (a) 56.1 Total lease assets $ 139.5 Liabilities Current Operating Current portion of operating lease liabilities $ 17.8 Finance Other accrued liabilities 13.5 Noncurrent Operating Noncurrent operating lease liabilities 71.2 Finance Other noncurrent liabilities 23.3 Total lease liabilities $ 125.8 (a) Finance lease assets are recorded net of accumulated amortization of $18.0 million as of June 30, 2019.
Summary of Location and Amount of Lease Expense	The following table summarizes the location and amount of lease expense reported in our Condensed Consolidated Statement of Comprehensive Income for the three and six month periods ended June 30, 2019: Three Months Ended June 30, Six Months Ended June 30, Lease Expense Location of Lease Expense Recognized in Income 2019 2019 (In millions) Operating lease expense Warehousing, delivery, selling, general, and administrative $ 5.5 $ 11.1 Finance lease expense Amortization of lease assets Warehousing, delivery, selling, general, and administrative 1.8 3.4 Interest on lease liabilities Interest and other expense on debt 0.5 0.9 Variable lease expense Warehousing, delivery, selling, general, and administrative 0.7 1.4 Short-term lease expense Warehousing, delivery, selling, general, and administrative 0.6 1.1 Total lease expense $ 9.1 $ 17.9
Schedule of Maturity Analysis of Lease Liabilities	The following table presents maturity analysis of lease liabilities at June 30, 2019 : Maturity of Lease Liabilities Operating Leases (a) Finance Leases (In millions) 2019 $ 10.7 $ 8.1 2020 20.3 13.5 2021 18.1 8.4 2022 14.4 4.8 2023 11.2 2.8 After 2023 24.6 2.3 Total lease payments 99.3 39.9 Less: Interest (b) (10.3 ) (3.1 ) Present value of lease liabilities (c) $ 89.0 $ 36.8 (a) There were no operating leases with options to extend lease terms that are reasonably certain of being exercised and the operating lease payments exclude $0.3 million of legally binding minimum lease payments for leases signed but not yet commenced. (b) Calculated using the discount rate for each lease. (c) Includes the current portion of $17.8 million for operating leases and $13.5 million for finance leases.
Schedule of Weighted-Average Remaining Lease Term and Discount Rate for Operating and Finance Leases	The following table shows the weighted-average remaining lease term and discount rate for operating and finance leases, respectively, at June 30, 2019: June 30, Lease Term and Discount Rate 2019 Weighted-average remaining lease term (years) Operating leases 5.7 Finance leases 2.9 Weighted-average discount rate Operating leases 3.8 % Finance leases 4.9 %
Schedule of Other Information Reported in Condensed Consolidated Statement of Cash Flows	Other information reported in our Condensed Consolidated Statement of Cash Flows for the six months ended June 30, 2019 is summarized below: Six Months Ended June 30, Other Information 2019 (In millions) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 10.1 Operating cash flows from finance leases 0.9 Financing cash flows from finance leases 6.3 Assets obtained in exchange for lease obligations: Adoption of accounting principal ASC 842 82.3 Operating leases 10.8 Finance leases 0.6

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date. At July 2, 2018 (In millions) Cash and cash equivalents $ 10.0 Receivables, less provisions 80.0 Inventories 179.8 Prepaid expenses and other current assets 1.7 Property, plant, and equipment 66.5 Other intangible assets 16.1 Total identifiable assets acquired 354.1 Accounts payable (49.7 ) Salaries, wages, and commissions (4.9 ) Other accrued liabilities (6.5 ) Deferred income taxes (27.7 ) Deferred employee benefits (31.8 ) Total liabilities assumed (120.6 ) Net identifiable assets acquired 233.5 Bargain purchase gain (70.0 ) Total purchase price $ 163.5
Summary of Unaudited Pro forma Information Presents Consolidated Results of Operation	The following unaudited pro forma information presents consolidated results of operations for the three-month and six-month periods ended June 30, 2019 and 2018 as if the acquisition of CS&W on July 2, 2018 had occurred on January 1, 2018: Pro Forma Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In millions) Net sales $ 1,204.9 $ 1,245.3 $ 2,435.7 $ 2,357.7 Net income attributable to Ryerson Holding Corporation 16.4 2.7 45.9 9.4

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-term debt consisted of the following at June 30, 2019 and December 31, 2018: June 30, December 31, 2019 2018 (In millions) Ryerson Credit Facility $ 511.9 $ 535.9 11.00% Senior Secured Notes due 2022 587.9 599.5 Foreign debt 13.7 19.5 Other debt 10.3 8.3 Unamortized debt issuance costs and discounts (8.1 ) (9.9 ) Total debt 1,115.7 1,153.3 Less: Short-term foreign debt 13.7 19.5 Less: Other short-term debt 1.7 7.8 Total long-term debt $ 1,100.3 $ 1,126.0

Employee Benefits (Tables)

Employee Benefits (Tables)	6 Months Ended
	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Benefit Cost (Credit)	The following table summarizes the components of net periodic benefit cost (credit) for the three and six month periods ended June 30, 2019 and 2018 for the Ryerson pension plans and postretirement benefits other than pension: Three Months Ended June 30, Pension Benefits Other Benefits 2019 2018 2019 2018 (In millions) Components of net periodic benefit cost (credit) Service cost $ 1 $ — $ — $ — Interest cost 7 6 — — Expected return on assets (9 ) (10 ) — — Recognized actuarial (gain) loss 3 4 (2 ) (2 ) Net periodic benefit cost (credit) $ 2 $ — $ (2 ) $ (2 ) Six Months Ended June 30, Pension Benefits Other Benefits 2019 2018 2019 2018 (In millions) Components of net periodic benefit cost (credit) Service cost $ 2 $ — $ — $ — Interest cost 14 12 1 1 Expected return on assets (18 ) (20 ) — — Recognized actuarial (gain) loss 7 8 (4 ) (4 ) Amortization of prior service credit — — (1 ) (1 ) Net periodic benefit cost (credit) $ 5 $ — $ (4 ) $ (4 )

Derivatives and Fair Value Me_2

Derivatives and Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 and December 31, 2018: Asset Derivatives Liability Derivatives Balance Sheet Location June 30, 2019 December 31, 2018 Balance Sheet Location June 30, 2019 December 31, 2018 (In millions) Derivatives not designated as hedging instruments under ASC 815 Metal commodity contracts Prepaid expenses and other current assets $ 2.6 $ 1.6 Other accrued liabilities $ 10.5 (a) $ 5.4 Crude oil contracts Prepaid expenses and other current assets 0.8 — Other accrued liabilities — — Foreign exchange contracts Prepaid expenses and other current assets — 0.2 Other accrued liabilities — — Derivatives designated as hedging instruments under ASC 815 Interest rate swaps Deferred charges and other assets 0.3 1.5 Other noncurrent liabilities 0.2 — Total derivatives $ 3.7 $ 3.3 $ 10.7 $ 5.4 (a) Net of $2.5 million cash collateral
Volume of Company 's Activity in Derivative Instruments	The following table presents the volume of the Company’s activity in derivative instruments as of June 30, 2019 and December 31, 2018: Notional Amount Derivative Instruments At June 30, 2019 At December 31, 2018 Unit of Measurement Nickel swap contracts 247 1,541 Tons Hot roll coil swap contracts 36,886 36,365 Tons Aluminum swap contracts 21,777 42,419 Tons Zinc swap contracts 3,750 — Tons Iron ore swap contracts 360,000 — Tons Crude oil swap contracts 228,000 — Barrels Foreign currency exchange contracts 1.4 million 4.5 million U.S. dollars Interest rate swaps 210 million 150 million U.S. dollars
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, 2019 and 2018: 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 2019 2018 2019 2018 Metal commodity contracts Cost of materials sold $ (9.6 ) $ 1.7 $ (8.0 ) $ 1.3 Crude oil contracts Warehousing, delivery, selling, general, and administrative (0.2 ) — 0.7 — Foreign exchange contracts Other income and (expense), net — (0.1 ) (0.1 ) 0.1 Total $ (9.8 ) $ 1.6 $ (7.4 ) $ 1.4
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, 2019 and 2018: 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 2019 2018 2019 2018 (In millions) Interest rate swaps Interest and other expense on debt $ 0.3 $ 0.1 $ 0.6 $ 0.1
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, 2019: At June 30, 2019 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 2.6 $ — Crude oil contracts — 0.8 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 0.3 — Total derivatives $ — $ 3.7 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 10.5 (a) $ — Interest rate swaps — 0.2 — Total derivatives $ — $ 10.7 $ — (a) Net of $2.5 million cash collateral 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, 2018 : At December 31, 2018 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 1.6 $ — Foreign exchange contracts — 0.2 — Derivatives designated as hedging instruments under ASC 815: Interest rate swaps — 1.5 — Total derivatives $ — $ 3.3 $ — Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 5.4 $ —
Carrying and Estimated Fair Values of Financial Instruments	The carrying and estimated fair values of our financial instruments at June 30, 2019 and December 31, 2018 were as follows: At June 30, 2019 At December 31, 2018 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 22.8 $ 22.8 $ 23.2 $ 23.2 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provisions 552.5 552.5 521.0 521.0 Accounts payable 427.9 427.9 390.2 390.2 Long-term debt, including current portion 1,115.7 1,149.5 1,153.3 1,158.5

Stockholders' Equity (Deficit_2

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Change in Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	The following tables detail changes in these accounts for the three and six month periods ended June 30, 2019: Ryerson Holding Corporation Stockholders' Equity (Deficit) Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Retained Earnings Foreign Currency Translation Benefit Plan Liabilities Cash Flow Hedge- Interest Rate Swap Non-controlling Interest Total Equity Shares Dollars Shares Dollars Dollars Dollars Dollars Dollars Dollars Dollars Dollars (In millions, except shares in thousands) Balance at January 1, 2019 37,656 $ 0.4 213 $ (6.6 ) $ 381.0 $ 14.2 $ (52.8 ) $ (264.0 ) $ 1.0 $ 2.7 $ 75.9 Net income — — — — — 29.5 — — — 0.1 29.6 Foreign currency translation — — — — — — 2.9 — — 0.1 3.0 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 0.9 — — 0.9 Adoption of accounting principal ASC 842, net of tax of $1.1 — — — — — 3.0 — — — — 3.0 Stock-based compensation expense 10 — — — 0.8 — — — — — 0.8 Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — (0.4 ) — (0.4 ) Balance at March 31, 2019 37,666 0.4 213 (6.6 ) 381.8 46.7 (49.9 ) (263.1 ) 0.6 2.9 112.8 Net income — — — — — 16.4 — — — 0.1 16.5 Foreign currency translation — — — — — — 0.8 — — — 0.8 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 0.8 — — 0.8 Stock-based compensation expense 330 — — — 0.8 — — — — — 0.8 Purchase of subsidiary shares from noncontrolling interest — — — — (2.9 ) — — — — 2.9 — Cash flow hedge - interest rate swap, net of tax of $0.3 — — — — — — — — (0.6 ) — (0.6 ) Balance at June 30, 2019 37,996 $ 0.4 213 $ (6.6 ) $ 379.7 $ 63.1 $ (49.1 ) $ (262.3 ) $ — $ 5.9 $ 131.1 The following tables detail changes in these accounts for the three and six month periods ended June 30, 2018 : 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 — — — — — 10.4 — — — — 0.2 10.6 Foreign currency translation — — — — — — (1.4 ) — — — — (1.4 ) Foreign currency loss on intra-entity transactions — — — — — — (1.3 ) — — — — (1.3 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.3 — — — — — — — 1.0 — — — 1.0 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 — — — — 0.7 — — — — — — 0.7 Cash flow hedge - interest rate swap, net of tax of $0.2 — — — — — — — — — 0.7 — 0.7 Balance at March 31, 2018 37,421 0.4 213 (6.6 ) 378.3 (81.4 ) (44.3 ) (245.3 ) — 1.3 2.8 5.2 Net income — — — — — 17.5 — — — — (0.1 ) 17.4 Foreign currency translation — — — — — — (2.4 ) — — — 0.1 (2.3 ) Foreign currency loss on intra-entity transactions — — — — — — (1.0 ) — — — — (1.0 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.4 — — — — — — — 0.9 — — — 0.9 Stock-based compensation expense 87 — — — 1.0 — — — — — — 1.0 Purchase of subsidiary shares from noncontrolling interest — — — — 0.1 — — — — — (0.3 ) (0.2 ) Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — — 0.2 — 0.2 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, 2019: 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, 2019 $ (52.8 ) $ (264.0 ) $ 1.0 Other comprehensive income (loss) before reclassifications 3.5 — (0.5 ) Amounts reclassified from accumulated other comprehensive income into net income 0.2 1.7 (0.5 ) Net current-period other comprehensive income (loss) 3.7 1.7 (1.0 ) Balance at June 30, 2019 $ (49.1 ) $ (262.3 ) $ —
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, 2019: 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, 2019 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Foreign Currency Translation Foreign currency translation gain $ 0.2 $ 0.2 Other income and (expense), net Tax provision — — Net of tax $ 0.2 $ 0.2 Cash flow hedge - interest rate swap Realized swap interest loss $ (0.3 ) $ (0.6 ) Interest and other expense on debt Tax provision — 0.1 Net of tax $ (0.3 ) $ (0.5 ) Amortization of defined benefit pension and other post- retirement benefit plan items Actuarial loss $ 1.9 $ 3.8 Warehousing, delivery, selling, general, and administrative Prior service credits (0.8 ) (1.5 ) Warehousing, delivery, selling, general, and administrative Total before tax 1.1 2.3 Tax benefit (0.3 ) (0.6 ) Net of tax $ 0.8 $ 1.7 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 loss $ (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

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue Recognition [Abstract]
Summary of Disaggregated Revenue	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 2019 2018 2019 2018 Carbon Steel Flat 25 % 28 % 25 % 27 % Carbon Steel Plate 11 11 12 11 Carbon Steel Long 16 12 16 12 Stainless Steel Flat 15 17 15 17 Stainless Steel Plate 4 4 4 4 Stainless Steel Long 4 4 4 4 Aluminum Flat 16 16 15 16 Aluminum Plate 2 3 2 3 Aluminum Long 5 4 5 4 Other 2 1 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 2019 2018 2019 2018 (In millions) United States $ 1,095.4 $ 938.7 $ 2,215.8 $ 1,774.0 Foreign countries 109.5 118.4 219.9 224.4 Total $ 1,204.9 $ 1,057.1 $ 2,435.7 $ 1,998.4 Revenue is recognized either at a point in time or over time based on if the contract has an enforceable right to payment and 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: Three Months Ended June 30, Six Months Ended June 30, Timing of Revenue Recognition 2019 2018 2019 2018 Revenue on products with an alternative use 88 % 88 % 88 % 89 % Revenue on products with no alternative use 12 12 12 11 Total 100 % 100 % 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: Contract Assets Contract Liabilities (In millions) Beginning Balance at January 1, 2019 $ 16.6 $ 10.0 Satisfied contract liability from beginning of the period — (4.5 ) Contract liability incurred during the period — 4.1 Net contract assets and liabilities added for products with no alternative during the period 0.3 — Changes to reserves (0.7 ) 0.3 Ending Balance at June 30, 2019 $ 16.2 $ 9.9

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
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 2019 2018 2019 2018 (In millions, except share and per share data) Numerator: Net income attributable to Ryerson Holding Corporation $ 16.4 $ 17.5 $ 45.9 $ 27.9 Denominator: Weighted average shares outstanding 37,769,001 37,294,982 37,610,108 37,252,020 Dilutive effect of stock-based awards 149,338 330,769 270,176 333,151 Weighted average shares outstanding adjusted for dilutive securities 37,918,339 37,625,751 37,880,284 37,585,171 Earnings per share Basic $ 0.43 $ 0.47 $ 1.22 $ 0.75 Diluted $ 0.43 $ 0.46 $ 1.21 $ 0.74

Financial Statements - Addition

Financial Statements - Additional Information (Detail)	Jun. 30, 2019shares
Accounting Policies [Abstract]
Parent company shares owned by affiliates	21,037,500
Parent company percentage owned by affiliates	56.00%

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions		Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Recent Accounting Pronouncements [Line Items]
Operating lease assets		$ 83.4
Operating lease liabilities	[1],[2]	89
Retained earnings		$ 63.1		$ 14.2
ASU 2016-02 [Member]
Recent Accounting Pronouncements [Line Items]
Operating lease assets			$ 82.3
Operating lease liabilities			87.6
Retained earnings			$ 3
[1]	Includes the current portion of $17.8 million for operating leases and $13.5 million for finance leases.
[2]	There were no operating leases with options to extend lease terms that are reasonably certain of being exercised and the operating lease payments exclude $0.3 million of legally binding minimum lease payments for leases signed but not yet commenced.

Cash, Cash Equivalents, and R_3

Cash, Cash Equivalents, and Restricted Cash - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 22.8	$ 23.2
Restricted cash	1.1	1.1
Total cash, cash equivalents, and restricted cash	$ 23.9	$ 24.3

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
In process and finished products	$ 823.6	$ 806.3

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at current cost	$ (15)	$ 18
Inventories accounted under the LIFO method	91.00%	91.00%
Consignment inventory	$ 8.5	$ 9.3

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 28, 2018
Lessee Lease Description [Line Items]
Real estate leases option to renew description	Many of our real estate leases include one or more options to renew, with renewal terms that can extend the lease term from one to 5 years or more.  To determine the expected lease term, we include any noncancelable periods within the lease agreement as well as any periods covered by an option to extend the lease if we are reasonably certain to exercise the option. The equipment leases do not typically include options for renewal but do include options for purchase at the end of the lease. We determine the likelihood of exercising the option for purchase by assessing the option price versus the estimated fair value at the end of the lease term to determine if the option price is low enough that we are reasonably certain to exercise it. The depreciable life of finance lease assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise.
Real estate leases, Existence of option to extend [true false]	true
Ryerson Credit Facility [Member]
Lessee Lease Description [Line Items]
Revolving credit facility maximum borrowing capacity		$ 1,000,000,000
Maximum [Member]
Lessee Lease Description [Line Items]
Noncancelable operating leases expire period	2029
Finance leases expire period	2025
Real estate leases option to extend lease term	5 years
Minimum [Member]
Lessee Lease Description [Line Items]
Real estate leases option to extend lease term	1 year

Leases - Summary of Location an

Leases - Summary of Location and Amount of Lease Assets and Lease Liabilities (Detail) $ in Millions	Jun. 30, 2019USD ($)
Assets
Operating lease assets	$ 83.4
Finance lease assets	$ 56.1
Finance lease, Right-of-use asset, Statement of financial position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet	[1]
Total lease assets	$ 139.5
Liabilities
Operating lease liabilities, current	17.8
Finance lease liabilities, current	$ 13.5
Finance lease, Liability, Current, Statement of financial position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent
Operating lease liabilities, noncurrent	$ 71.2
Finance lease liabilities, noncurrent	$ 23.3
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities	$ 125.8
[1]	Finance lease assets are recorded net of accumulated amortization of $18.0 million as of June 30, 2019.

Leases - Summary of Location _2

Leases - Summary of Location and Amount of Lease Assets and Lease Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Accumulated amortization	$ 369.9	$ 349.4
Finance Lease [Member]
Lessee Lease Description [Line Items]
Accumulated amortization	$ 18

Leases - Summary of Location _3

Leases - Summary of Location and Amount of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Finance lease expense
Total lease expense	$ 9.1	$ 17.9
Warehousing, Delivery, Selling, General, and Administrative [Member]
Lessee Lease Description [Line Items]
Operating lease expense	5.5	11.1
Finance lease expense
Amortization of lease assets	1.8	3.4
Variable lease expense	0.7	1.4
Short-term lease expense	0.6	1.1
Interest and Other Expense on Debt [Member]
Finance lease expense
Interest on lease liabilities	$ 0.5	$ 0.9

Leases - Schedule of Maturity A

Leases - Schedule of Maturity Analysis of Lease Liabilities (Detail) $ in Millions	Jun. 30, 2019USD ($)
Operating Leases
2019	$ 10.7	[1]
2020	20.3	[1]
2021	18.1	[1]
2022	14.4	[1]
2023	11.2	[1]
After 2023	24.6	[1]
Total lease payments	99.3	[1]
Less: Interest	(10.3)	[1],[2]
Present value of lease liabilities	89	[1],[3]
Finance Leases
2019	8.1
2020	13.5
2021	8.4
2022	4.8
2023	2.8
After 2023	2.3
Total lease payments	39.9
Less: Interest	(3.1)	[2]
Present value of lease liabilities	$ 36.8	[3]
[1]	There were no operating leases with options to extend lease terms that are reasonably certain of being exercised and the operating lease payments exclude $0.3 million of legally binding minimum lease payments for leases signed but not yet commenced.
[2]	Calculated using the discount rate for each lease.
[3]	Includes the current portion of $17.8 million for operating leases and $13.5 million for finance leases.

Leases - Schedule of Maturity_2

Leases - Schedule of Maturity Analysis of Lease Liabilities (Parenthetical) (Detail)	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating leases with options to extend lease terms that are reasonably certain of being exercised	$ 0
Legally binding minimum lease payments for leases signed but not yet commenced	300,000
Operating leases, current portion	17,800,000
Finance leases, current portion	$ 13,500,000

Leases - Schedule of Weighted-A

Leases - Schedule of Weighted-Average Remaining Lease Term and Discount Rate for Operating and Finance Leases (Detail)	Jun. 30, 2019
Leases [Abstract]
Operating leases, Weighted-average remaining lease term	5 years 8 months 12 days
Finance leases, Weighted-average remaining lease term	2 years 10 months 24 days
Operating leases, Weighted-average discount rate	3.80%
Finance leases, Weighted-average discount rate	4.90%

Leases - Schedule of Other Info

Leases - Schedule of Other Information Reported in Condensed Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 10.1
Operating cash flows from finance leases	0.9
Financing cash flows from finance leases	6.3	$ 5.9
Assets obtained in exchange for lease obligations:
Adoption of accounting principal ASC 842	82.3
Operating leases	10.8
Finance leases	0.6	$ 9.4
ASU 2016-02 [Member]
Assets obtained in exchange for lease obligations:
Adoption of accounting principal ASC 842	$ 82.3

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 120,300,000	$ 120,300,000
Impairment charge	0
Goodwill recognized from business acquisitions	$ 0

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Millions	Jul. 02, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Revenue		$ 1,204.9	$ 1,057.1	$ 2,435.7		$ 1,998.4
Net income (loss)		16.4	$ 17.5	$ 45.9		$ 27.9
Central Steel & Wire Company [Member]
Business Acquisition [Line Items]
Effective date of acquisition				Jul. 2, 2018
Description of business acquisition				On July 2, 2018 (“the acquisition date”) JT Ryerson purchased Central Steel & Wire Company (“CS&W”). CS&W is a leading metal service center with locations across the Central and Eastern United States offering a wide selection of products and capabilities, with a commercial portfolio centered on bar, tube, plate, and steel products.
Business combination, fair value of consideration	$ 163.5
Business combination, fair value of accounts receivables acquired	80
Business combination, accounts receivables acquired, gross	81.8
Business combination, accounts receivables, expected uncollectible	1.8
Bargain purchase gain	70
Business combination, acquisition related fees					$ 1.6
Revenue		154.3		$ 326.5
Net income (loss)		$ (1.4)		$ 2.2
Central Steel & Wire Company [Member] | Other Income and (Expense), Net [Member]
Business Acquisition [Line Items]
Bargain purchase gain					$ 70
Central Steel & Wire Company [Member] | Trademark [Member]
Business Acquisition [Line Items]
Intangibles assets recognized from business acquisitions	$ 16.1
Business combination, useful life of intangible assets acquired	10 years
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.

Acquisitions - Summary of Estim

Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - Central Steel & Wire Company [Member] $ in Millions	Jul. 02, 2018USD ($)
Business Acquisition [Line Items]
Cash and cash equivalents	$ 10
Receivables, less provisions	80
Inventories	179.8
Prepaid expenses and other current assets	1.7
Property, plant, and equipment	66.5
Other intangible assets	16.1
Total identifiable assets acquired	354.1
Accounts payable	(49.7)
Salaries, wages, and commissions	(4.9)
Other accrued liabilities	(6.5)
Deferred income taxes	(27.7)
Deferred employee benefits	(31.8)
Total liabilities assumed	(120.6)
Net identifiable assets acquired	233.5
Bargain purchase gain	(70)
Total purchase price	$ 163.5

Acquisitions - Summary of Unaud

Acquisitions - Summary of Unaudited Pro Forma Information Presents Consolidated Results of Operation (Detail) - Central Steel & Wire Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Net sales	$ 1,204.9	$ 1,245.3	$ 2,435.7	$ 2,357.7
Net income attributable to Ryerson Holding Corporation	$ 16.4	$ 2.7	$ 45.9	$ 9.4

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Foreign debt	$ 13.7	$ 19.5
Other debt	10.3	8.3
Unamortized debt issuance costs and discounts	(8.1)	(9.9)
Total debt	1,115.7	1,153.3
Less: Other short-term debt	1.7	7.8
Total long-term debt	1,100.3	1,126
2022 Notes [Member]
Debt Instrument [Line Items]
11.00% Senior Secured Notes due 2022	587.9	599.5
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Ryerson Credit Facility	$ 511.9	$ 535.9

Long-Term Debt - Ryerson Credit

Long-Term Debt - Ryerson Credit Facility - Additional Information (Detail) - USD ($)	Nov. 16, 2016	Mar. 31, 2017	Jun. 30, 2019	Dec. 31, 2018	Jun. 28, 2018
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity					$ 1,000,000,000
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%
Outstanding borrowings			$ 511,900,000	$ 535,900,000
Letters of credit			12,000,000	12,000,000
Available credit facility			$ 395,000,000	$ 392,000,000
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		2017-03
Hedged debt amount		$ 150,000,000
Derivative fixed interest rate		1.658%
Derivative maturity period		2020-03
Weighted average interest rate				3.50%
Ryerson Credit Facility [Member] | Second Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest rate swap agreement date			2019-06
Hedged debt amount			$ 60,000,000
Derivative fixed interest rate			1.729%
Derivative maturity period			2022-06
Ryerson Credit Facility [Member] | All Interest Rate Swap [Member]
Debt Instrument [Line Items]
Weighted average interest rate			3.40%
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

Long-Term Debt - 2022 Notes - A

Long-Term Debt - 2022 Notes - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	May 24, 2016
Debt Instrument [Line Items]
Gain (loss) on retirement of debt	$ (200,000)
2022 Notes [Member]
Debt Instrument [Line Items]
Aggregate amount of senior notes issued			$ 650,000,000
Debt Instrument Percentage			11.00%
Principal amount of debt instrument repurchased	11,600,000	$ 50,500,000
Debt instruments senior notes retired	$ 11,800,000	$ 52,200,000
2022 Notes [Member] | Joseph T. Ryerson [Member]
Debt Instrument [Line Items]
Maximum percentage of dividend of cumulative net income	50.00%
2022 Notes [Member] | Redeemable in twelve months beginning May 15, 2019 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	105.50%
2022 Notes [Member] | Redeemable in twelve months beginning May 15, 2020 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount	102.75%
2022 Notes [Member] | 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%
2022 Notes [Member] | Other Income and (Expense), Net [Member]
Debt Instrument [Line Items]
Gain (loss) on retirement of debt	$ (200,000)

Long-Term Debt - Foreign Debt -

Long-Term Debt - Foreign Debt - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Foreign debt	$ 13.7	$ 19.5
Foreign Debt [Member]
Debt Instrument [Line Items]
Available credit facility	32	26
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	$ 13.7	$ 19.5
Weighted average interest rate	4.30%	4.30%

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1		$ 2
Interest cost	7	$ 6	14	$ 12
Expected return on assets	(9)	(10)	(18)	(20)
Recognized actuarial (gain) loss	3	4	7	8
Net periodic benefit cost (credit)	2		5
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 cost (credit)	$ (2)	$ (2)	$ (4)	$ (4)

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Compensation And Retirement Disclosure [Abstract]
Contribution to the pension plan fund	$ 11.7
Anticipated minimum required pension contribution funding for the remainder of fiscal period	$ 14

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Jan. 06, 2017	Jun. 30, 2019
Loss Contingencies [Line Items]
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
Minimum [Member]
Loss Contingencies [Line Items]
Loss contingency on remediation plan of original ROD period		2 years
Maximum [Member]
Loss Contingencies [Line Items]
Loss contingency on remediation plan of original ROD period		3 years

Derivatives and Fair Value Me_3

Derivatives and Fair Value Measurements - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)DerivativeInstrument	Dec. 31, 2018USD ($)	Mar. 31, 2017USD ($)
Derivatives Fair Value [Line Items]
Fair value of interest rate swaps	$ 0.1
Derivative liabilities, offset against cash collateral	$ 2.5
Minimum [Member]
Derivatives Fair Value [Line Items]
General term for commodity and exchange contracts	3 months
Maximum [Member]
Derivatives Fair Value [Line Items]
General term for commodity and exchange contracts	12 months
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount	$ 210	$ 150
Derivative gain (loss) to be reclassified into interest income during next 12 months	$ 0.4
Ryerson Credit Facility [Member]
Derivatives Fair Value [Line Items]
Number of derivative instruments | DerivativeInstrument	2
Ryerson Credit Facility [Member] | Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount			$ 150
Derivative fixed interest rate			1.658%
Ryerson Credit Facility [Member] | Second Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount	$ 60
Derivative fixed interest rate	1.729%

Derivatives and Fair Value Me_4

Derivatives and Fair Value Measurements - Location and Fair Value Amount of Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2019		Dec. 31, 2018
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 3.7		$ 3.3
Liability Derivatives, Fair Value	10.7		5.4
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		1.6
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	10.5	[1]	5.4
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Crude Oil Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	0.8
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
Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swaps [Member] | Deferred charges and other assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	0.3		$ 1.5
Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swaps [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 0.2
[1]	Net of $2.5 million cash collateral

Derivatives and Fair Value Me_5

Derivatives and Fair Value Measurements - Location and Fair Value Amount of Derivative Instruments (Parenthetical) (Detail) $ in Millions	Jun. 30, 2019USD ($)
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Other Accrued Liabilities [Member] | Metal Commodity Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative liabilities, cash collateral	$ 2.5

Derivatives and Fair Value Me_6

Derivatives and Fair Value Measurements - Volume of Company 's Activity in Derivative Instruments (Detail) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)Tbbl	Dec. 31, 2018USD ($)T
Nickel Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value	247	1,541
Hot Roll Coil Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value	36,886	36,365
Aluminum Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value	21,777	42,419
Zinc Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value	3,750
Iron Ore Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value	360,000
Crude Oil Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments, Notional Value | bbl	228,000
Foreign Exchange Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 1.4	$ 4.5
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 210	$ 150

Derivatives and Fair Value Me_7

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives			$ (5.7)	$ 1.5
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	$ (9.8)	$ 1.6	(7.4)	1.4
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	(9.6)	1.7	(8)	1.3
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Crude Oil Contracts [Member] | Warehousing, Delivery, Selling, General, and Administrative [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	$ (0.2)		0.7
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

Derivatives and Fair Value Me_8

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swaps [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	$ 0.3	$ 0.1	$ 0.6	$ 0.1

Derivatives and Fair Value Me_9

Derivatives and Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value (Detail) - USD ($) $ in Millions	Jun. 30, 2019		Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	$ 3.7		$ 3.3
Liability Derivatives, Fair Value	10.7		5.4
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	3.7		3.3
Liability Derivatives, Fair Value	10.7
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		1.6
Liability Derivatives, Fair Value	10.5	[1]	5.4
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Crude Oil Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	0.8
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Interest Rate Swaps [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability Derivatives, Fair Value	0.2
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
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivatives designated as hedging instruments under ASC 815 [Member] | Interest Rate Swaps [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	$ 0.3		$ 1.5
[1]	Net of $2.5 million cash collateral

Derivatives and Fair Value M_10

Derivatives and Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value (Parenthetical) (Detail) $ in Millions	Jun. 30, 2019USD ($)
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Level 2 [Member] | Metal Commodity Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities, cash collateral	$ 2.5

Derivatives and Fair Value M_11

Derivatives and Fair Value Measurements - Carrying and Estimated Fair Values Financial Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Carrying Amount [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	$ 22.8	$ 23.2
Restricted cash	1.1	1.1
Receivables less provisions	552.5	521
Accounts payable	427.9	390.2
Long-term debt, including current portion	1,115.7	1,153.3
Fair Value [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	22.8	23.2
Restricted cash	1.1	1.1
Receivables less provisions	552.5	521
Accounts payable	427.9	390.2
Long-term debt, including current portion	$ 1,149.5	$ 1,158.5

Stockholders' Equity (Deficit_3

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, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Beginning Balance	$ 112.8	$ 75.9	$ 5.2	$ (7.4)	$ 75.9	$ (7.4)
Beginning Balance, shares		37,656,505			37,656,505
Beginning Balance Treasury Stock, shares		212,500			212,500
Net income	16.5	$ 29.6	17.4	10.6	$ 46.1	28
Foreign currency translation	0.8	3	(2.3)	(1.4)
Foreign currency loss on intra-entity transactions			(1)	(1.3)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax	0.8	0.9	0.9	1
Stock-based compensation expense	0.8	0.8	1	0.7
Purchase of subsidiary shares from noncontrolling interest			(0.2)
Cash flow hedge - interest rate swap, net of tax	(0.6)	(0.4)	0.2	0.7
Ending Balance	$ 131.1	112.8	21.2	5.2	$ 131.1	21.2
Ending Balance, shares	37,996,261				37,996,261
Ending Balance Treasury Stock, shares	212,500				212,500
ASC 842 [Member]
Adoption of accounting principal		3
ASC 606 [Member]
Adoption of accounting principal				2.3
Common Stock [Member]
Beginning Balance	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4
Beginning Balance, shares	37,666,000	37,656,000	37,421,000	37,421,000	37,656,000	37,421,000
Stock-based compensation expense, shares	330,000	10,000	87,000
Ending Balance	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4
Ending Balance, shares	37,996,000	37,666,000	37,508,000	37,421,000	37,996,000	37,508,000
Treasury Stock [Member]
Beginning Balance	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)
Beginning Balance Treasury Stock, shares	213,000	213,000	213,000	213,000	213,000	213,000
Ending Balance	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)
Ending Balance Treasury Stock, shares	213,000	213,000	213,000	213,000	213,000	213,000
Capital in Excess of Par Value [Member]
Beginning Balance	$ 381.8	$ 381	$ 378.3	$ 377.6	$ 381	$ 377.6
Stock-based compensation expense	0.8	0.8	1	0.7
Purchase of subsidiary shares from noncontrolling interest	(2.9)		0.1
Ending Balance	379.7	381.8	379.4	378.3	379.7	379.4
Retained Earnings (Accumulated Deficit) [Member]
Beginning Balance	46.7	14.2	(81.4)	(95.1)	14.2	(95.1)
Net income	16.4	29.5	17.5	10.4
Ending Balance	63.1	46.7	(63.9)	(81.4)	63.1	(63.9)
Retained Earnings (Accumulated Deficit) [Member] | ASC 842 [Member]
Adoption of accounting principal		3
Retained Earnings (Accumulated Deficit) [Member] | ASU 2016-01 [Member]
Adoption of accounting principal				1
Retained Earnings (Accumulated Deficit) [Member] | ASC 606 [Member]
Adoption of accounting principal				2.3
Foreign Currency Translation [Member]
Beginning Balance	(49.9)	(52.8)	(44.3)	(41.6)	(52.8)	(41.6)
Foreign currency translation	0.8	2.9	(2.4)	(1.4)
Foreign currency loss on intra-entity transactions			(1)	(1.3)
Ending Balance	(49.1)	(49.9)	(47.7)	(44.3)	(49.1)	(47.7)
Benefit Plan Liabilities [Member]
Beginning Balance	(263.1)	(264)	(245.3)	(246.3)	(264)	(246.3)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax	0.8	0.9	0.9	1
Ending Balance	(262.3)	(263.1)	(244.4)	(245.3)	(262.3)	(244.4)
Cash Flow Hedge - Interest Rate Swap [Member]
Beginning Balance	0.6	1	1.3	0.6	1	0.6
Cash flow hedge - interest rate swap, net of tax	(0.6)	(0.4)	0.2	0.7
Ending Balance		0.6	1.5	1.3		1.5
Non-controlling Interest [Member]
Beginning Balance	2.9	2.7	2.8	2.6	2.7	2.6
Net income	0.1	0.1	(0.1)	0.2
Foreign currency translation		0.1	0.1
Purchase of subsidiary shares from noncontrolling interest	2.9		(0.3)
Ending Balance	$ 5.9	$ 2.9	$ 2.5	2.8	$ 5.9	2.5
Unrealized Gain (Loss) on Equity Securities [Member]
Beginning Balance				1		$ 1
Unrealized Gain (Loss) on Equity Securities [Member] | ASU 2016-01 [Member]
Adoption of accounting principal				$ (1)

Stockholders' Equity (Deficit_4

Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in defined benefit pension and other post-retirement benefit plans, tax	$ 0.3	$ 0.3	$ 0.4	$ 0.3
Changes in interest rate swap, tax	$ 0.3	0.1	$ 0.1	0.2
ASC 842 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes due to adoption of ASC		$ 1.1
ASC 606 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes due to adoption of ASC				$ 0.7

Stockholders' Equity (Deficit_5

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, 2019USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	$ (315.8)
Accumulated other comprehensive income (loss) net of tax, ending balance	(311.4)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(52.8)
Other comprehensive income (loss) before reclassifications	3.5
Amounts reclassified from accumulated other comprehensive income into net income	0.2
Net current-period other comprehensive income (loss)	3.7
Accumulated other comprehensive income (loss) net of tax, ending balance	(49.1)
Benefit Plan Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(264)
Amounts reclassified from accumulated other comprehensive income into net income	1.7
Net current-period other comprehensive income (loss)	1.7
Accumulated other comprehensive income (loss) net of tax, ending balance	(262.3)
Cash Flow Hedge - Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	1
Other comprehensive income (loss) before reclassifications	(0.5)
Amounts reclassified from accumulated other comprehensive income into net income	(0.5)
Net current-period other comprehensive income (loss)	$ (1)

Stockholders' Equity (Deficit_6

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items, Actuarial Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	$ 1.9	$ 2.1	$ 3.8	$ 4.1
Foreign Currency Translation [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	0.2		0.2
Net of tax	0.2		0.2
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)	(0.8)	(1.5)	(1.5)
Cash Flow Hedge - Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net of tax			0.5
Realized swap interest loss	(0.3)	(0.1)	(0.6)	(0.1)
Tax provision			0.1
Net of tax	(0.3)	(0.1)	(0.5)	(0.1)
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	1.1	1.3	2.3	2.6
Tax provision (benefit)	(0.3)	(0.4)	(0.6)	(0.7)
Net of tax	$ 0.8	$ 0.9	$ 1.7	$ 1.9

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)Segment	Dec. 31, 2018USD ($)
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Number of operating segments	1
Number of reportable segments	1
Payment terms on invoiced amounts	30 days
Accounts receivables from contracts with customers | $	$ 555.9	$ 523.5
Minimum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Percentage of revenue from product sales	75.00%

Revenue Recognition - Percentag

Revenue Recognition - Percentage of Sales by Major Product Lines (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
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	25.00%	28.00%	25.00%	27.00%
Carbon Steel Plate [Member]
Product Line
Percentage of sales by major product lines	11.00%	11.00%	12.00%	11.00%
Carbon Steel Long [Member]
Product Line
Percentage of sales by major product lines	16.00%	12.00%	16.00%	12.00%
Stainless Steel Flat [Member]
Product Line
Percentage of sales by major product lines	15.00%	17.00%	15.00%	17.00%
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%	16.00%	15.00%	16.00%
Aluminum Plate [Member]
Product Line
Percentage of sales by major product lines	2.00%	3.00%	2.00%	3.00%
Aluminum Long [Member]
Product Line
Percentage of sales by major product lines	5.00%	4.00%	5.00%	4.00%
Other [Member]
Product Line
Percentage of sales by major product lines	2.00%	1.00%	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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Net sales	$ 1,204.9	$ 1,057.1	$ 2,435.7	$ 1,998.4
United States [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,095.4	938.7	2,215.8	1,774
Foreign Countries [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 109.5	$ 118.4	$ 219.9	$ 224.4

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Revenues by Type of Item Sold (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total	100.00%	100.00%	100.00%	100.00%
Revenue Recognized Point In Time
Disaggregation Of Revenue [Line Items]
Revenue on products with an alternative use	88.00%	88.00%	88.00%	89.00%
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Revenue on products with no alternative use	12.00%	12.00%	12.00%	11.00%

Revenue Recognition - Summary_3

Revenue Recognition - Summary of Significant Changes in Contract Assets and Contract Liabilities Balances (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Changes in the Contract Assets
Beginning Balance	$ 16.6
Net contract assets added for products with no alternative during the period	0.3
Changes to reserves	(0.7)
Ending Balance	16.2
Changes in the Contract Liabilities
Beginning Balance	10
Satisfied contract liability from beginning of the period	(4.5)
Contract liability incurred during the period	4.1
Changes to reserves	0.3
Ending Balance	$ 9.9

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information 1 (Detail)	Jun. 30, 2019
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations on contracts have expected duration	1 year

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax [Line Items]
Provision for income taxes	$ 5.5	$ 6.2	$ 18.5	$ 10.3
Valuation allowance	29.3		29.3		$ 29.3
GILTI [Member]
Income Tax [Line Items]
Provision for income taxes	$ (0.3)		$ 2.8

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income attributable to Ryerson Holding Corporation	$ 16.4	$ 17.5	$ 45.9	$ 27.9
Denominator:
Weighted average shares outstanding	37,769,001	37,294,982	37,610,108	37,252,020
Dilutive effect of stock-based awards	149,338	330,769	270,176	333,151
Weighted average shares outstanding adjusted for dilutive securities	37,918,339	37,625,751	37,880,284	37,585,171
Earnings per share
Basic	$ 0.43	$ 0.47	$ 1.22	$ 0.75
Diluted	$ 0.43	$ 0.46	$ 1.21	$ 0.74