Ryerson Holding (RYI) 10-Q 3 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 29, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
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		38,394,162
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	001-34735
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1251524
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	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	292-5000
Title of 12(b) Security	Common Stock, $0.01 par value, 100,000,000 shares authorized
Trading Symbol	RYI
Security Exchange Name	NYSE

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net sales	$ 1,575.1	$ 831.5	$ 4,141.4	$ 2,613.6
Cost of materials sold	1,210.5	675.6	3,321.9	2,146.4
Gross profit	364.6	155.9	819.5	467.2
Warehousing, delivery, selling, general, and administrative	180.2	125.4	530.3	405.2
Gain on sale of assets			(107.7)
Restructuring and other charges		0.2		2.2
Operating profit	184.4	30.3	396.9	59.8
Other income and (expense), net	(0.8)	0.5	(1.2)	0.4
Pension settlement charge due to annuitization	(98.3)	(52.5)	(98.3)	(52.5)
Loss on retirement of debt	(5.5)	(17.1)	(5.5)	(16.2)
Interest and other expense on debt	(13.7)	(20.2)	(40.8)	(61.2)
Income (loss) before income taxes	66.1	(59)	251.1	(69.7)
Provision (benefit) for income taxes	16.1	(19.3)	62.2	(20.9)
Net income (loss)	50	(39.7)	188.9	(48.8)
Less: Net income attributable to noncontrolling interest	0.3	0.2	1	0.3
Net income (loss) attributable to Ryerson Holding Corporation	49.7	(39.9)	187.9	(49.1)
Comprehensive income (loss)	137.6	(32.4)	282.9	(48.1)
Less: Comprehensive income attributable to noncontrolling interest	0.2	0.2	0.9	0.2
Comprehensive income (loss) attributable to Ryerson Holding Corporation	$ 137.4	$ (32.6)	$ 282	$ (48.3)
Basic earnings (loss) per share	$ 1.29	$ (1.05)	$ 4.90	$ (1.29)
Diluted earnings (loss) per share	1.27	$ (1.05)	4.84	$ (1.29)
Dividends declared per share	$ 0.08		$ 0.08

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net income (loss)	$ 188.9	$ (48.8)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	40.5	40.5
Stock-based compensation	4.3	1.4
Deferred income taxes	8.9	(10.9)
Provision for allowances, claims, and doubtful accounts	3.8	(1.1)
Restructuring and other charges		2.2
Gain on sale of assets	(107.7)
Pension settlement charge	98.8	54.3
Loss on retirement of debt	5.5	16.2
Non-cash (gain) loss from derivatives	37.7	(5)
Change in operating assets and liabilities:
Receivables	(322)	28.4
Inventories	(252)	169
Other assets and liabilities	(31.2)	13.5
Accounts payable	233.6	55.8
Accrued liabilities	31.3	(8.5)
Accrued taxes payable/receivable	12.7	(1.6)
Deferred employee benefit costs	(24.9)	(8.7)
Net adjustments	(260.7)	345.5
Net cash provided by (used in) operating activities	(71.8)	296.7
Investing activities:
Acquisitions, net of cash acquired	(14.5)
Capital expenditures	(25)	(17.9)
Proceeds from sale of property, plant, and equipment	166	0.1
Net cash provided by (used in) investing activities	126.5	(17.8)
Financing activities:
Long term debt issued		500
Repayment of debt	(156.9)	(602.8)
Net proceeds (repayments) of short-term borrowings	79.3	(73.5)
Bond issuance costs		(10.6)
Net increase (decrease) in book overdrafts	13.7	(16.2)
Principal payments on finance lease obligations	(7.5)	(9.9)
Dividends paid to shareholders	(3.1)
Share repurchases	(0.9)
Dividends paid to non-controlling interest		(0.2)
Net cash used in financing activities	(75.4)	(213.2)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(20.7)	65.7
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(0.8)	(2.6)
Net change in cash, cash equivalents, and restricted cash	(21.5)	63.1
Cash, cash equivalents, and restricted cash—beginning of period	62.5	59.8
Cash, cash equivalents, and restricted cash—end of period	41	122.9
Cash paid during the period for:
Interest paid to third parties, net	47.9	57.8
Income taxes, net	42.7	(7.1)
Noncash investing activities:
Asset additions under operating leases	115.4	0.9
Asset additions under finance leases and sale-leasebacks	$ 13.9	$ 1.4

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 39.9	$ 61.4
Restricted cash	1.1	1.1
Receivables less provisions of $2.9 at September 30, 2021 and $1.7 at December 31, 2020	699.7	378.9
Inventories	855.8	604.5
Prepaid expenses and other current assets	98	57.5
Total current assets	1,694.5	1,103.4
Property, plant, and equipment, at cost	765.8	822.9
Less: Accumulated depreciation	399.6	401.1
Property, plant, and equipment, net	366.2	421.8
Operating lease assets	204.7	108.3
Other intangible assets	43.9	43.2
Goodwill	124.4	120.3
Deferred charges and other assets	6.3	5.1
Total assets	2,440	1,802.1
Current liabilities:
Accounts payable	612.4	365.1
Salaries, wages, and commissions	84.8	43.1
Other accrued liabilities	135.5	78.3
Short-term debt	28.5	13.8
Current portion of operating lease liabilities	25.4	20.7
Current portion of deferred employee benefits	6.6	6.6
Total current liabilities	893.2	527.6
Long-term debt	644.1	726.2
Deferred employee benefits	178.6	231.6
Noncurrent operating lease liabilities	176.6	93
Deferred income taxes	99.7	58.2
Other noncurrent liabilities	19.5	20.4
Total liabilities	2,011.7	1,657
Commitments and contingencies
Ryerson Holding Corporation stockholders’ equity:
Preferred stock, $0.01 par value; 7,000,000 shares authorized; no shares issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.01 par value; 100,000,000 shares authorized; 38,687,094 and 38,329,897 shares issued at September 30, 2021 and December 31, 2020, respectively	0.4	0.4
Capital in excess of par value	387.4	383.1
Retained earnings	218.6	33.8
Treasury stock at cost – Common stock, value	(7.5)	(6.6)
Accumulated other comprehensive loss	(177.8)	(271.9)
Total Ryerson Holding Corporation stockholders’ equity	421.1	138.8
Noncontrolling interest	7.2	6.3
Total equity	428.3	145.1
Total liabilities and equity	$ 2,440	$ 1,802.1

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Receivables, provisions	$ 2.9	$ 1.7
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	7,000,000	7,000,000
Preferred Stock Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	38,687,094	38,329,897
Treasury stock at cost - Common stock, shares	251,427	212,500

Financial Statements

Financial Statements	9 Months Ended
	Sep. 30, 2021
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 55% of our outstanding common stock. We are a leading value-added processor and distributor of industrial metals with operations in the United States (“U.S.”) 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 processing and distribution operations in China through an indirect wholly-owned subsidiary, Ryerson China Limited (“Ryerson China”), a Chinese limited liability company. 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 future periods or for the year. The condensed consolidated financial statements as of September 30, 2021 and for the three-month and nine-month periods ended September 30, 2021 and 2020 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 U.S. generally accepted accounting principles (“GAAP”). 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, 2020.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
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 December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “ Income Taxes – Simplifying the Accounting for Income Taxes. Impact of Recently Issued Accounting Standards—Not Yet Adopted In October 2021, the FASB issued ASU 2021-08, “ Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. Revenue from Contracts with Customers

Cash, Cash Equivalents, and Res

Cash, Cash Equivalents, and Restricted Cash	9 Months Ended
	Sep. 30, 2021
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: September 30, December 31, 2021 2020 (In millions) Cash and cash equivalents $ 39.9 $ 61.4 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 41.0 $ 62.5 We had cash restricted for the purposes of covering letters of credit that can be presented for potential insurance claims.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 and December 31, 2020 as follows: September 30, December 31, 2021 2020 (In millions) In process and finished products $ 855.8 $ 604.5 If current cost had been used to value inventories, such inventories would have been $228 million higher The Company has consignment inventory at certain customer locations, which totaled $7.8 million and $4.8 million at September 30, 2021 and December 31, 2020, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	NOTE 5: PROPERTY, PLANT, AND EQUIPMENT During the first nine months of 2021, the Company completed several asset sales in the form of sale-leasebacks, to generate cash proceeds that were, in part, utilized to redeem a portion of the 8.50% senior secured notes due 2028 (the “2028 Notes”), and also in a continued effort to optimize our facility footprint. Each of these sale-leasebacks were for varying periods of time, ranging from 21 months to 15 years, and therefore the Company recorded right of use assets of $95.1 million and lease liabilities of $86.4 million. See Note 6: Leases for further discussion of the individually significant leaseback transaction. As a result of these transactions, $65.4 million of land and building assets, net of accumulated depreciation, were sold for net cash proceeds of $163.2 million, resulting in a total gain of $107.7 million. The Company also had normal course asset sale activity during the first nine months of 2021 which generated additional cash proceeds of $2.8 million.

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	NOTE 6: 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 2036 and finance leases expiring at various times through 2027. In June 2021, we completed a sale-leaseback transaction for a group of service center properties located in Delaware, Florida, Kentucky, Minnesota, Missouri, Oklahoma, Pennsylvania, Tennessee, Texas, and Virginia for net proceeds of approximately $104 million. The total annual rent for these properties starts at approximately $6.4 million per year, with the amount increasing by 1.5% annually over the 15-year lease term, including, without limitation, during any renewal term. Each lease includes two renewal options of five years each. Under the terms of the lease agreement, the Company is responsible for all taxes, insurance, and utilities and is required to adequately maintain the properties for the lease term. The transaction met the requirements for sale - leaseback accounting under ASC 842 and ASC 606. Accordingly, the Company recognized the sale of the properties, which resulted in a gain of approximately $ 62.5 million recorded in the Condensed Consolidated Statements of Comprehensive Income. The related land and buildings were removed from property, plant, and equipment and operating lease assets and liabilities of $ 84.4 million were recorded in the Condensed Consolidated Balance Sheets. The following table summarizes the location and amount of lease assets and lease liabilities reported in our Condensed Consolidated Balance Sheet as of September 30, 2021 and December 31, 2020: September 30, December 31, Leases Balance Sheet Location 2021 2020 (In millions) Assets Operating lease assets Operating lease assets $ 204.7 $ 108.3 Finance lease assets Property, plant, and equipment, net (a) 42.2 45.5 Total lease assets $ 246.9 $ 153.8 Liabilities Current Operating Current portion of operating lease liabilities $ 25.4 $ 20.7 Finance Other accrued liabilities 13.2 9.0 Noncurrent Operating Noncurrent operating lease liabilities 176.6 93.0 Finance Other noncurrent liabilities 16.5 14.3 Total lease liabilities $ 231.7 $ 137.0 (a) Finance lease assets were recorded net of accumulated amortization of $16.6 million and $21.0 million as of September 30, 2021 and December 31, 2020, respectively. The following table summarizes the location and amount of lease expense reported in our Condensed Consolidated Statements of Comprehensive Income for the three and nine month periods ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, Lease Expense Location of Lease Expense Recognized in Income 2021 2020 2021 2020 (In millions) Operating lease expense Warehousing, delivery, selling, general, and administrative $ 8.8 $ 6.1 $ 21.6 $ 18.0 Finance lease expense Amortization of lease assets Warehousing, delivery, selling, general, and administrative 1.3 2.2 4.1 5.6 Interest on lease liabilities Interest and other expense on debt 0.2 0.3 0.7 1.0 Variable lease expense Warehousing, delivery, selling, general, and administrative 0.7 0.7 2.1 2.3 Short-term lease expense Warehousing, delivery, selling, general, and administrative 0.7 0.5 2.0 1.8 Total lease expense $ 11.7 $ 9.8 $ 30.5 $ 28.7 The following table presents maturity analysis of lease liabilities at September 30, 2021: Maturity of Lease Liabilities Operating Leases (a) Finance Leases (In millions) 2021 $ 8.2 $ 3.0 2022 30.7 12.7 2023 26.9 6.1 2024 24.6 5.2 2025 20.8 2.7 After 2025 127.6 1.6 Total lease payments 238.8 31.3 Less: Interest (b) (36.8 ) (1.6 ) Present value of lease liabilities (c) $ 202.0 $ 29.7 (a) There were no operating leases with options to extend lease terms that are reasonably certain of being exercised, and the lease payments excluded an estimated amount of $64.2 million of legally binding lease payments for leases signed but not yet commenced. (b) Calculated using the discount rate for each lease. (c) Includes the current portion of $25.4 million for operating leases and $13.2 million for finance leases. The following table shows the weighted-average remaining lease term and discount rate for operating and finance leases, respectively, at September 30, 2021 and December 31, 2020: September 30, December 31, Lease Term and Discount Rate 2021 2020 Weighted-average remaining lease term (years) Operating leases 10.4 7.3 Finance leases 2.9 2.8 Weighted-average discount rate Operating leases 3.2 % 3.4 % Finance leases 3.5 % 4.4 % Information reported in our Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2021 and 2020 is summarized below: Nine Months Ended September 30, Other Information 2021 2020 (In millions) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 21.5 $ 18.9 Operating cash flows from finance leases 0.7 1.0 Financing cash flows from finance leases 7.5 9.9 Assets obtained in exchange for lease obligations Operating leases 115.4 0.9 Finance leases 13.9 1.4

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 7: GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill, which represents the excess of cost over the fair value of net assets acquired, amounted to $124.4 million and $120.3 million Intangibles – Goodwill and Other, Other intangible assets with finite useful lives continue to be amortized over their useful lives. During the first nine months of 2021, we recognized $5.7 million in intangibles. See Note 8: Acquisitions for further information. 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	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Acquisitions	NOTE 8: ACQUISITIONS On September 1, 2021, JT Ryerson acquired Specialty Metals Processing (“SMP”), . SMP processes stainless steel, aluminum, titanium, and nickel alloy products in a variety of industries including aerospace. SMP's expertise in buffing, grinding, and polishing finishes adds to Ryerson's value-added processing capabilities.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 9: LONG-TERM DEBT Long-term debt consisted of the following: September 30, December 31, 2021 2020 (In millions) Ryerson Credit Facility $ 349.7 $ 285.0 8.50% Senior Secured Notes due 2028 300.0 450.0 Foreign debt 26.7 12.1 Other debt 6.4 7.8 Unamortized debt issuance costs and discounts (10.2 ) (14.9 ) Total debt 672.6 740.0 Less: Short-term foreign debt 26.7 12.1 Less: Other short-term debt 1.8 1.7 Total long-term debt $ 644.1 $ 726.2 Ryerson Credit Facility On November 5, 2020, Ryerson entered into a fourth amendment of its $1.0 billion revolving credit facility to extend the maturity date from November 16, 2021 to November 5, 2025 (as amended, the “Ryerson Credit Facility” or “Credit Facility”). This fourth amendment also added the ability to convert up to $100 million of commitments under the Ryerson Credit Facility into a “first-in, last-out” sub-facility (the “FILO Facility”). Subject to certain limitations, such conversion can be made from time to time (but no more than twice in the aggregate) prior to the date that is two years after November 5, 2020. At September 30, 2021 , Ryerson of outstanding of letters of credit issued, available under Amounts outstanding under the Ryerson Credit Facility bear interest at (i) a rate determined by reference to (A) the base rate (the highest of the Federal Funds Rate plus 0.50%, Bank of America, N.A.’s prime rate, and the one-month LIBOR rate plus 1.00%, however, in no event shall the base rate be less than 1.25%), or (B) a LIBOR rate (with a floor of 0.25%) or, (ii) for Ryerson Holding’s Canadian subsidiary that is a borrower, (A) a rate determined by reference to the Canadian base rate (the greatest of the Federal Funds Rate plus 0.50%, Bank of America-Canada Branch’s “base rate” for commercial loans in U.S. Dollars made at its “base rate”, and the 30 day LIBOR rate plus 1.00%), (B) the prime rate (the greater of Bank of America-Canada Branch’s “prime rate” for commercial loans made by it in Canada in Canadian Dollars and the one-month Canadian bankers’ acceptance rate (with a floor of 0.25%) plus 1.00%, or (C) the bankers’ acceptance rate, however, in no event shall the Canadian base rate or the Canadian prime rate be less than 1.25%). Until November 5, 2021 the spread over the base rate and prime rate is fixed at 0.50% and the spread over the LIBOR for the bankers’ acceptances is fixed at 1.50%. After November 5, 2021, the spread over the base rate and prime rate will be between 0.25% and 0.50% and the spread over the LIBOR for the bankers’ acceptances will be between 1.25% and 1.50%, depending on the amount available to be borrowed under the Ryerson Credit Facility. The spread with respect to the FILO Facility, if any, will be determined at the time the commitments under the Ryerson Credit Facility are converted into such FILO Facility. Ryerson also pays commitment fees on amounts not borrowed at a rate of 0.225%. Overdue amounts and all amounts owed during the existence of a default bear interest at 2.00% above the rate otherwise applicable thereto. Loans advanced under the FILO Facility may only be prepaid if all then outstanding revolving loans are repaid in full. We attempt to minimize interest rate risk exposure through the utilization of interest rate swaps, which are derivative financial instruments. In June 2019, we entered into an 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. In November 2019, we entered into another interest rate swap to fix interest on $100 million of our floating rate debt under the Ryerson Credit Facility at a rate of 1.539% through November 2022 2.9 Borrowings under the Ryerson The Ryerson Ryerson Ryerson The Ryerson Ryerson Ryerson The lenders under the Ryerson Ryerson Net repayments of short-term borrowings that are reflected in the Condensed Consolidated Statements of Cash Flows represent borrowings under the Ryerson 2022 and 2028 Notes On July 22, 2020, JT Ryerson issued $500 million in aggregate principal amount of its 2028 Notes. The 2028 Notes bear interest at a rate of 8.50% per annum. The 2028 Notes are fully and unconditionally guaranteed on a senior secured basis by all of our existing and future domestic subsidiaries that are co-borrowers or that have guarantee obligations under the Ryerson Credit Facility. The net proceeds from the issuance of the 2028 Notes, along with available cash, were used to (i) redeem all of the 11.0% Senior Secured Notes due 2022 (the “2022 Notes”) and (ii) pay related transaction fees, expenses, and premiums. During the fourth quarter of 2020, a principal amount of $50.0 million of the 2028 Notes was redeemed for $51.5 million and retired. During the third quarter of 2021, a principal amount of $150.0 million of the 2028 Notes was redeemed for $155.5 million and retired. As a result, $300 million in aggregate principal amount remained outstanding at September 30, 2021. The 2028 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 U.S. (other than receivables, inventory, cash deposit accounts and certain other assets, and proceeds thereof, which are secured pursuant to a second-priority security interest), subject to certain exceptions and customary permitted liens. The 2028 Notes will be redeemable, in whole or in part, at any time on or after August 1, 2023 at certain redemption prices. The redemption price for the 2028 Notes if redeemed during the twelve months beginning (i) August 1, 2023 is 104.250%, (ii) August 1, 2024 is 102.125%, and (iii) August 1, 2025 and thereafter is 100.000%. All redemption amounts also include accrued and unpaid interest, if any, to, but not including, the redemption date. JT Ryerson may also redeem some or all of the 2028 Notes before August 1, 2023 at a redemption price of 100.000% of the principal amount, plus accrued and unpaid interest, if any, to, but not including, the redemption date, plus a “make-whole” premium. In addition, JT Ryerson may redeem up to 40% of the outstanding 2028 Notes before August 1, 2023 with the net cash proceeds from certain equity offerings at a price equal to 108.500% of the principal amount of the Notes, plus accrued but unpaid interest, if any, to, but not including, the redemption date. Furthermore, JT Ryerson may redeem the 2028 Notes at any time and from time to time prior to August 1, 2023 in an aggregate principal amount equal to up to 10% of the original aggregate principal amount of the 2028 Notes during each twelve month period commencing on July 22, 2020 at a redemption price of 103.000%, plus accrued and unpaid interest, if any, to, but not including, the redemption date. JT Ryerson may also redeem the 2028 Notes at any time prior to August 1, 2022 in an aggregate principal amount equal to $100.0 million on a one-time basis from the net cash proceeds received from the sale of real property, at a redemption price of 104.000% plus accrued and unpaid interest, if any, to, but not including, the redemption date. In addition, JT Ryerson may be required to make an offer to purchase the 2028 Notes upon the sale of certain assets or upon a change of control. On July 9, 2021, JT Ryerson completed a partial redemption of $100 million of aggregate principal amount of the 2028 Notes at a redemption price in cash of 104.000% of the principal amount of the notes redeemed, plus accrued and unpaid interest to, but not including, the redemption date. JT Ryerson funded the partial redemption using the proceeds of a sale leaseback transaction that closed on June 9, 2021. See Note 6: Leases for further discussion of the sale leaseback transaction. Additionally, on July 23, 2021, JT Ryerson completed a partial redemption of $50 million aggregate principal amount of the 2028 Notes at a redemption price in cash of 103.000% of the principal amount of the notes redeemed, plus accrued and unpaid interest to, but not including, the redemption date. JT Ryerson funded this redemption with cash available on hand. The Company evaluated the redemption options within the 2028 Notes for embedded derivatives and determined that one redemption option required bifurcation as it is not clearly and closely related to the debt agreement. The Company determined the fair value of the embedded derivative as of December 31, 2020 was $2.3 million and recorded it within other current assets in the Condensed Consolidated Balance Sheet. As of September 30, 2021, the fair value was determined to be $0.4 million with the change of $1.9 million recognized within other income and (expense), net on the Condensed Consolidated Statements of Comprehensive Income. Refer to Note 11: Derivatives and Fair Value Measurements for further discussion of the embedded derivative. The 2028 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. During the first six months of 2020, a principal amount of $57.6 million of the 2022 Notes were repurchased for $56.7 million and retired, resulting in the recognition of a $0.9 million gain within other income and (expense), net on the Condensed Consolidated Statement of Comprehensive Income. Foreign Debt At September 30, 2021, Ryerson China’s foreign borrowings were $26.7 million, which were owed to banks in Asia at a weighted average interest rate of 3.6% per annum and secured by inventory and property, plant, and equipment. At December 31, 2020, Ryerson China’s foreign borrowings were $12.1 million rate of 3.6% Availability under the foreign credit lines was $20 million and $35 million at September 30, 2021 and December 31, 2020, respectively. Letters of credit issued by our foreign subsidiaries were $5 million and $6 million at September 30, 2021 and December 31, 2020, respectively.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Employee Benefits	NOTE 10: EMPLOYEE BENEFITS The following tables summarize the components of net periodic benefit cost (credit) for the Ryerson pension plans and postretirement benefit plans other than pension: Three Months Ended September 30, Pension Benefits Other Benefits 2021 2020 2021 2020 (In millions) Components of net periodic benefit cost (credit) Service cost $ 0.8 $ 0.8 $ 0.2 $ 0.1 Interest cost 2.9 5.1 0.3 0.4 Expected return on assets (5.8 ) (8.2 ) — — Settlement charge 98.4 53.2 — — Recognized actuarial (gain) loss 3.9 4.2 (1.5 ) (1.7 ) Amortization of prior service cost (credit) — 0.1 (0.2 ) (0.5 ) Net periodic benefit cost (credit) $ 100.2 $ 55.2 $ (1.2 ) $ (1.7 ) Nine Months Ended September 30, Pension Benefits Other Benefits 2021 2020 2021 2020 (In millions) Components of net periodic benefit cost (credit) Service cost $ 2.6 $ 2.5 $ 0.4 $ 0.4 Interest cost 8.8 15.4 0.9 1.3 Expected return on assets (17.6 ) (24.4 ) — — Settlement expense 98.8 54.3 — — Recognized actuarial (gain) loss 11.7 12.6 (4.5 ) (5.2 ) Amortization of prior service cost (credit) — 0.1 (0.4 ) (1.6 ) Net periodic benefit cost (credit) $ 104.3 $ 60.5 $ (3.6 ) $ (5.1 ) 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. Effective September 24, 2021, the Ryerson Pension Plan purchased $206.6 million of annuities on behalf of a portion of plan participants which, due to the size of the transaction, resulted in settlement accounting. The pension plan was remeasured as of September 30, 2021. The remeasurement resulted in a settlement loss of $98.3 million which was recorded within Other income and (expense), net in the Condensed Consolidated Statement of Comprehensive Income as of September 30, 2021. As a result of the remeasurement, the discount rate increased from 2.42% to 2.80% and the expected long-term rate of return on pension assets decreased from 5.05% to 4.35%. Effective September 28, 2020, the Ryerson Pension Plan purchased $95.2 million of annuities on behalf of a portion of plan participants which, due to the size of the transaction, resulted in settlement accounting. The pension plan was remeasured as of September 30, 2020. The remeasurement resulted in a settlement loss of $52.5 million which was recorded within Other income and (expense), net in the Condensed Consolidated Statement of Comprehensive Income as of September 30, 2020. As a result of the remeasurement, the discount rate decreased from 3.15% to 2.59% and the expected long-term rate of return on pension assets decreased from 5.75% to 5.25%. The Company contributed $24 million to the pension plan funds through the nine months ended September 30, 2021, and anticipates no additional pension contribution funding for the remaining three months of 2021 as a result of recent pension funding relief measures under the American Rescue Plan Act (“ARPA”) passed in March 2021.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 11: COMMITMENTS AND CONTINGENCIES In October 2011, the United States Environmental Protection Agency (the “EPA”) named JT Ryerson as one of more than 100 businesses that may be a potentially responsible party (“PRP”) 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. At a December 4, 2018 meeting with the Portland Harbor Participation and Common Interest Group (“PCI Group”), of which JT Ryerson is a member, the EPA indicated that it expected PRPs to submit a plan during 2019 to start remediation of the river and harbor per the ROD within the next two to three years. The EPA also indicated that it expected allocation of amounts among the parties to be determined in the same two to three-year The EPA met with various PRPs throughout 2019 and 2020 regarding remedial design. The EPA did not include JT Ryerson in those meetings. It did include Schnitzer Steel, which is developing a remedial design plan for the river area which includes the area where the former JT Ryerson facilities were located. Schnitzer Steel’s 2020 disclosures acknowledged that Schnitzer Steel is the legal successor to the prior operators (including JT Ryerson) in the designated area. On February 12, 2021, the EPA announced that one hundred percent (100%) of the PHS Site is now in the active remedial design phase. In June 2021, the EPA issued a Fact Sheet setting forth the status of the entire site. The primary area of relevance for JT Ryerson is River Mile 3.5 East, with Swan Island Basin being of secondary interest. For River Mile 3.5, remedial design work is ongoing; the Sufficiency Assessment and the Pre-Design Investigation work plans are finalized, and design investigation sampling is underway. Schnitzer Steel and MMGL Corp. are the working parties for River Mile 3.5. For Swan Island, remedial design is just beginning, with Daimler Trucks, Shipyard Commerce, and various government entities as the working parties. JT Ryerson has not been asked to participate in the remedial design phase. The PCI Group has engaged a third party to prepare cost estimates for each of the Sediment Management Areas at the site. That work is still in progress and is expected to be completed in early 2022. Once the cost estimates are completed, the voting parties of the PCI Group (which does not include JT Ryerson) will likely begin the “advocacy process,” during which the voting parties submit written arguments to the Allocation Team regarding how costs should be allocated among the various PRPs. This process is anticipated to be completed sometime in 2022. Once the advocacy process is completed, the Allocation Team will prepare a proposed allocation of costs among the PRPs. All PRPs, including JT R yerson , will then participate in the “mediation process,” during which the PRPs will attempt to agree on a final cost allocation. The mediation process is currently anticipated to occur sometime in 2022 or 2023. The EPA has stated that it is willing to consider de minimis settlements, which JT Ryerson is trying to pursue; however, the EPA has not begun meeting with any of the smaller parties who have requested de minimis or de micromis status, stating that it does not have sufficient information to determine whether any parties meet such criteria and does not intend to begin those considerations until after the remedial design work is completed. It has met with selected parties that we believe to be larger targets. JT Ryerson has not been invited to meet with the EPA. As a result of the ongoing negotiations and filings over the ROD and the EPA’s decision not to meet with smaller parties, we cannot determine how allocations will be made and whether a de minimus settlement can be reached with the EPA. As 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 September 30, 2021 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	9 Months Ended
	Sep. 30, 2021
Investments All Other Investments [Abstract]
Derivatives and Fair Value Measurements	NOTE 12: DERIVATIVES AND FAIR VALUE MEASUREMENTS Derivatives The Company may use derivatives to partially offset its business exposure to commodity price, foreign currency, and interest rate fluctuations and their related impact on expected future cash flows and certain existing assets and liabilities. However, the Company may choose not to hedge certain exposures for a variety of reasons including, but not limited to, Company policy, accounting considerations, or the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in commodity pricing, foreign currency exchange, or interest rates. 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 in our Canada, Mexico, and China operations 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 fixed price natural gas contracts and diesel fuel derivative contracts 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 June 2019, we entered into a forward agreement for $60 million of “pay fixed” interest at 1.729% through June 2022 and in November 2019, we entered into a forward agreement for $100 million of “pay fixed” interest at 1.539% through November 2022. Upon entering into the swaps, the interest rate reset dates and critical terms matched the terms of our existing debt and anticipated critical terms of future debt under the third amendment of the Ryerson Credit Facility 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 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. In connection with the redemption options under the 2028 Notes, the Company recorded an embedded derivative in other current assets on its Condensed Consolidated Balance Sheet, with changes in value recorded within other income and (expense), net within the Condensed Consolidated Statement of Comprehensive Income, see Note 8: Long-term debt, for further details. Embedded derivatives are separated from the host contract and carried at fair value when: (a) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract ; (b) the instrument is not measured at fair value under other applicable GAAP standards, and ( c ) a separate, stand-alone instrument with the same terms would qualify as a derivative instrument. The Company has concluded that the embedded derivative within the 2028 Notes met these criteria and, as such, must be valued separate and apart from the 2028 Notes at fair value each reporting period. The following table summarizes the location and fair value amount of our derivative instruments reported in our Condensed Consolidated Balance Sheets as of September 30, 2021 and December 31, 2020: Asset Derivatives Liability Derivatives Balance Sheet Location September 30, 2021 December 31, 2020 Balance Sheet Location September 30, 2021 December 31, 2020 Derivatives not designated as hedging instruments under ASC 815 (In millions) Metal commodity contracts Prepaid expenses and other current assets $ 26.2 $ 16.0 Other accrued liabilities $ 58.2 $ 11.9 2028 Notes embedded derivative Prepaid expenses and other current assets 0.4 2.3 Other accrued liabilities — — Foreign exchange contracts Prepaid expenses and other current assets — — Other accrued liabilities — 0.2 Interest rate swaps – current Deferred charges and other assets — — Other accrued liabilities 0.7 — Interest rate swaps – non-current Deferred charges and other assets — — Other noncurrent liabilities 1.6 4.0 Total derivatives $ 26.6 $ 18.3 $ 60.5 $ 16.1 The following table presents the volume of the Company’s activity in derivative instruments as of September 30, 2021 and December 31, 2020: Notional Amount Derivative Instruments At September 30, 2021 At December 31, 2020 Unit of Measurement Hot roll coil swap contracts 155,080 125,220 Tons Aluminum swap contracts 18,800 20,264 Tons Nickel swap contracts 750 345 Tons Foreign currency exchange contracts 1.0 million 7.4 million U.S. dollars Interest rate swap contracts 160 million 160 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 nine months ended September 30, 2021 and 2020: 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 September 30, Nine Months Ended September 30, under ASC 815 on Derivatives 2021 2020 2021 2020 (In millions) Metal commodity contracts Cost of materials sold $ (3.8 ) $ 2.0 $ (43.9 ) $ 1.3 2028 Notes embedded derivative Other income and (expense), net (0.9 ) — (1.9 ) — Foreign exchange contracts Other income and (expense), net — (0.1 ) 0.2 — Interest rate swaps (subsequent to de-designation) Interest and other expense on debt (0.1 ) — (0.1 ) — Total $ (4.8 ) $ 1.9 $ (45.7 ) $ 1.3 Amount of Gain/(Loss) Reclassified from Accumulated Other Comprehensive Income into Income Interest rate swaps (subsequent to de-designation) Interest and other expense on debt $ (0.5 ) $ — $ (1.6 ) $ — 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 nine months ended September 30, 2021 and 2020: 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 September 30, Nine Months Ended September 30, under ASC 815 on Derivatives 2021 2020 2021 2020 (In millions) Interest rate swaps (prior to de-designation) Interest and other expense on debt $ — $ (0.5 ) $ — $ (1.1 ) As of September 30, 2021, the portion of the interest rate swap fair value that would be reclassified into earnings during the next 12 months as interest expense is approximately $2.0 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 September 30, 2021: At September 30, 2021 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 26.2 $ — 2028 Notes embedded derivative — — 0.4 Total derivatives $ — $ 26.2 $ 0.4 Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 58.2 $ — Interest rate swaps — 2.3 — Total derivatives $ — $ 60.5 $ — 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, 2020: At December 31, 2020 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 16.0 $ — 2028 Notes embedded derivative — — 2.3 Total derivatives $ — $ 16.0 $ 2.3 Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 11.9 $ — Foreign exchange contracts — 0.2 — Interest rate swaps — 4.0 — Total derivatives $ — $ 16.1 $ — The fair value of each commodity, diesel fuel, and swap 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 hot roll coil, nickel, and aluminum prices for varying time periods. The fair value of hot roll coil, nickel, 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 the London Metals Exchange (nickel and aluminum), 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 1 to 12 months in length. The fair value of our interest rate swap is based on the sum of all future net present value cash flows for the fixed and floating leg of the swap. The future cash flows are derived based on the terms of our interest rate swap, as well as published discount factors, and projected forward LIBOR rates. The fair value of the embedded derivative is determined using Level 3 inputs based on the Black-Derman-Toy lattice model and the “with-and-without” approach. This method estimates the value of the 2028 Notes both with and without the embedded derivative. The value of the embedded derivative is the difference between the two methods. The value of the 2028 Notes with the embedded derivative is based on recent trading prices of the 2028 Notes (Level 1 inputs). Determining the value of the 2028 Notes without the embedded derivative requires significant judgements made by management such as the probability of redemption linked transactions occurring, the cash flows expected to be generated from these transactions, as well as the timing of these transactions (Level 3 inputs). The changes in financial instruments measured at fair value for which the Company has used Level 3 inputs to determine fair value are as follows: 2028 Notes Embedded Derivative (In millions) Balance at January 1, 2021 $ 2.3 Unrealized loss recorded in other income and (expense), net (1.9 ) Balance at September 30, 2021 $ 0.4 The carrying and estimated fair values of our financial instruments at September 30, 2021 and December 31, 2020 were as follows: At September 30, 2021 At December 31, 2020 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 39.9 $ 39.9 $ 61.4 $ 61.4 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provisions 699.7 699.7 378.9 378.9 Accounts payable 612.4 612.4 365.1 365.1 Long-term debt, including current portion 672.6 706.6 740.0 800.3 The estimated fair value of the Company’s cash and cash equivalents, restricted cash, 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, Accumulat

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	NOTE 13: STOCKHOLDERS’ EQUITY, ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), AND NONCONTROLLING INTEREST The following table details changes in Ryerson Holding Corporation Stockholders’ Equity accounts for the three and nine month periods ended September 30, 2021: Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Retained Earnings Foreign Currency Translation Benefit Plan Liabilities 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, 2021 38,330 $ 0.4 213 $ (6.6 ) $ 383.1 $ 33.8 $ (47.0 ) $ (221.8 ) $ (3.1 ) $ 6.3 $ 145.1 Net income — — — — — 25.3 — — — 0.3 25.6 Foreign currency translation — — — — — — 0.1 — — (0.1 ) — Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.5 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense — — — — 1.6 — — — — — 1.6 Interest rate swap, net of tax of $0.1 — — — — — — — — 0.4 — 0.4 Balance at March 31, 2021 38,330 $ 0.4 213 $ (6.6 ) $ 384.7 $ 59.1 $ (46.9 ) $ (219.8 ) $ (2.7 ) $ 6.5 $ 174.7 Net income — — — — — 112.9 — — — 0.4 113.3 Foreign currency translation — — — — — — 1.5 — — 0.1 1.6 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.6 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense 357 — — — 1.5 — — — — — 1.5 Interest rate swap, net of tax of $0.2 — — — — — — — — 0.4 — 0.4 Balance at June 30, 2021 38,687 $ 0.4 213 $ (6.6 ) $ 386.2 $ 172.0 $ (45.4 ) $ (217.8 ) $ (2.3 ) $ 7.0 $ 293.5 Net income — — — — — 49.7 — — — 0.3 50.0 Foreign currency translation — — — — — — (3.4 ) — — (0.1 ) (3.5 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $31.1 — — — — — — — 90.7 — — 90.7 Share repurchases — — 38 (0.9 ) — — — — — — (0.9 ) Stock-based compensation expense — — — — 1.2 — — — — — 1.2 Cash dividends - $0.08 per share — — — — — (3.1 ) — — — — (3.1 ) Interest rate swap, net of tax of $0.1 — — — — — — — — 0.4 — 0.4 Balance at September 30, 2021 38,687 $ 0.4 251 $ (7.5 ) $ 387.4 $ 218.6 $ (48.8 ) $ (127.1 ) $ (1.9 ) $ 7.2 $ 428.3 The following table details changes in Ryerson Holding Corporation Stockholders’ Equity accounts for the three and nine month periods ended September 30, 2020: 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, 2020 37,996 $ 0.4 213 $ (6.6 ) $ 381.2 $ 99.6 $ (48.6 ) $ (253.1 ) $ (0.3 ) $ 6.0 $ 178.6 Net income — — — — — 16.4 — — — — 16.4 Foreign currency translation — — — — — — (8.5 ) — — — (8.5 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.6 — — — — — — — 1.8 — — 1.8 Stock-based compensation expense — — — — 0.6 — — — — — 0.6 Cash flow hedge - interest rate swap, net of tax of $1.2 — — — — — — — — (3.5 ) — (3.5 ) Balance at March 31, 2020 37,996 $ 0.4 213 $ (6.6 ) $ 381.8 $ 116.0 $ (57.1 ) $ (251.3 ) $ (3.8 ) $ 6.0 $ 185.4 Net income (loss) — — — — — (25.6 ) — — — 0.1 (25.5 ) Foreign currency translation — — — — — — 1.7 — — (0.1 ) 1.6 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.7 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense 334 — — — 0.4 — — — — — 0.4 Dividends paid to noncontrolling interest — — — — — — — — — (0.2 ) (0.2 ) Balance at June 30, 2020 38,330 $ 0.4 213 $ (6.6 ) $ 382.2 $ 90.4 $ (55.4 ) $ (249.3 ) $ (3.8 ) $ 5.8 $ 163.7 Net income (loss) — — — — — (39.9 ) — — — 0.2 (39.7 ) Foreign currency translation — — — — — — 1.2 — — — 1.2 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $2.0 — — — — — — — 5.8 — — 5.8 Stock-based compensation expense — — — — 0.4 — — — — — 0.4 Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — 0.3 — 0.3 Balance at September 30, 2020 38,330 $ 0.4 213 $ (6.6 ) $ 382.6 $ 50.5 $ (54.2 ) $ (243.5 ) $ (3.5 ) $ 6.0 $ 131.7 The following table details changes in accumulated other comprehensive income (loss), net of tax, for the nine months ended September 30, 2021: Changes in Accumulated Other Comprehensive Income (Loss) by Component, net of tax Foreign Currency Translation Benefit Plan Liabilities Interest Rate Swap (In millions) Balance at January 1, 2021 $ (47.0 ) $ (221.8 ) $ (3.1 ) Other comprehensive income before reclassifications (1.8 ) 13.1 — Amounts reclassified from accumulated other comprehensive income into net income — 81.6 1.2 Net current-period other comprehensive income (1.8 ) 94.7 1.2 Balance at September 30, 2021 $ (48.8 ) $ (127.1 ) $ (1.9 ) The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and nine month periods ended September 30, 2021: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Affected line item in the Condensed Details about Accumulated Other September 30, 2021 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Amortization of defined benefit pension and other post-retirement benefit plan items Actuarial loss $ 2.4 $ 7.3 Other income and (expense), net Pension settlement 98.4 98.8 Other income and (expense), net Prior service credits (0.1 ) (0.3 ) Other income and (expense), net Total before tax 100.7 105.8 Tax benefit (23.1 ) (24.2 ) Net of tax $ 77.6 $ 81.6 Interest rate swap Realized swap interest (subsequent to de-designation) $ 0.5 $ 1.6 Interest and other expense on debt Tax benefit (0.1 ) (0.4 ) Net of tax $ 0.4 $ 1.2 The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and nine month periods ended September 30, 2020: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Affected line item in the Condensed Details about Accumulated Other September 30, 2020 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Amortization of defined benefit pension and other post-retirement benefit plan items Actuarial loss $ 2.5 $ 7.5 Other income and (expense), net Pension settlement 53.2 54.3 Other income and (expense), net Prior service credits (0.5 ) (1.5 ) Other income and (expense), net Total before tax 55.2 60.3 Tax benefit (14.3 ) (15.6 ) Net of tax $ 40.9 $ 44.7 Cash flow hedge - interest rate swap Realized swap interest (prior to de-designation) $ 0.5 $ 1.1 Interest and other expense on debt Tax benefit (0.1 ) (0.3 ) Net of tax $ 0.4 $ 0.8

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2021
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 14: REVENUE RECOGNITION We are a leading value-added processor and distributor 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 bending, beveling, blanking, blasting, burning, cutting-to-length, drilling, embossing, flattening, forming, grinding, laser cutting, machining, notching, painting, perforating, polishing, punching, rolling, sawing, scribing, shearing, slitting, stamping, tapping, threading, welding, or other techniques to process materials to a specified thickness, length, width, shape, and surface quality pursuant to specific customer orders. 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 Nine Months Ended September 30, September 30, Product Line 2021 2020 2021 2020 Carbon Steel Flat 31 % 28 % 31 % 26 % Carbon Steel Plate 10 8 10 9 Carbon Steel Long 13 13 13 15 Stainless Steel Flat 19 16 18 16 Stainless Steel Plate 5 4 4 5 Stainless Steel Long 4 5 4 5 Aluminum Flat 11 16 13 14 Aluminum Plate 2 3 2 3 Aluminum Long 4 5 4 5 Other 1 2 1 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 September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net Sales (In millions) United States 1,431.3 $ 737.9 $ 3,733.8 $ 2,337.7 Foreign countries 143.8 93.6 $ 407.6 275.9 Total $ 1,575.1 $ 831.5 $ 4,141.4 $ 2,613.6 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 September 30, Nine Months Ended September 30, Timing of Revenue Recognition 2021 2020 2021 2020 Revenue on products with an alternative use 90 % 89 % 90 % 88 % Revenue on products with no alternative use 10 11 10 12 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 $702.6 million and $380.6 million as of September 30, 2021 and December 31, 2020, respectively. Contract assets, which consist primarily of revenues recognized over time that have not yet been invoiced and estimates of the value of inventory that will be received in conjunction with product returns changes in the contract assets and the contract liabilities balances during the period are as follows: Contract Assets Contract Liabilities (In millions) Beginning Balance at January 1, 2021 $ 10.8 $ 10.8 Contract liability satisfied during the period — (9.7 ) Contract liability incurred during the period — 10.9 Net change in contract assets and liabilities for products with no alternative use during the period 6.9 0.1 Changes to reserves 0.4 1.7 Ending Balance at September 30, 2021 $ 18.1 $ 13.8 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.

Provision for Credit Losses

Provision for Credit Losses	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Provision for Credit Losses	NOTE 15: PROVISION FOR CREDIT LOSSES Provisions for allowances and claims on accounts receivables and contract assets are based upon historical rates, expected trends, and estimates of potential returns, allowances, customer discounts, and incentives. The Company considers all available information when assessing the adequacy of the provision for allowances, claims, and doubtful accounts. The Company performs ongoing credit evaluations of customers and sets credit limits based upon review of the customers’ current credit information, payment history, and the current economic and industry environments. The Company’s credit loss reserve consists of two parts: a) a provision for estimated credit losses based on historical experience and b) a reserve for specific customer collection issues that the Company has identified. Estimation of credit losses requires adjusting historical loss experience for current economic conditions and judgments about the probable effects of economic conditions on certain customers. The following table provides a reconciliation of the provision for credit losses reported within the Condensed Consolidated Balance Sheets as of September 30, 2021: Changes in Provision for Expected Credit Losses (In millions) Balance at January 1, 2021 $ 1.7 Current period provision 1.8 Write-offs charged against allowance (0.7 ) Recoveries 0.2 Foreign currency translation (0.1 ) Balance at September 30, 2021 $ 2.9

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 16: INCOME TAXES For the three months ended September 30, 2021, the Company recorded income tax expense of 16.1 As required by ASC 740, the Company assesses the realizability of its deferred tax assets. The Company records a valuation allowance when, based upon the evaluation of all available evidence, it is more-likely-than-not that all or a portion of the deferred tax assets will not be realized. In making 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 $ million at September 30, 2021 and $ 6.6 million at December 31, 2020 . 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. For the three-month and nine-month periods ended September 30, 2021, we have included a tax expense of $0.4 million and $0.7 million, respectively, related to GILTI as part of our tax provision. The Company accounts for uncertain income tax positions in accordance with ASC 740. In the second quarter of 2021, we released $0.7 million of reserves bringing the unrecognized tax benefits balance from $1.7 million at December 31, 2020 to $1.0 million at September 30, 2021.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	NOTE 17: EARNINGS (LOSS) PER SHARE Basic earnings (loss) per share attributable to Ryerson Holding’s common stock is determined based on earnings (loss) for the period divided by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) 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 weighted average number of shares excluded as they would have had an antidilutive effect were 44,909 and 42,262 for the three and nine-month periods ended September 30, 2021 and 250,356 and 259,244 for the three and nine-month periods ended September 30, 2020, respectively. The following table sets forth the calculation of basic and diluted earnings (loss) per share: Three Months Ended September 30, Nine Months Ended September 30, Basic and diluted earnings (loss) per share 2021 2020 2021 2020 (In millions, except number of shares which are reflected in thousands and per share data) Numerator: Net income (loss) attributable to Ryerson Holding Corporation $ 49.7 $ (39.9 ) $ 187.9 $ (49.1 ) Denominator: Weighted average shares outstanding 38,470 38,117 38,350 37,994 Dilutive effect of stock-based awards 621 — 472 — Weighted average shares outstanding adjusted for dilutive securities 39,091 38,117 38,822 37,994 Earnings (loss) per share Basic $ 1.29 $ (1.05 ) $ 4.90 $ (1.29 ) Diluted $ 1.27 $ (1.05 ) $ 4.84 $ (1.29 )

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	NOTE 18: SUBSEQUENT EVENTS On October 4, 2021, the Company entered into a lease to rent approximately 897,000 square feet of space to be constructed by the lessor in University Park, Illinois (the “Premises”). The lease is for a 184-month term, to commence upon substantial completion of construction of the Premises which date is anticipated to be May 1, 2023. We have the option to extend the lease for four additional five-year terms, on substantially the same terms and conditions as the prior term, but with the base rent rate adjusted to fair market value at that time. The Company is responsible for paying its share of building and common area expenses. The initial base rent is approximately $7.3 million on an annualized basis, subject to annual increases of approximately 2.25%. The operating lease assets and liabilities are estimated to be $100 million and will be recognized at the commencement date of the lease. On November 3, 2021, the Board of Directors declared a quarterly cash dividend in the amount of $0.085 per share of common stock, payable on December 16, 2021 to stockholders of record as of November 15, 2021. Future quarterly dividends, if any, will be subject to Board approval.

Summary of Accounting and Finan

Summary of Accounting and Financial Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Impact of Recently Issued Accounting Standards—Adopted In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “ Income Taxes – Simplifying the Accounting for Income Taxes. Impact of Recently Issued Accounting Standards—Not Yet Adopted In October 2021, the FASB issued ASU 2021-08, “ Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. Revenue from Contracts with Customers

Cash, Cash Equivalents, and R_2

Cash, Cash Equivalents, and Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2021
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: September 30, December 31, 2021 2020 (In millions) Cash and cash equivalents $ 39.9 $ 61.4 Restricted cash 1.1 1.1 Total cash, cash equivalents, and restricted cash $ 41.0 $ 62.5

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2021
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories, at stated LIFO value, were classified at September 30, 2021 and December 31, 2020 as follows: September 30, December 31, 2021 2020 (In millions) In process and finished products $ 855.8 $ 604.5

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 and December 31, 2020: September 30, December 31, Leases Balance Sheet Location 2021 2020 (In millions) Assets Operating lease assets Operating lease assets $ 204.7 $ 108.3 Finance lease assets Property, plant, and equipment, net (a) 42.2 45.5 Total lease assets $ 246.9 $ 153.8 Liabilities Current Operating Current portion of operating lease liabilities $ 25.4 $ 20.7 Finance Other accrued liabilities 13.2 9.0 Noncurrent Operating Noncurrent operating lease liabilities 176.6 93.0 Finance Other noncurrent liabilities 16.5 14.3 Total lease liabilities $ 231.7 $ 137.0 (a) Finance lease assets were recorded net of accumulated amortization of $16.6 million and $21.0 million as of September 30, 2021 and December 31, 2020, respectively.
Summary of Location and Amount of Lease Expense	The following table summarizes the location and amount of lease expense reported in our Condensed Consolidated Statements of Comprehensive Income for the three and nine month periods ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, Lease Expense Location of Lease Expense Recognized in Income 2021 2020 2021 2020 (In millions) Operating lease expense Warehousing, delivery, selling, general, and administrative $ 8.8 $ 6.1 $ 21.6 $ 18.0 Finance lease expense Amortization of lease assets Warehousing, delivery, selling, general, and administrative 1.3 2.2 4.1 5.6 Interest on lease liabilities Interest and other expense on debt 0.2 0.3 0.7 1.0 Variable lease expense Warehousing, delivery, selling, general, and administrative 0.7 0.7 2.1 2.3 Short-term lease expense Warehousing, delivery, selling, general, and administrative 0.7 0.5 2.0 1.8 Total lease expense $ 11.7 $ 9.8 $ 30.5 $ 28.7
Schedule of Maturity Analysis of Lease Liabilities	The following table presents maturity analysis of lease liabilities at September 30, 2021: Maturity of Lease Liabilities Operating Leases (a) Finance Leases (In millions) 2021 $ 8.2 $ 3.0 2022 30.7 12.7 2023 26.9 6.1 2024 24.6 5.2 2025 20.8 2.7 After 2025 127.6 1.6 Total lease payments 238.8 31.3 Less: Interest (b) (36.8 ) (1.6 ) Present value of lease liabilities (c) $ 202.0 $ 29.7 (a) There were no operating leases with options to extend lease terms that are reasonably certain of being exercised, and the lease payments excluded an estimated amount of $64.2 million of legally binding lease payments for leases signed but not yet commenced. (b) Calculated using the discount rate for each lease. (c) Includes the current portion of $25.4 million for operating leases and $13.2 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 September 30, 2021 and December 31, 2020: September 30, December 31, Lease Term and Discount Rate 2021 2020 Weighted-average remaining lease term (years) Operating leases 10.4 7.3 Finance leases 2.9 2.8 Weighted-average discount rate Operating leases 3.2 % 3.4 % Finance leases 3.5 % 4.4 %
Schedule of Information Reported in Condensed Consolidated Statement of Cash Flows	Information reported in our Condensed Consolidated Statement of Cash Flows for the nine months ended September 30, 2021 and 2020 is summarized below: Nine Months Ended September 30, Other Information 2021 2020 (In millions) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 21.5 $ 18.9 Operating cash flows from finance leases 0.7 1.0 Financing cash flows from finance leases 7.5 9.9 Assets obtained in exchange for lease obligations Operating leases 115.4 0.9 Finance leases 13.9 1.4

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	Long-term debt consisted of the following: September 30, December 31, 2021 2020 (In millions) Ryerson Credit Facility $ 349.7 $ 285.0 8.50% Senior Secured Notes due 2028 300.0 450.0 Foreign debt 26.7 12.1 Other debt 6.4 7.8 Unamortized debt issuance costs and discounts (10.2 ) (14.9 ) Total debt 672.6 740.0 Less: Short-term foreign debt 26.7 12.1 Less: Other short-term debt 1.8 1.7 Total long-term debt $ 644.1 $ 726.2

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Benefit Cost (Credit)	The following tables summarize the components of net periodic benefit cost (credit) for the Ryerson pension plans and postretirement benefit plans other than pension: Three Months Ended September 30, Pension Benefits Other Benefits 2021 2020 2021 2020 (In millions) Components of net periodic benefit cost (credit) Service cost $ 0.8 $ 0.8 $ 0.2 $ 0.1 Interest cost 2.9 5.1 0.3 0.4 Expected return on assets (5.8 ) (8.2 ) — — Settlement charge 98.4 53.2 — — Recognized actuarial (gain) loss 3.9 4.2 (1.5 ) (1.7 ) Amortization of prior service cost (credit) — 0.1 (0.2 ) (0.5 ) Net periodic benefit cost (credit) $ 100.2 $ 55.2 $ (1.2 ) $ (1.7 ) Nine Months Ended September 30, Pension Benefits Other Benefits 2021 2020 2021 2020 (In millions) Components of net periodic benefit cost (credit) Service cost $ 2.6 $ 2.5 $ 0.4 $ 0.4 Interest cost 8.8 15.4 0.9 1.3 Expected return on assets (17.6 ) (24.4 ) — — Settlement expense 98.8 54.3 — — Recognized actuarial (gain) loss 11.7 12.6 (4.5 ) (5.2 ) Amortization of prior service cost (credit) — 0.1 (0.4 ) (1.6 ) Net periodic benefit cost (credit) $ 104.3 $ 60.5 $ (3.6 ) $ (5.1 )

Derivatives and Fair Value Me_2

Derivatives and Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 and December 31, 2020: Asset Derivatives Liability Derivatives Balance Sheet Location September 30, 2021 December 31, 2020 Balance Sheet Location September 30, 2021 December 31, 2020 Derivatives not designated as hedging instruments under ASC 815 (In millions) Metal commodity contracts Prepaid expenses and other current assets $ 26.2 $ 16.0 Other accrued liabilities $ 58.2 $ 11.9 2028 Notes embedded derivative Prepaid expenses and other current assets 0.4 2.3 Other accrued liabilities — — Foreign exchange contracts Prepaid expenses and other current assets — — Other accrued liabilities — 0.2 Interest rate swaps – current Deferred charges and other assets — — Other accrued liabilities 0.7 — Interest rate swaps – non-current Deferred charges and other assets — — Other noncurrent liabilities 1.6 4.0 Total derivatives $ 26.6 $ 18.3 $ 60.5 $ 16.1
Volume of Company 's Activity in Derivative Instruments	The following table presents the volume of the Company’s activity in derivative instruments as of September 30, 2021 and December 31, 2020: Notional Amount Derivative Instruments At September 30, 2021 At December 31, 2020 Unit of Measurement Hot roll coil swap contracts 155,080 125,220 Tons Aluminum swap contracts 18,800 20,264 Tons Nickel swap contracts 750 345 Tons Foreign currency exchange contracts 1.0 million 7.4 million U.S. dollars Interest rate swap contracts 160 million 160 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 nine months ended September 30, 2021 and 2020: 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 September 30, Nine Months Ended September 30, under ASC 815 on Derivatives 2021 2020 2021 2020 (In millions) Metal commodity contracts Cost of materials sold $ (3.8 ) $ 2.0 $ (43.9 ) $ 1.3 2028 Notes embedded derivative Other income and (expense), net (0.9 ) — (1.9 ) — Foreign exchange contracts Other income and (expense), net — (0.1 ) 0.2 — Interest rate swaps (subsequent to de-designation) Interest and other expense on debt (0.1 ) — (0.1 ) — Total $ (4.8 ) $ 1.9 $ (45.7 ) $ 1.3 Amount of Gain/(Loss) Reclassified from Accumulated Other Comprehensive Income into Income Interest rate swaps (subsequent to de-designation) Interest and other expense on debt $ (0.5 ) $ — $ (1.6 ) $ —
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 nine months ended September 30, 2021 and 2020: 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 September 30, Nine Months Ended September 30, under ASC 815 on Derivatives 2021 2020 2021 2020 (In millions) Interest rate swaps (prior to de-designation) Interest and other expense on debt $ — $ (0.5 ) $ — $ (1.1 )
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 September 30, 2021: At September 30, 2021 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 26.2 $ — 2028 Notes embedded derivative — — 0.4 Total derivatives $ — $ 26.2 $ 0.4 Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 58.2 $ — Interest rate swaps — 2.3 — Total derivatives $ — $ 60.5 $ — 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, 2020: At December 31, 2020 Level 1 Level 2 Level 3 (In millions) Assets Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 16.0 $ — 2028 Notes embedded derivative — — 2.3 Total derivatives $ — $ 16.0 $ 2.3 Liabilities Derivatives: Derivatives not designated as hedging instruments under ASC 815: Metal commodity contracts $ — $ 11.9 $ — Foreign exchange contracts — 0.2 — Interest rate swaps — 4.0 — Total derivatives $ — $ 16.1 $ —
Financial Instruments Measured at Fair Value	The changes in financial instruments measured at fair value for which the Company has used Level 3 inputs to determine fair value are as follows: 2028 Notes Embedded Derivative (In millions) Balance at January 1, 2021 $ 2.3 Unrealized loss recorded in other income and (expense), net (1.9 ) Balance at September 30, 2021 $ 0.4
Carrying and Estimated Fair Values of Financial Instruments	The carrying and estimated fair values of our financial instruments at September 30, 2021 and December 31, 2020 were as follows: At September 30, 2021 At December 31, 2020 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Cash and cash equivalents $ 39.9 $ 39.9 $ 61.4 $ 61.4 Restricted cash 1.1 1.1 1.1 1.1 Receivables less provisions 699.7 699.7 378.9 378.9 Accounts payable 612.4 612.4 365.1 365.1 Long-term debt, including current portion 672.6 706.6 740.0 800.3

Stockholders' Equity, Accumul_2

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Change in Stockholders' Equity (Deficit), Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest	The following table details changes in Ryerson Holding Corporation Stockholders’ Equity accounts for the three and nine month periods ended September 30, 2021: Accumulated Other Comprehensive Income (Loss) Common Stock Treasury Stock Capital in Excess of Par Value Retained Earnings Foreign Currency Translation Benefit Plan Liabilities 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, 2021 38,330 $ 0.4 213 $ (6.6 ) $ 383.1 $ 33.8 $ (47.0 ) $ (221.8 ) $ (3.1 ) $ 6.3 $ 145.1 Net income — — — — — 25.3 — — — 0.3 25.6 Foreign currency translation — — — — — — 0.1 — — (0.1 ) — Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.5 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense — — — — 1.6 — — — — — 1.6 Interest rate swap, net of tax of $0.1 — — — — — — — — 0.4 — 0.4 Balance at March 31, 2021 38,330 $ 0.4 213 $ (6.6 ) $ 384.7 $ 59.1 $ (46.9 ) $ (219.8 ) $ (2.7 ) $ 6.5 $ 174.7 Net income — — — — — 112.9 — — — 0.4 113.3 Foreign currency translation — — — — — — 1.5 — — 0.1 1.6 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.6 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense 357 — — — 1.5 — — — — — 1.5 Interest rate swap, net of tax of $0.2 — — — — — — — — 0.4 — 0.4 Balance at June 30, 2021 38,687 $ 0.4 213 $ (6.6 ) $ 386.2 $ 172.0 $ (45.4 ) $ (217.8 ) $ (2.3 ) $ 7.0 $ 293.5 Net income — — — — — 49.7 — — — 0.3 50.0 Foreign currency translation — — — — — — (3.4 ) — — (0.1 ) (3.5 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $31.1 — — — — — — — 90.7 — — 90.7 Share repurchases — — 38 (0.9 ) — — — — — — (0.9 ) Stock-based compensation expense — — — — 1.2 — — — — — 1.2 Cash dividends - $0.08 per share — — — — — (3.1 ) — — — — (3.1 ) Interest rate swap, net of tax of $0.1 — — — — — — — — 0.4 — 0.4 Balance at September 30, 2021 38,687 $ 0.4 251 $ (7.5 ) $ 387.4 $ 218.6 $ (48.8 ) $ (127.1 ) $ (1.9 ) $ 7.2 $ 428.3 The following table details changes in Ryerson Holding Corporation Stockholders’ Equity accounts for the three and nine month periods ended September 30, 2020: 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, 2020 37,996 $ 0.4 213 $ (6.6 ) $ 381.2 $ 99.6 $ (48.6 ) $ (253.1 ) $ (0.3 ) $ 6.0 $ 178.6 Net income — — — — — 16.4 — — — — 16.4 Foreign currency translation — — — — — — (8.5 ) — — — (8.5 ) Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.6 — — — — — — — 1.8 — — 1.8 Stock-based compensation expense — — — — 0.6 — — — — — 0.6 Cash flow hedge - interest rate swap, net of tax of $1.2 — — — — — — — — (3.5 ) — (3.5 ) Balance at March 31, 2020 37,996 $ 0.4 213 $ (6.6 ) $ 381.8 $ 116.0 $ (57.1 ) $ (251.3 ) $ (3.8 ) $ 6.0 $ 185.4 Net income (loss) — — — — — (25.6 ) — — — 0.1 (25.5 ) Foreign currency translation — — — — — — 1.7 — — (0.1 ) 1.6 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $0.7 — — — — — — — 2.0 — — 2.0 Stock-based compensation expense 334 — — — 0.4 — — — — — 0.4 Dividends paid to noncontrolling interest — — — — — — — — — (0.2 ) (0.2 ) Balance at June 30, 2020 38,330 $ 0.4 213 $ (6.6 ) $ 382.2 $ 90.4 $ (55.4 ) $ (249.3 ) $ (3.8 ) $ 5.8 $ 163.7 Net income (loss) — — — — — (39.9 ) — — — 0.2 (39.7 ) Foreign currency translation — — — — — — 1.2 — — — 1.2 Changes in defined benefit pension and other post-retirement benefit plans, net of tax of $2.0 — — — — — — — 5.8 — — 5.8 Stock-based compensation expense — — — — 0.4 — — — — — 0.4 Cash flow hedge - interest rate swap, net of tax of $0.1 — — — — — — — — 0.3 — 0.3 Balance at September 30, 2020 38,330 $ 0.4 213 $ (6.6 ) $ 382.6 $ 50.5 $ (54.2 ) $ (243.5 ) $ (3.5 ) $ 6.0 $ 131.7
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 nine months ended September 30, 2021: Changes in Accumulated Other Comprehensive Income (Loss) by Component, net of tax Foreign Currency Translation Benefit Plan Liabilities Interest Rate Swap (In millions) Balance at January 1, 2021 $ (47.0 ) $ (221.8 ) $ (3.1 ) Other comprehensive income before reclassifications (1.8 ) 13.1 — Amounts reclassified from accumulated other comprehensive income into net income — 81.6 1.2 Net current-period other comprehensive income (1.8 ) 94.7 1.2 Balance at September 30, 2021 $ (48.8 ) $ (127.1 ) $ (1.9 )
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 nine month periods ended September 30, 2021: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Affected line item in the Condensed Details about Accumulated Other September 30, 2021 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Amortization of defined benefit pension and other post-retirement benefit plan items Actuarial loss $ 2.4 $ 7.3 Other income and (expense), net Pension settlement 98.4 98.8 Other income and (expense), net Prior service credits (0.1 ) (0.3 ) Other income and (expense), net Total before tax 100.7 105.8 Tax benefit (23.1 ) (24.2 ) Net of tax $ 77.6 $ 81.6 Interest rate swap Realized swap interest (subsequent to de-designation) $ 0.5 $ 1.6 Interest and other expense on debt Tax benefit (0.1 ) (0.4 ) Net of tax $ 0.4 $ 1.2 The following table details the reclassifications out of accumulated other comprehensive income (loss) for the three and nine month periods ended September 30, 2020: Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Affected line item in the Condensed Details about Accumulated Other September 30, 2020 Consolidated Statements of Comprehensive Income (Loss) Components (In millions) Comprehensive Income Amortization of defined benefit pension and other post-retirement benefit plan items Actuarial loss $ 2.5 $ 7.5 Other income and (expense), net Pension settlement 53.2 54.3 Other income and (expense), net Prior service credits (0.5 ) (1.5 ) Other income and (expense), net Total before tax 55.2 60.3 Tax benefit (14.3 ) (15.6 ) Net of tax $ 40.9 $ 44.7 Cash flow hedge - interest rate swap Realized swap interest (prior to de-designation) $ 0.5 $ 1.1 Interest and other expense on debt Tax benefit (0.1 ) (0.3 ) Net of tax $ 0.4 $ 0.8

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2021
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 Nine Months Ended September 30, September 30, Product Line 2021 2020 2021 2020 Carbon Steel Flat 31 % 28 % 31 % 26 % Carbon Steel Plate 10 8 10 9 Carbon Steel Long 13 13 13 15 Stainless Steel Flat 19 16 18 16 Stainless Steel Plate 5 4 4 5 Stainless Steel Long 4 5 4 5 Aluminum Flat 11 16 13 14 Aluminum Plate 2 3 2 3 Aluminum Long 4 5 4 5 Other 1 2 1 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 September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net Sales (In millions) United States 1,431.3 $ 737.9 $ 3,733.8 $ 2,337.7 Foreign countries 143.8 93.6 $ 407.6 275.9 Total $ 1,575.1 $ 831.5 $ 4,141.4 $ 2,613.6 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 September 30, Nine Months Ended September 30, Timing of Revenue Recognition 2021 2020 2021 2020 Revenue on products with an alternative use 90 % 89 % 90 % 88 % Revenue on products with no alternative use 10 11 10 12 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, 2021 $ 10.8 $ 10.8 Contract liability satisfied during the period — (9.7 ) Contract liability incurred during the period — 10.9 Net change in contract assets and liabilities for products with no alternative use during the period 6.9 0.1 Changes to reserves 0.4 1.7 Ending Balance at September 30, 2021 $ 18.1 $ 13.8

Provision for Credit Losses (Ta

Provision for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Schedule of Reconciliation of Provision for Credit Losses	The following table provides a reconciliation of the provision for credit losses reported within the Condensed Consolidated Balance Sheets as of September 30, 2021: Changes in Provision for Expected Credit Losses (In millions) Balance at January 1, 2021 $ 1.7 Current period provision 1.8 Write-offs charged against allowance (0.7 ) Recoveries 0.2 Foreign currency translation (0.1 ) Balance at September 30, 2021 $ 2.9

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Earnings (Loss) Per Share	The following table sets forth the calculation of basic and diluted earnings (loss) per share: Three Months Ended September 30, Nine Months Ended September 30, Basic and diluted earnings (loss) per share 2021 2020 2021 2020 (In millions, except number of shares which are reflected in thousands and per share data) Numerator: Net income (loss) attributable to Ryerson Holding Corporation $ 49.7 $ (39.9 ) $ 187.9 $ (49.1 ) Denominator: Weighted average shares outstanding 38,470 38,117 38,350 37,994 Dilutive effect of stock-based awards 621 — 472 — Weighted average shares outstanding adjusted for dilutive securities 39,091 38,117 38,822 37,994 Earnings (loss) per share Basic $ 1.29 $ (1.05 ) $ 4.90 $ (1.29 ) Diluted $ 1.27 $ (1.05 ) $ 4.84 $ (1.29 )

Financial Statements - Addition

Financial Statements - Additional Information (Detail)	Sep. 30, 2021shares
Accounting Policies [Abstract]
Parent company shares owned by affiliates	21,037,500
Parent company percentage owned by affiliates	55.00%

Cash, Cash Equivalents, and R_3

Cash, Cash Equivalents, and Restricted Cash - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 39.9	$ 61.4
Restricted cash	1.1	1.1
Total cash, cash equivalents, and restricted cash	$ 41	$ 62.5

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
In process and finished products	$ 855.8	$ 604.5

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventory LIFO reserve	$ 228	$ (63)
Inventories accounted under the LIFO method	89.00%	91.00%
Consignment inventory	$ 7.8	$ 4.8

Property, Plant and Equipment -

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Right of use assets		$ 204.7	$ 108.3
Lease liabilities	[1],[2]	202
Gain from sale leaseback transaction		107.7
Additional cash proceeds from the sale of assets		2.8
Land and Building [Member]
Property Plant And Equipment [Line Items]
Land and building assets, net of accumulated depreciation		65.4
Sale leaseback Transaction, net cash proceeds		163.2
Gain from sale leaseback transaction		$ 107.7
Senior Secured Notes due 2028 [Member]
Property Plant And Equipment [Line Items]
Debt instrument interest rate stated percentage		8.50%
Sale Lease Back Transaction [Member]
Property Plant And Equipment [Line Items]
Right of use assets		$ 95.1
Lease liabilities		$ 86.4
Minimum [Member]
Property Plant And Equipment [Line Items]
Sale leaseback transaction, lease terms		21 months
Maximum [Member]
Property Plant And Equipment [Line Items]
Sale leaseback transaction, lease terms		15 years
[1]	Includes the current portion of $25.4 million for operating leases and $13.2 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 lease payments excluded an estimated amount of $64.2 million of legally binding lease payments for leases signed but not yet commenced.

Leases - Additional Information

Leases - Additional Information (Detail) $ in Millions		9 Months Ended
		Sep. 30, 2021USD ($)Lease	Dec. 31, 2020USD ($)
Lessee Lease Description [Line Items]
Gain from sale leaseback transaction		$ 107.7
Right of use assets		204.7	$ 108.3
Lease liabilities	[1],[2]	202
Significant Sale Lease Back Transaction [Member]
Lessee Lease Description [Line Items]
Net Proceeds From Sale Leaseback Transaction		$ 104
Percentage Increase of Amount		1.50%
Sale And Leased Back Annual Rent Payments Next Twelve Months		$ 6.4
Sale Leaseback Transaction Lease Term		15 years
Sale Leaseback Transaction Number Of Renewal Options | Lease		2
Sale leaseback transaction, renewal term		5 years
Gain from sale leaseback transaction		$ 62.5
Right of use assets		84.4
Lease liabilities		$ 84.4
Maximum [Member]
Lessee Lease Description [Line Items]
Noncancelable operating leases expire period		2036
Finance leases expire period		2027
[1]	Includes the current portion of $25.4 million for operating leases and $13.2 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 lease payments excluded an estimated amount of $64.2 million of legally binding lease payments for leases signed but not yet commenced.

Leases - Summary of Location an

Leases - Summary of Location and Amount of Lease Assets and Lease Liabilities (Detail) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Assets
Right of use assets		$ 204.7	$ 108.3
Finance lease assets	[1]	42.2	45.5
Total lease assets		246.9	153.8
Liabilities
Operating lease liabilities, current		25.4	20.7
Finance lease liabilities, current		13.2	9
Operating lease liabilities, noncurrent		176.6	93
Finance lease liabilities, noncurrent		$ 16.5	$ 14.3
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]		Other noncurrent liabilities	Other noncurrent liabilities
Total lease liabilities		$ 231.7	$ 137
[1]	Finance lease assets were recorded net of accumulated amortization of $16.6 million and $21.0 million as of September 30, 2021 and December 31, 2020, respectively.

Leases - Summary of Location _2

Leases - Summary of Location and Amount of Lease Assets and Lease Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Accumulated amortization	$ 399.6	$ 401.1
Finance Lease [Member]
Lessee Lease Description [Line Items]
Accumulated amortization	$ 16.6	$ 21

Leases - Summary of Location _3

Leases - Summary of Location and Amount of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease Expense
Total lease expense	$ 11.7	$ 9.8	$ 30.5	$ 28.7
Warehousing, Delivery, Selling, General, and Administrative [Member]
Lease Expense
Operating lease expense	8.8	6.1	21.6	18
Finance lease expense
Amortization of lease assets	1.3	2.2	4.1	5.6
Variable lease expense	0.7	0.7	2.1	2.3
Short-term lease expense	0.7	0.5	2	1.8
Interest and Other Expense on Debt [Member]
Finance lease expense
Interest on lease liabilities	$ 0.2	$ 0.3	$ 0.7	$ 1

Leases - Schedule of Maturity A

Leases - Schedule of Maturity Analysis of Lease Liabilities (Detail) $ in Millions	Sep. 30, 2021USD ($)
Operating Leases
2021	$ 8.2	[1]
2022	30.7	[1]
2023	26.9	[1]
2024	24.6	[1]
2025	20.8	[1]
After 2025	127.6	[1]
Total lease payments	238.8	[1]
Less: Interest	(36.8)	[1],[2]
Present value of lease liabilities	202	[1],[3]
Finance Leases
2021	3
2022	12.7
2023	6.1
2024	5.2
2025	2.7
After 2025	1.6
Total lease payments	31.3
Less: Interest	(1.6)	[2]
Present value of lease liabilities	$ 29.7	[3]
[1]	There were no operating leases with options to extend lease terms that are reasonably certain of being exercised, and the lease payments excluded an estimated amount of $64.2 million of legally binding lease payments for leases signed but not yet commenced.
[2]	Calculated using the discount rate for each lease.
[3]	Includes the current portion of $25.4 million for operating leases and $13.2 million for finance leases.

Leases - Schedule of Maturity_2

Leases - Schedule of Maturity Analysis of Lease Liabilities (Parenthetical) (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
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	64,200,000
Operating leases, current portion	25,400,000	$ 20,700,000
Finance leases, current portion	$ 13,200,000	$ 9,000,000

Leases - Schedule of Weighted-A

Leases - Schedule of Weighted-Average Remaining Lease Term and Discount Rate for Operating and Finance Leases (Detail)	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, Weighted-average remaining lease term	10 years 4 months 24 days	7 years 3 months 18 days
Finance leases, Weighted-average remaining lease term	2 years 10 months 24 days	2 years 9 months 18 days
Operating leases, Weighted-average discount rate	3.20%	3.40%
Finance leases, Weighted-average discount rate	3.50%	4.40%

Leases - Schedule of Informatio

Leases - Schedule of Information Reported in Condensed Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 21.5	$ 18.9
Operating cash flows from finance leases	0.7	1
Financing cash flows from finance leases	7.5	9.9
Assets obtained in exchange for lease obligations
Operating leases	115.4	0.9
Finance leases	$ 13.9	$ 1.4

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 124,400,000	$ 120,300,000
Additional goodwill during acquisitions	$ 4,100,000
Annual goodwill impairment test date	Oct. 1, 2020
Impairment charge	$ 0
Intangibles assets from acquisitions	$ 5,700,000

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - Specialty Metals Processing ("SMP") [Member]	Sep. 01, 2021
Business Acquisition [Line Items]
Effective date of acquisition	Sep. 1, 2021
Description of business acquisition	On September 1, 2021, JT Ryerson acquired Specialty Metals Processing (“SMP”), a toll processor located in Stow, Ohio. SMP processes stainless steel, aluminum, titanium, and nickel alloy products in a variety of industries including aerospace. SMP's expertise in buffing, grinding, and polishing finishes adds to Ryerson's value-added processing capabilities.

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Foreign debt	$ 26.7	$ 12.1
Other debt	6.4	7.8
Unamortized debt issuance costs and discounts	(10.2)	(14.9)
Total debt	672.6	740
Less: Other short-term debt	1.8	1.7
Total long-term debt	644.1	726.2
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Ryerson Credit Facility	349.7	285
2028 Notes [Member]
Debt Instrument [Line Items]
Senior secured notes	$ 300	$ 450

Long-Term Debt - Ryerson Credit

Long-Term Debt - Ryerson Credit Facility - Additional Information (Detail) - USD ($)	Nov. 05, 2020	Nov. 30, 2019	Jun. 30, 2019	Sep. 30, 2021	Dec. 31, 2020
Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity	$ 1,000,000,000
Outstanding borrowings				$ 349,700,000	$ 285,000,000
Letters of credit				12,000,000	11,000,000
Available credit facility				$ 638,000,000	$ 277,000,000
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 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. 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				0.225%
Ryerson Credit Facility [Member] | 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] | Second Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest rate swap agreement date		2019-11
Hedged debt amount		$ 100,000,000
Derivative fixed interest rate		1.539%
Derivative maturity period		2022-11
Ryerson Credit Facility [Member] | All Interest Rate Swap [Member]
Debt Instrument [Line Items]
Weighted average interest rate				2.60%	2.90%
Ryerson Credit Facility [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				0.50%
Ryerson Credit Facility [Member] | Base Rate
Debt Instrument [Line Items]
Fixed floor of the base rate				1.25%
Ryerson Credit Facility [Member] | Prime Rate and One Month LIBOR Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				1.00%
Ryerson Credit Facility [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Fixed floor of the LIBOR rate				0.25%
Ryerson Credit Facility [Member] | 30 Day LIBOR Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				1.00%
Ryerson Credit Facility [Member] | Canadian Subsidiaries [Member] | One Month Canadian Bankers Acceptance Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				1.00%
Ryerson Credit Facility [Member] | Canadian Subsidiaries [Member] | Banker's Acceptance Rate [Member]
Debt Instrument [Line Items]
Fixed floor of Canadian base rate or Canadian prime rate				1.25%
Ryerson Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit facility maturity date	Nov. 16, 2021
Ryerson Credit Facility [Member] | Minimum [Member] | Canadian Subsidiaries [Member] | Base Rate And Canadian Prime Rate
Debt Instrument [Line Items]
Fixed floor of Canadian base rate or Canadian prime rate				0.25%
Ryerson Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility maturity date	Nov. 5, 2025
First In Last Out Subfacility | Ryerson Credit Facility [Member]
Debt Instrument [Line Items]
Amount of borrow under FILO Facility	$ 100,000,000
After November 5, 2021 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Spread over base interest rate				0.50%
After November 5, 2021 [Member] | Ryerson Credit Facility [Member] | Minimum [Member] | Base Rate And Canadian Prime Rate
Debt Instrument [Line Items]
Spread over base interest rate				0.25%
After November 5, 2021 [Member] | Ryerson Credit Facility [Member] | Minimum [Member] | LIBOR and Banker's Acceptance Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				1.25%
After November 5, 2021 [Member] | Ryerson Credit Facility [Member] | Maximum [Member] | LIBOR and Banker's Acceptance Rate [Member]
Debt Instrument [Line Items]
Spread over base interest rate				1.50%
Until November 5, 2021 [Member] | Ryerson Credit Facility [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Spread over base interest rate				1.50%
Until November 5, 2021 [Member] | Ryerson Credit Facility [Member] | Minimum [Member] | Base Rate And Canadian Prime Rate
Debt Instrument [Line Items]
Spread over base interest rate				0.50%

Long-Term Debt - 2028 Notes - A

Long-Term Debt - 2028 Notes - Additional Information (Detail) - USD ($) $ in Millions	Jul. 23, 2021	Jul. 09, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jul. 22, 2020
Debt Instrument [Line Items]
Loss on retirement of debt			$ (5.5)		$ (17.1)		$ (5.5)	$ (16.2)
2028 Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			300	$ 300			300		$ 500
Debt instrument interest rate stated percentage									8.50%
Principal amount of debt instrument repurchased			150	50			150
Cash outflow to retire debt			155.5	51.5
Redemption price as a percentage of principal amount	103.00%	104.00%
Embedded derivative, face amount			$ 0.4	$ 2.3			0.4
Change in embedded derivative, face amount							$ 1.9
Principal Amount For Partial Redemption	$ 50	$ 100
2028 Notes [Member] | Redeemable in twelve months beginning August 1, 2023 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							104.25%
2028 Notes [Member] | Redeemable in twelve months beginning August 1, 2024 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							102.125%
2028 Notes [Member] | Redeemable in twelve months beginning August 1, 2025 and thereafter [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							100.00%
2028 Notes [Member] | Redeemable before August 1, 2023 Including Make Whole Premium [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							100.00%
2028 Notes [Member] | Redeemable before August 1, 2023 with the net cash proceeds from certain equity offerings [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							108.50%
Percentage of principal amount debt can be redeemed							40.00%
2028 Notes [Member] | Redeemable each twelve months commencing on July 22, 2020 and prior to August 1, 2023 [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							103.00%
Percentage of principal amount debt can be redeemed							10.00%
2028 Notes [Member] | Redeemable one time prior to August 1, 2022 from the net cash proceeds received from the sale of real property [Member]
Debt Instrument [Line Items]
Redemption price as a percentage of principal amount							104.00%
Principal Amount Debt Can Be Redeemed							$ 100
2022 Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage									11.00%
Principal amount of debt instrument repurchased						$ 57.6
Cash outflow to retire debt						56.7
2022 Notes [Member] | Other Income and (Expense), Net [Member]
Debt Instrument [Line Items]
Loss on retirement of debt						$ 0.9

Long-Term Debt - Foreign Debt -

Long-Term Debt - Foreign Debt - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Foreign debt	$ 26.7	$ 12.1
Foreign Debt [Member]
Debt Instrument [Line Items]
Available credit facility	20	35
Letters of credit issued by our foreign subsidiaries	5	6
Foreign Debt [Member] | Owed to Banks [Member] | Ryerson China [Member]
Debt Instrument [Line Items]
Foreign debt	$ 26.7	$ 12.1
Weighted average interest rate	6.00%	3.60%

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement charge			$ 98.8	$ 54.3
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.8	$ 0.8	2.6	2.5
Interest cost	2.9	5.1	8.8	15.4
Expected return on assets	(5.8)	(8.2)	(17.6)	(24.4)
Settlement charge	98.4	53.2	98.8	54.3
Recognized actuarial (gain) loss	3.9	4.2	11.7	12.6
Amortization of prior service cost (credit)		0.1		0.1
Net periodic benefit cost (credit)	100.2	55.2	104.3	60.5
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.2	0.1	0.4	0.4
Interest cost	0.3	0.4	0.9	1.3
Recognized actuarial (gain) loss	(1.5)	(1.7)	(4.5)	(5.2)
Amortization of prior service cost (credit)	(0.2)	(0.5)	(0.4)	(1.6)
Net periodic benefit cost (credit)	$ (1.2)	$ (1.7)	$ (3.6)	$ (5.1)

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 24, 2021	Sep. 30, 2020	Sep. 28, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Payment price for purchased annuities on behalf of participants		$ 206.6		$ 95.2
Pension settlement charge due to annuitization					$ 98.3	$ 52.5	$ 98.3	$ 52.5
Discount rate	2.80%		2.59%				2.42%	3.15%
Expected long-term rate of return on pension assets	4.35%		5.25%				5.05%	5.75%
Pension Benefits [Member] | American Rescue Plan Act
Defined Benefit Plan Disclosure [Line Items]
Contribution to the pension plan fund							$ 24
Anticipated minimum required pension contribution funding	$ 0				$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Jan. 02, 2020	Sep. 30, 2021
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
Remediation plan description		the EPA indicated that it expected PRPs to submit a plan during 2019 to start remediation of the river and harbor per the ROD within the next two to three years. The EPA also indicated that it expected allocation of amounts among the parties to be determined in the same two to three-year time frame.
Percentage of acreage on remediation	100.00%
Minimum [Member]
Loss Contingencies [Line Items]
Remediation plan due date		2 years
Remediation plan allocation of amount due date		2 years
Maximum [Member]
Loss Contingencies [Line Items]
Remediation plan due date		3 years
Remediation plan allocation of amount due date		3 years

Derivatives and Fair Value Me_3

Derivatives and Fair Value Measurements - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)DerivativeInstrument	Dec. 31, 2020USD ($)	Nov. 30, 2019USD ($)	Jun. 30, 2019USD ($)
Derivatives Fair Value [Line Items]
Fair value of interest rate swaps	$ 2,300,000
Minimum [Member]
Derivatives Fair Value [Line Items]
General term for commodity and exchange contracts	1 month
Maximum [Member]
Derivatives Fair Value [Line Items]
General term for commodity and exchange contracts	12 months
Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount	$ 160,000,000	$ 160,000,000
Derivative gain (loss) to be reclassified into interest income during next 12 months	$ 2,000,000
Ryerson Credit Facility [Member]
Derivatives Fair Value [Line Items]
Number of derivative instruments | DerivativeInstrument	2
Ryerson Credit Facility [Member] | Second Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount			$ 100,000,000
Derivative fixed interest rate			1.539%
Ryerson Credit Facility [Member] | Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount				$ 60,000,000
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	Sep. 30, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 26.6	$ 18.3
Liability Derivatives, Fair Value	60.5	16.1
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	26.2	16
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	58.2	11.9
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | 2028 Notes Embedded Derivative [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	0.4	2.3
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contract [Member] | Other Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value		0.2
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Interest Rate Swaps Current | Current Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	0.7
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Interest Rate Swaps Noncurrent | Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 1.6	$ 4

Derivatives and Fair Value Me_5

Derivatives and Fair Value Measurements - Volume of Company 's Activity in Derivative Instruments (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)T	Dec. 31, 2020USD ($)T
Hot Roll Coil Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	155,080	125,220
Aluminum Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	18,800	20,264
Nickel Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	750	345
Foreign Exchange Contract [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 1,000,000	$ 7,400,000
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 160,000,000	$ 160,000,000

Derivatives and Fair Value Me_6

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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives			$ (37.7)	$ 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	$ (4.8)	$ 1.9	(45.7)	1.3
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	(3.8)	2	(43.9)	$ 1.3
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | 2028 Notes Embedded Derivative [Member] | Other Income and (Expense), Net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	(0.9)		(1.9)
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Exchange Contract [Member] | Other Income and (Expense), Net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives		$ (0.1)	0.2
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Interest Rate Swap [Member] | Interest and Other Expense on Debt [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivatives	(0.1)		(0.1)
Amount of Gain/(Loss) Recognized in Income on Derivatives	$ (0.5)		$ (1.6)

Derivatives and Fair Value Me_7

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	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
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	$ (0.5)	$ (1.1)

Derivatives and Fair Value Me_8

Derivatives and Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	$ 26.6	$ 18.3
Liability Derivatives, Fair Value	60.5	16.1
Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability Derivatives, Fair Value	60.5	16.1
Fair Value, Measurements, Recurring [Member] | 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]
Asset Derivatives, Fair Value	26.2	16
Liability Derivatives, Fair Value	58.2	11.9
Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Level 2 [Member] | Interest Rate Swaps [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability Derivatives, Fair Value	2.3	4
Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Level 2 [Member] | Foreign Exchange Contract [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] | Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Level 3 [Member] | 2028 Notes Embedded Derivative [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Derivatives, Fair Value	$ 0.4	$ 2.3

Derivatives and Fair Value Me_9

Derivatives and Fair Value Measurements - Financial Instruments Measured at Fair Value (Details) - 2028 Notes Embedded Derivative [Member] - Level 3 [Member] $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at January 1, 2021	$ 2.3
Unrealized loss recorded in other income and (expense), net	(1.9)
Balance at September 30, 2021	$ 0.4

Derivatives and Fair Value M_10

Derivatives and Fair Value Measurements - Carrying and Estimated Fair Values Financial Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Carrying Amount [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	$ 39.9	$ 61.4
Restricted cash	1.1	1.1
Receivables less provisions	699.7	378.9
Accounts payable	612.4	365.1
Long-term debt, including current portion	672.6	740
Fair Value [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	39.9	61.4
Restricted cash	1.1	1.1
Receivables less provisions	699.7	378.9
Accounts payable	612.4	365.1
Long-term debt, including current portion	$ 706.6	$ 800.3

Stockholders' Equity, Accumul_3

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Beginning Balance	$ 293.5	$ 174.7	$ 145.1	$ 163.7	$ 185.4	$ 178.6	$ 145.1	$ 178.6
Beginning Balance, shares			38,329,897				38,329,897
Beginning Balance Treasury Stock, shares			212,500				212,500
Net income (loss)	50	113.3	$ 25.6	(39.7)	(25.5)	16.4	$ 188.9	(48.8)
Foreign currency translation	(3.5)	1.6		1.2	1.6	(8.5)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax	90.7	2	2	5.8	2	1.8
Share repurchases	(0.9)
Stock-based compensation expense	1.2	1.5	1.6	0.4	0.4	0.6
Cash dividends	(3.1)
Interest rate swap, net of tax	0.4	0.4	0.4
Cash flow hedge - interest rate swap, net of tax				0.3		(3.5)
Dividends paid to non-controlling interest					(0.2)			(0.2)
Ending Balance	$ 428.3	293.5	174.7	131.7	163.7	185.4	$ 428.3	131.7
Ending Balance, shares	38,687,094						38,687,094
Ending Balance Treasury Stock, shares	251,427						251,427
Common Stock [Member]
Beginning Balance	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4
Beginning Balance, shares	38,687,000	38,330,000	38,330,000	38,330,000	37,996,000	37,996,000	38,330,000	37,996,000
Stock-based compensation expense, shares		357,000			334,000
Ending Balance	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4	$ 0.4
Ending Balance, shares	38,687,000	38,687,000	38,330,000	38,330,000	38,330,000	37,996,000	38,687,000	38,330,000
Treasury Stock [Member]
Beginning Balance	$ (6.6)	$ (6.6)	$ (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	213,000	213,000
Share repurchases	$ (0.9)
Shares repurchases treasury stock, Shares	38,000
Ending Balance	$ (7.5)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (6.6)	$ (7.5)	$ (6.6)
Ending Balance Treasury Stock, shares	251,000	213,000	213,000	213,000	213,000	213,000	251,000	213,000
Capital in Excess of Par Value [Member]
Beginning Balance	$ 386.2	$ 384.7	$ 383.1	$ 382.2	$ 381.8	$ 381.2	$ 383.1	$ 381.2
Stock-based compensation expense	1.2	1.5	1.6	0.4	0.4	0.6
Ending Balance	387.4	386.2	384.7	382.6	382.2	381.8	387.4	382.6
Retained Earnings (Accumulated Deficit) [Member]
Beginning Balance	172	59.1	33.8	90.4	116	99.6	33.8	99.6
Net income (loss)	49.7	112.9	25.3	(39.9)	(25.6)	16.4
Cash dividends	(3.1)
Ending Balance	218.6	172	59.1	50.5	90.4	116	218.6	50.5
Foreign Currency Translation [Member]
Beginning Balance	(45.4)	(46.9)	(47)	(55.4)	(57.1)	(48.6)	(47)	(48.6)
Foreign currency translation	(3.4)	1.5	0.1	1.2	1.7	(8.5)
Ending Balance	(48.8)	(45.4)	(46.9)	(54.2)	(55.4)	(57.1)	(48.8)	(54.2)
Benefit Plan Liabilities [Member]
Beginning Balance	(217.8)	(219.8)	(221.8)	(249.3)	(251.3)	(253.1)	(221.8)	(253.1)
Changes in defined benefit pension and other post-retirement benefit plans, net of tax	90.7	2	2	5.8	2	1.8
Ending Balance	(127.1)	(217.8)	(219.8)	(243.5)	(249.3)	(251.3)	(127.1)	(243.5)
Interest Rate Swap [Member]
Beginning Balance	(2.3)	(2.7)	(3.1)				(3.1)
Interest rate swap, net of tax	0.4	0.4	0.4
Ending Balance	(1.9)	(2.3)	(2.7)				(1.9)
Cash Flow Hedge - Interest Rate Swap [Member]
Beginning Balance				(3.8)	(3.8)	(0.3)		(0.3)
Cash flow hedge - interest rate swap, net of tax				0.3		(3.5)
Ending Balance				(3.5)	(3.8)	(3.8)		(3.5)
Non-controlling Interest [Member]
Beginning Balance	7	6.5	6.3	5.8	6	6	6.3	6
Net income (loss)	0.3	0.4	0.3	0.2	0.1
Foreign currency translation	(0.1)	0.1	(0.1)		(0.1)
Dividends paid to non-controlling interest					(0.2)
Ending Balance	$ 7.2	$ 7	$ 6.5	$ 6	$ 5.8	$ 6	$ 7.2	$ 6

Stockholders' Equity, Accumul_4

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Equity [Abstract]
Changes in defined benefit pension and other post-retirement benefit plans, tax	$ 31.1	$ 0.6	$ 0.5	$ 2	$ 0.7	$ 0.6
Changes in interest rate swap, tax	$ 0.1	$ 0.2	$ 0.1	$ 0.1		$ 1.2

Stockholders' Equity, Accumul_5

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Changes in Accumulated Other Comprehensive Income/(Loss) Net of Tax by Component (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	$ (271.9)
Accumulated other comprehensive income (loss) net of tax, ending balance	(177.8)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(47)
Other comprehensive income before reclassifications	(1.8)
Net current-period other comprehensive income	(1.8)
Accumulated other comprehensive income (loss) net of tax, ending balance	(48.8)
Benefit Plan Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(221.8)
Other comprehensive income before reclassifications	13.1
Amounts reclassified from accumulated other comprehensive income into net income	81.6
Net current-period other comprehensive income	94.7
Accumulated other comprehensive income (loss) net of tax, ending balance	(127.1)
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss) net of tax, beginning balance	(3.1)
Amounts reclassified from accumulated other comprehensive income into net income	1.2
Net current-period other comprehensive income	1.2
Accumulated other comprehensive income (loss) net of tax, ending balance	$ (1.9)

Stockholders' Equity, Accumul_6

Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	$ (0.1)	$ (0.1)	$ (0.4)	$ (0.3)
Net of tax	0.4	0.4	1.2	0.8
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	2.4	2.5	7.3	7.5
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items, Pension Settlement [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	98.4	53.2	98.8	54.3
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	(0.1)	(0.5)	(0.3)	(1.5)
Amortization of Defined Benefit Pension and Other Post-retirement Benefit Plan Items [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	100.7	55.2	105.8	60.3
Tax benefit	(23.1)	(14.3)	(24.2)	(15.6)
Net of tax	77.6	40.9	81.6	44.7
Accumulated Gain Loss Net Realized Swap Interest Subsequent to De-Designation [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Realized swap interest	$ 0.5		$ 1.6
Accumulated Gain Loss Net Cash Flow Hedge Parent Realized Swap Interest Prior to De-Designation [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Realized swap interest		$ 0.5		$ 1.1

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)Segment	Dec. 31, 2020USD ($)
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 | $	$ 702.6	$ 380.6
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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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	31.00%	28.00%	31.00%	26.00%
Carbon Steel Plate [Member]
Product Line
Percentage of sales by major product lines	10.00%	8.00%	10.00%	9.00%
Carbon Steel Long [Member]
Product Line
Percentage of sales by major product lines	13.00%	13.00%	13.00%	15.00%
Stainless Steel Flat [Member]
Product Line
Percentage of sales by major product lines	19.00%	16.00%	18.00%	16.00%
Stainless Steel Plate [Member]
Product Line
Percentage of sales by major product lines	5.00%	4.00%	4.00%	5.00%
Stainless Steel Long [Member]
Product Line
Percentage of sales by major product lines	4.00%	5.00%	4.00%	5.00%
Aluminum Flat [Member]
Product Line
Percentage of sales by major product lines	11.00%	16.00%	13.00%	14.00%
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	4.00%	5.00%	4.00%	5.00%
Other [Member]
Product Line
Percentage of sales by major product lines	1.00%	2.00%	1.00%	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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Net sales	$ 1,575.1	$ 831.5	$ 4,141.4	$ 2,613.6
United States [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,431.3	737.9	3,733.8	2,337.7
Foreign Countries [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 143.8	$ 93.6	$ 407.6	$ 275.9

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Revenues by Type of Item Sold (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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	90.00%	89.00%	90.00%	88.00%
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Revenue on products with no alternative use	10.00%	11.00%	10.00%	12.00%

Revenue Recognition - Summary_3

Revenue Recognition - Summary of Significant Changes in Contract Assets and Contract Liabilities Balances (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Changes in the Contract Assets
Beginning Balance	$ 10.8
Net change in contract assets for products with no alternative use during the period	6.9
Changes to reserves	0.4
Ending Balance	18.1
Changes in the Contract Liabilities
Beginning Balance	10.8
Contract liability satisfied during the period	(9.7)
Contract liability incurred during the period	10.9
Net change in contract liabilities for products with no alternative use during the period	0.1
Changes to reserves	1.7
Ending Balance	$ 13.8

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information 1 (Detail)	Sep. 30, 2021
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligations on contracts have expected duration	1 year

Provision for Credit Losses - S

Provision for Credit Losses - Schedule of Reconciliation of Provision for Credit Losses (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Credit Loss [Abstract]
Balance at January 1, 2021	$ 1.7
Current period provision	1.8
Write-offs charged against allowance	(0.7)
Recoveries	0.2
Foreign currency translation	(0.1)
Balance at September 30, 2021	$ 2.9

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax [Line Items]
Provision for income taxes	$ 16.1		$ (19.3)	$ 62.2	$ (20.9)
Valuation allowance	6.1			6.1		$ 6.6
Reserves released for unrecognized tax benefits		$ (0.7)
Unrecognized tax benefits balance	1			1		$ 1.7
GILTI [Member]
Income Tax [Line Items]
Provision for income taxes	$ 0.4		$ 2	$ 0.7	$ 0.5

Earnings (Loss) Per Share - Add

Earnings (Loss) Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Weighted average number of shares excluded from computation of earnings per share	44,909	250,356	42,262	259,244

Earnings (Loss) Per Share - Cal

Earnings (Loss) Per Share - Calculation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss) attributable to Ryerson Holding Corporation	$ 49.7	$ (39.9)	$ 187.9	$ (49.1)
Denominator:
Weighted average shares outstanding	38,470	38,117	38,350	37,994
Dilutive effect of stock-based awards	621		472
Weighted average shares outstanding adjusted for dilutive securities	39,091	38,117	38,822	37,994
Earnings (loss) per share
Basic	$ 1.29	$ (1.05)	$ 4.90	$ (1.29)
Diluted	$ 1.27	$ (1.05)	$ 4.84	$ (1.29)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] $ / shares in Units, $ in Millions	Nov. 03, 2021$ / shares	Oct. 04, 2021USD ($)ft²Lease
Subsequent Event [Line Items]
Quarterly Cash Dividends Per Share Declared | $ / shares	$ 0.085
Anticipated lease start date		May 1, 2023
Lease area | ft²		897,000
Lease term		184 months
Annual rent payments next twelve months		$ 7.3
Renewal options | Lease		4
Renewal term		5 years
Increase in percentage of rent amount		2.25%
Lease assets and liabilities		$ 100
Common Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Date declared	Nov. 3, 2021
Dividend Payable, Date to be paid	Dec. 16, 2021
Dividends Payable, Date of Record	Nov. 15, 2021