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Long-Term Debt - Ryerson Credit Facility - Additional Information (Detail) - USD ($) |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 29, 2022 | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 28, 2022
Ryerson Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Revolving credit facility maximum borrowing capacity | $ 1,300,000,000 |  |  | $ 1,000,000,000
Credit facility maturity date | Jun. 29, 2027 |  |  |
Outstanding borrowings |  | $ 511,500,000 | $ 470,000,000 |
Letters of credit |  | 1,000,000 | 1,000,000 |
Available credit facility |  | $ 407,000,000 | $ 376,000,000 |
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. |  |
Debt instrument basis spread reduction rate |  | 0.125% |  |
Debt instrument basis spread leverage ratio |  | 3.5 |  |
Default bear interest rate |  | 2.00% |  |
Commitment fees on amounts not borrowed |  | 0.20% |  |
Weighted average interest rate |  | 5.70% | 5.90% |
Ryerson Credit Facility [Member] | US Borrower [Member] | Federal Funds Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.50% |  |
Ryerson Credit Facility [Member] | US Borrower [Member] | Term SOFR Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 1.00% |  |
Ryerson Credit Facility [Member] | US Borrower [Member] | Prime Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.50% |  |
Ryerson Credit Facility [Member] | Canadian Borrower [Member] | Term SOFR Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 1.00% |  |
Ryerson Credit Facility [Member] | Minimum [Member] | Base Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.25% |  |
Ryerson Credit Facility [Member] | Minimum [Member] | SOFR Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 1.25% |  |
Ryerson Credit Facility [Member] | Maximum [Member] | Base Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.50% |  |
Ryerson Credit Facility [Member] | Maximum [Member] | SOFR Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 1.50% |  |
Old Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility maturity date | Nov. 05, 2025 |  |  |
One-month Interest Period [Member] | Ryerson Credit Facility [Member] | CORRA Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.30% |  |
Three-month Interest Period [Member] | Ryerson Credit Facility [Member] | CORRA Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over base interest rate |  | 0.32% |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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