XML 64 R42.htm IDEA: XBRL DOCUMENT
v3.22.4

Business Combinations and Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Oct. 01, 2022 | Jul. 29, 2022 | Apr. 01, 2022 | Jan. 31, 2022 | Aug. 31, 2020 | Mar. 01, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price paid in cash | $ 134,090 |  | $ 60,012 |  |  |  |  |  |
Percentage of employer's profit sharing contribution | 8.00% | 8.00% | 8.00% |  |  |  |  |  |
New Process Steel LP |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity interest acquired |  |  |  |  |  |  | 45.00% |  |
ROCA ACERO, S.A. de C.V. |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of interest (as a percent) |  |  |  | 100.00% |  |  |  |  |
Unity Aluminum, Inc |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of interest (as a percent) |  |  |  |  | 94.40% |  |  |  |
United Steel Supply, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of interest (as a percent) |  |  |  |  |  |  |  |  | 75.00%
Percentage of voting equity interests remaining available |  |  |  |  |  | 12.50% |  |  |
United Steel Supply, LLC | Option to Purchase Remaining Equity Interest After Fourth Anniversary |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Percentage of voting equity interests remaining available |  |  |  |  |  |  |  |  | 12.50%
Zimmer, S.A. de C.V. |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Acquisition of interest (as a percent) |  |  |  |  |  |  |  | 100.00% |

X
- Definition Percentage of voting equity interests remaining available to be acquired after the acquisition date in the business combination. + References No definition available. + Details
Name: | stld_BusinessAcquisitionPercentageOfVotingInterestsAvailableToBeAcquired
Namespace Prefix: | stld_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the employer's contribution as percentage of consolidated pretax earnings, to the profit sharing plans. + References No definition available. + Details
Name: | stld_DefinedContributionPlanPercentageOfEmployersContributionOfPretaxEarningsToProfitSharingPlan
Namespace Prefix: | stld_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=stld_NewProcessSteelLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stld_RocaAceroS.a.DeC.v.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stld_UnityAluminumInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stld_UnitedSteelSupplyLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=stld_OptionToPurchaseRemainingEquityInterestAfterFourthAnniversaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stld_ZimmerS.a.DeC.v.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |