XML 57 R44.htm IDEA: XBRL DOCUMENT
v3.25.2

Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 USD ($) installment $ / shares shares | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Director |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Compensation expense | $ 0.1 | $ 0.1 |
RSUs |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Share based payment award, grants in period (in shares) | shares | 303,093 |  |
Fair value grant (in dollars per share) | $ / shares | $ 9.03 |  |
Number of annual installment in which stock option exercisable (in installments) | installment | 3 |  |
Period from grant date for annual installment (in years) | 1 year |  |
PSUs | Minimum |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Percent of original award granted | 25.00% |  |
PSUs | Maximum |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Percent of original award granted | 240.00% |  |
Restricted Stock Units Settled in Cash |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Share based payment award, grants in period (in shares) | shares | 147,344 |  |
Fair value grant (in dollars per share) | $ / shares | $ 9.20 |  |
Number of annual installment in which stock option exercisable (in installments) | installment | 3 |  |
Period from grant date for annual installment (in years) | 1 year |  |
Award liability | $ 1.1 |  | $ 2.6
Cash incentive award | Suncoke LTCIP |  |  |
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items] |  |  |
Award liability | 3.8 |  | $ 6.8
Grant date fair value of award | $ 1.9 |  |
Percent of award allocation | 50.00% |  |
Measurement period | 3 years |  |

X
- Definition Number of annual Installment in which stock option exercisable. + References No definition available. + Details
Name: | sxc_NumberOfAnnualInstallmentInWhichEquityInstrumentsVestAndBecomeIssuable
Namespace Prefix: | sxc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period from grant date for annual installment. + References No definition available. + Details
Name: | sxc_PeriodFromGrantDateForAnnualInstallment
Namespace Prefix: | sxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-base Payment Award, Terms of Award, Percentage Adjustment of Award Determined by Pre-Tax Return on Capital + References No definition available. + Details
Name: | sxc_ShareBasedCompensationArrangementByShareBasePaymentAwardTermsOfAwardPercentageAdjustmentOfAwardDeterminedByPreTaxReturnOnCapital
Namespace Prefix: | sxc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Measurement Period + References No definition available. + Details
Name: | sxc_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsMeasurementPeriod
Namespace Prefix: | sxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value + References No definition available. + Details
Name: | sxc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantsinPeriodFairValue
Namespace Prefix: | sxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Percent of Award Allocation + References No definition available. + Details
Name: | sxc_SharebasedCompensationArrangementbySharebasedPaymentAwardPercentofAwardAllocation
Namespace Prefix: | sxc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DeferredCompensationArrangementWithIndividualShareBasedPaymentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=sxc_RestrictedStockUnitsSettledInCashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=sxc_CashIncentiveAwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=sxc_SuncokeLTCIPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |