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Share-Based Compensation - Schedule of Share-Based Compensation of PSU Activity (Details) - PSUs - Suncoke LTPEP | 6 Months Ended
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Jun. 30, 2025 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
PSUs, shares (in shares) | shares | 112,856
PSUs, weighted average grant date fair value per unit (in dollars per share) | $ / shares | $ 9.22
Pre-Tax Return of Capital for Coke and Coal Logistics Businesses |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Percent of award allocation | 50.00%
Measurement period | 3 years
TSR |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Measurement period | 3 years
TSR | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Measurement results payout percentage | 80.00%
TSR | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Measurement results payout percentage | 120.00%

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