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v3.25.2

Debt - Covenants (Narrative) (Details) - Credit Agreement and Partner Revolver $ in Millions | Jun. 30, 2025 USD ($)
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Line of Credit Facility [Line Items] |
Maximum consolidated net leverage ratio | 4.50
Minimum consolidated interest coverage ratio | 2.50
SunCoke Energy Partners, L.P. |
Line of Credit Facility [Line Items] |
Cross default covenant threshold | $ 35.0

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