v3.25.3
RESTRUCTURING CHARGES (Tables)
 9 Months Ended
Sep. 30, 2025
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Reserve by Type of Cost The following table summarizes the 2025 and 2024 restructuring activity by component and the remaining balances in accrued restructuring costs as of September 30, 2025 and 2024:
Employee Severance and Related Benefit CostsLease and Other Contract Termination CostsFacility Exit CostsTotal
Changes in Reserve($ in millions)
Balance at January 1, 2024$10.8 $16.7 $— $27.5 
Restructuring charges:
First quarter— — 8.3 8.3 
Second quarter— 1.7 5.1 6.8 
Third quarter— 2.9 5.0 7.9 
Amounts utilized(8.4)(9.9)(18.4)(36.7)
Balance at September 30, 2024$2.4 $11.4 $— $13.8 
Balance at January 1, 2025$3.1 $5.2 $— $8.3 
Restructuring charges:
First quarter1.6 0.2 2.2 4.0 
Second quarter3.8 — 3.6 7.4 
Third quarter0.6 — 2.3 2.9 
Amounts utilized(4.2)(1.7)(8.1)(14.0)
Balance at September 30, 2025$4.9 $3.7 $— $8.6 
Cumulative Restructuring Charges by Type and Plan
The following table summarizes the cumulative restructuring charges for each segment related to the restructuring and optimization efforts summarized above, by component, through September 30, 2025:
Chlor Alkali Products and VinylsEpoxyTotal
Cumulative Restructuring Charges($ in millions)
Write-off of equipment and facility$61.6 $18.3 $79.9 
Employee severance and related benefit costs2.1 21.6 23.7 
Facility exit costs58.8 37.6 96.4 
Lease and other contract termination costs6.4 34.3 40.7 
Total cumulative restructuring charges$128.9 $111.8 $240.7