v3.26.1
CONDENSED COMBINED DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Debtors' Statements of Operations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
CONDENSED COMBINED DEBTOR-IN-POSSESSION FINANCIAL INFORMATION            
Net sales $ 845.4   $ 784.3   $ 1,570.1 $ 1,569.1
Cost of sales (745.7)   (747.7)   (1,408.7) (1,468.7)
Gross Profit 99.7   36.6   161.4 100.4
Selling, general and administrative expenses 100.8   78.1   188.2 169.1
Equity in earnings of unconsolidated affiliate 1.2   8.2   3.3 6.4
Operating income (loss) 0.1   (33.3)   (23.5) (62.3)
Interest expense, net 72.4   69.5   151.1 136.1
Reorganization items, net 41.3       41.3  
Other expense (income), net 5.5   0.2   9.7 (23.0)
Loss before income taxes 119.1   103.0   225.6 175.4
Provision for income taxes 0.5   2.5   9.9 9.1
Net loss (119.6) $ (115.9) $ (105.5) $ (79.0) (235.5) $ (184.5)
Trinseo PLC and certain direct and indirect subsidiaries            
CONDENSED COMBINED DEBTOR-IN-POSSESSION FINANCIAL INFORMATION            
Net sales 252.5       476.5  
Cost of sales 219.3       405.3  
Gross Profit 33.2       71.2  
Selling, general and administrative expenses 59.0       110.3  
Equity in earnings of unconsolidated affiliate         2.1  
Operating income (loss) (25.8)       (37.0)  
Interest expense, net 69.7       146.4  
Reorganization items, net 41.3       41.3  
Other expense (income), net (15.7)       3.7  
Loss before income taxes (121.1)       (228.4)  
Provision for income taxes (2.0)       2.7  
Net loss $ (119.1)       $ (231.1)