v3.26.1
SEGMENT REPORTING - Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Segment Reporting [Line Items]            
Net sales $ 0.0 $ 0.0 $ 0.0 $ 59.8    
Depreciation and amortization     0.0 (1.6)    
Income tax (expense) benefit (1.2) 1.8 (4.8) (25.2)    
Interest expense, net 0.0 0.0 0.0 (1.6)    
Loss on remeasurement of TRA liability (6.2) 0.0 (28.1) 0.0    
Net income (loss) 50.3 (26.1) (184.7) (4.6)    
Total cash 7.7 4.8 7.7 4.8 $ 114.6 $ 77.5
Total assets 3,462.4 272.6 3,462.4 272.6 $ 517.3  
Operating Segments            
Segment Reporting [Line Items]            
Net sales 473.2 119.6 881.0 223.5    
Material 138.1 20.7 264.4 39.5    
Personnel 133.3 29.2 260.6 58.5    
Overhead 45.7 12.5 81.0 25.3    
Professional fees 8.0 3.3 14.1 8.4    
Management fees 13.6 3.4 26.5 4.5    
Sales and marketing 5.2 0.3 9.7 0.6    
Other segment expenses 9.2 1.6 15.8 2.2    
Adjusted EBITDA 120.1 48.6 208.9 84.5    
Corporate Adjusted EBITDA (6.2) (2.3) (10.0) (3.4)    
Depreciation and amortization (64.3) (2.3) (123.6) (4.6)    
Stock-based compensation (6.1) (5.1) (10.1) (10.8)    
Income tax (expense) benefit (23.3) 1.8 (30.1) (25.2)    
Interest expense, net (33.0) (2.1) (62.5) (4.5)    
Foreign currency gains 1.9   4.2      
Husky Transaction costs (1.3)   (94.2)      
Loss on disposal of assets (0.3)   (0.9)      
Severance cost (3.6)   (4.1)      
Loss on remeasurement of TRA liability (6.2)   (28.1)      
Fair Value Inventory Step-Up (23.6)   (23.6)      
Gain (Loss) on debt extinguishment 96.2   (10.6)      
Mark to market adjustments, net   (64.1)   (35.0)    
Spin-Off costs   (0.6)   (5.6)    
Net income (loss) 50.3 (26.1) (184.7) (4.6)    
Operating Segments | CompoSecure Holdings, L.L.C            
Segment Reporting [Line Items]            
Net sales 133.6 119.6 264.0 223.5    
Material 22.0 20.7 49.0      
Personnel 31.7 29.2 64.7 58.5    
Overhead 13.1 12.5 25.3 25.3    
Professional fees 3.3 3.3 6.3 8.4    
Management fees 4.7 3.4 9.2 4.5    
Sales and marketing 0.7 0.3 1.1 0.6    
Other segment expenses 2.9 1.6 5.6 2.2    
Adjusted EBITDA 55.2 48.6 102.8 84.5    
Total cash 33.5 91.7 33.5 91.7    
Total assets 215.6 242.6 215.6 242.6    
Operating Segments | Husky Holdings            
Segment Reporting [Line Items]            
Net sales 339.6   617.0      
Material 116.1   215.4      
Personnel 101.6   195.9      
Overhead 32.6   55.7      
Professional fees 4.7   7.8      
Management fees 8.9   17.3      
Sales and marketing 4.5   8.6      
Other segment expenses 6.3   10.2      
Adjusted EBITDA 64.9   106.1      
Total cash 71.3   71.3      
Total assets 5,859.6   5,859.6      
Elimination            
Segment Reporting [Line Items]            
Total cash (97.1) (86.9) (97.1) (86.9)    
Total assets $ (2,612.8) $ 30.0 $ (2,612.8) $ 30.0