v3.26.3
EQUITY METHOD INVESTMENT - Spin-Off and Deconsolidation (Details) - USD ($)
$ in Millions
 3 Months Ended 7 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Debt Securities, Available-for-Sale [Line Items]          
Net sales $ 0.0 $ 0.0   $ 0.0 $ 59.8
Cost of sales 0.0 0.0   0.0 31.1
Gross profit 0.0 0.0   0.0 28.7
Operating expenses:          
Income (loss) from operations (5.8) (9.9)   (70.8) (6.6)
Other income (expense):          
Interest expense 0.0 0.0   0.0 (1.7)
Interest income 0.0 0.3   0.2 0.5
Total other income (expense), net 0.0 (174.6)   (27.9) (211.1)
Income (loss) before income taxes (5.8) (184.5)   (98.7) (217.7)
Income tax (expense) benefit 7.0 (29.8)   2.2 (55.0)
Net income (loss) 76.0 (174.7)   (108.7) $ (179.3)
GPGI Holdings          
Debt Securities, Available-for-Sale [Line Items]          
Net sales 509.6 120.9 $ 284.6 1,390.6  
Cost of sales 300.7 49.6 118.7 861.1  
Gross profit 208.9 71.3 165.9 529.5  
Operating expenses:          
Selling, general and administrative expenses 100.0 29.6 67.4 409.0  
Income (loss) from operations 108.9 41.7 98.5 120.5  
Other income (expense):          
Interest expense (32.4) (3.6) (8.9) (95.4)  
Interest income 0.3 1.5 3.8 0.6  
Gain (loss) on debt extinguishment 0.0 0.0 0.0 (10.6)  
Total other income (expense), net (32.1) (2.1) (5.1) (105.4)  
Income (loss) before income taxes 76.8 39.6 93.4 15.1  
Income tax (expense) benefit (2.0) 0.0 0.0 (27.3)  
Net income (loss) $ 74.8 $ 39.6 $ 93.4 $ (12.2)