v3.25.4
STOCKHOLDERS' EQUITY - Summary of Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net income before tax $ (66.0) $ 91.0 $ 78.0 $ 97.0 $ (199.0) $ 287.0 $ 1.0 $ 28.0 $ 200.0 $ 117.0 $ (279.0)
Tax expense                 102.0 213.0 (217.0)
Net (loss) income $ (120.0) $ (107.0) $ 70.0 $ (581.0) $ (106.0) $ 464.0 $ 182.0 $ 198.0 (738.0) 738.0 462.0
Reclassification out of Accumulated Other Comprehensive Loss                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net (loss) income                 (5.0) (1.0) (41.0)
Reclassification out of Accumulated Other Comprehensive Loss | Cumulative translation adjustments                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net income before tax                 0.0 0.0 (9.0)
Reclassification out of Accumulated Other Comprehensive Loss | Pension and other post-employment benefit plans                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net income before tax                 (6.0) (2.0) (35.0)
Tax expense                 1.0 1.0 3.0
Net (loss) income                 $ (5.0) $ (1.0) $ (32.0)