v3.25.2
Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income            
Actuarial losses $ (2.7)   $ (2.1)   $ (4.2) $ (7.6)
Tax expense (9.1)   (9.7)   (16.9) (11.5)
Net income 26.4 $ 24.5 26.7 $ 12.5 50.9 39.2
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)            
Reclassification Adjustment out of Accumulated Other Comprehensive Income            
Adjusted Segment EBITDA 0.6   0.4   1.2 0.8
Tax expense (0.2)   (0.2)   (0.2) (0.3)
Net income 0.4   0.2   1.0 0.5
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Actuarial losses            
Reclassification Adjustment out of Accumulated Other Comprehensive Income            
Actuarial losses $ 0.6   $ 0.4   $ 1.2 $ 0.8