v3.25.4
SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Total segment income $ 1,040.7 $ 599.3 $ 338.3
Finance costs 52.6 52.1 78.9
Miscellaneous expense (income) 4.9 15.0 (46.6)
Employee SBC expense 69.8 57.4 55.6
Total return swap (TRS) fair value adjustments (253.0) (91.0) (45.6)
Restructuring and other charges, net of recoveries 29.7 19.4 12.1
Earnings before income taxes 983.2 532.2 306.0
Operating Segments      
Segment Reporting Information [Line Items]      
Total segment income 927.0 622.6 441.6
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment      
Segment Reporting Information [Line Items]      
Finance costs 52.6 52.1 78.9
Miscellaneous expense (income) 4.9 15.0 (46.6)
FCC Transitional ADJ: (gains) 0.0 (1.3) (1.2)
Employee SBC expense 69.8 57.4 55.6
Total return swap (TRS) fair value adjustments (253.0) (91.0) 0.0
Amortization of intangible assets (excluding computer software) 39.8 38.8 36.8
Restructuring and other charges, net of recoveries 29.7 19.4 12.1
TRS FVAs      
Segment Reporting Information [Line Items]      
Loss (gain) recognized on derivative instruments: 0.0 0.0 (45.6)
ATS | Operating Segments      
Segment Reporting Information [Line Items]      
Total segment income $ 169.1 $ 144.1 $ 155.0
Segment margin, percentage 5.30% 4.60% 4.70%
CCS | Operating Segments      
Segment Reporting Information [Line Items]      
Total segment income $ 757.9 $ 478.5 $ 286.6
Segment margin, percentage 8.20% 7.40% 6.20%