v3.26.1
CAPITAL STOCK - Schedule of SBC Expense and TRS Fair Value Adjustments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Employee SBC expense $ 19.3 $ 15.2 $ 49.8 $ 41.2
Total TRS FVAs: gains (104.1) (97.4) (87.1) (78.3)
Combined effect of employee SBC expense and TRS FVAs (84.8) (82.2) (37.3) (37.1)
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Employee SBC expense 9.6 7.3 23.2 17.4
Total TRS FVAs: gains (48.4) (40.6) (40.9) (33.1)
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Employee SBC expense 9.7 7.9 26.6 23.8
Total TRS FVAs: gains (55.7) (56.8) (46.2) (45.2)
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | Director        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Employee SBC expense $ 0.6 $ 0.5 $ 1.2 $ 1.1