v3.26.1
Income Taxes - Income/(Loss) Before Tax and Income Tax Expense/(Benefit) Attributable to that Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Foreign:      
Income from operations before income taxes $ 444.1 $ 464.1 $ 402.6
Current tax (benefit)/expense, Total 81.6 66.6 65.6
Deferred tax, Total 22.3 (88.6) (197.7)
Total tax expense/(benefit) $ 103.9 (22.0) (132.1)
Bermuda tax rate 23.40%    
Bermuda      
Income Tax Examination [Line Items]      
Income/(loss) before tax, domestic $ 109.7 85.3 148.8
Current tax expense, domestic 2.1 0.0 0.0
Deferred tax expense/(benefit), domestic 7.7 1.3 (201.1)
Total income tax expense, domestic $ 9.8 1.3 (201.1)
Foreign:      
Bermuda tax rate 15.00%    
United States:      
Foreign:      
Income/(loss) before tax $ 293.6 269.0 236.3
Current tax expense 57.4 62.7 52.4
Deferred tax expense/(benefit) 5.3 (4.4) 3.0
Total income tax expense 62.7 58.3 55.4
United Kingdom:      
Foreign:      
Income/(loss) before tax (21.4) 106.9 0.7
Current tax expense 15.6 3.9 5.3
Deferred tax expense/(benefit) 9.8 (85.3) 0.1
Total income tax expense 25.4 (81.4) 5.4
Other foreign jurisdictions      
Foreign:      
Income/(loss) before tax 62.2 2.9 16.8
Current tax expense 6.5 0.0 7.9
Deferred tax expense/(benefit) (0.5) (0.2) 0.3
Total income tax expense $ 6.0 $ (0.2) $ 8.2