v3.26.1
Segment Information - Segment Adjusted EBITDA Reconciliation to Net Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reconciling items to consolidated net income:        
Net realized losses on investments and fair value changes to equity securities $ (10.2) $ (21.7) $ (31.4) $ (37.7)
Other adjustments (1.0) 2.4 3.6 0.2
Income before income tax expense 376.9 289.0 712.5 472.7
Income tax expense 78.3 53.7 139.8 90.8
Net income 298.6 235.3 572.7 381.9
Corporate and Other        
Segment Reporting [Line Items]        
Adjusted EBITDA (40.0) (29.8) (71.9) (57.8)
Other Reconciling Items        
Reconciling items to consolidated net income:        
Interest expense (28.4) (26.7) (56.7) (53.5)
Depreciation expense (44.7) (35.9) (88.0) (71.0)
Amortization of purchased intangible assets (18.0) (15.1) (35.7) (33.5)
Net realized losses on investments and fair value changes to equity securities (10.2) (21.7) (31.4) (37.7)
Total reconciling items (102.3) (97.0) (208.2) (195.5)
Global Lifestyle | Operating Segments        
Segment Reporting [Line Items]        
Adjusted EBITDA 244.4 201.4 481.1 399.2
Global Housing | Operating Segments        
Segment Reporting [Line Items]        
Adjusted EBITDA $ 274.8 $ 214.4 $ 511.5 $ 326.8