v3.25.2
Long-Duration Insurance Contracts - Balances of and Changes in the LFPB (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Mar. 31, 2025
Dec. 31, 2023
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Net liability for future policy benefits $ 1,624.4 $ 1,624.4 $ 1,622.8    
Whole Life          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 231.0 229.1      
Beginning period (including reserves)         $ 223.2
Beginning balance at original discount rate 262.0 263.2      
Beginning balance at original discount rate (including reserves)     247.1    
Change in cash flow assumptions     0.0 $ 0.0 13.8
Actual variances from expected experience     1.3 1.9 3.2
Adjusted balance     264.5 263.9 264.1
Issuances 3.4 5.9 12.6    
Interest accruals 2.1 4.1 7.6    
Net premiums collected (4.7) (9.8) (21.1)    
Ending balance at original discount rate 264.7 264.7 263.2    
Effect of changes in discount rate assumptions (30.3) (30.3) (34.1)    
Ending balance 234.4 234.4 229.1    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 510.7 504.3      
Beginning balance (including reserves)     522.0    
Beginning balance at original discount rate 622.1 622.1 617.4 618.2  
Beginning balance at original discount rate (including reserves)     592.1    
Changes in cash flow assumptions     0.0 0.0 13.7
Actual variances from expected experience     2.0 3.1 3.4
Adjusted balance     619.4 621.3 609.2
Issuances 3.5 5.9 12.6    
Interest accruals 5.2 10.4 19.8    
Benefit payments (7.9) (13.6) (24.2)    
Ending balance at original discount rate 622.1 622.1 617.4    
Effect of changes in discount rate assumptions (108.1) (108.1) (113.1)    
Ending balance 514.0 514.0 504.3    
Net liability for future policy benefits 279.5 279.5 275.2    
Less: Reinsurance recoverable (60.1) (60.1) (60.2)    
Net liability for future policy benefits, after reinsurance recoverable 219.4 219.4 215.0    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits 219.4 219.4 215.0    
Term Life          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 249.6 245.9      
Beginning period (including reserves)         240.0
Beginning balance at original discount rate 271.0 271.2      
Beginning balance at original discount rate (including reserves)     256.6    
Change in cash flow assumptions     0.0 0.0 4.6
Actual variances from expected experience     (2.0) 0.5 (0.5)
Adjusted balance     269.2 271.5 260.7
Issuances 5.9 11.7 25.2    
Interest accruals 2.8 5.6 10.7    
Net premiums collected (6.9) (13.2) (25.4)    
Ending balance at original discount rate 273.3 273.3 271.2    
Effect of changes in discount rate assumptions (20.1) (20.1) (25.3)    
Ending balance 253.2 253.2 245.9    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 387.9 377.8      
Beginning balance (including reserves)     370.1    
Beginning balance at original discount rate 442.4 442.4 433.2 437.3  
Beginning balance at original discount rate (including reserves)     405.4    
Changes in cash flow assumptions     0.0 0.0 5.6
Actual variances from expected experience     (2.6) 0.6 (1.0)
Adjusted balance     430.6 437.9 410.0
Issuances 5.9 11.8 25.5    
Interest accruals 4.3 8.6 16.1    
Benefit payments (5.7) (8.6) (18.4)    
Ending balance at original discount rate 442.4 442.4 433.2    
Effect of changes in discount rate assumptions (48.2) (48.2) (55.4)    
Ending balance 394.2 394.2 377.8    
Net liability for future policy benefits 141.0 141.0 131.8    
Less: Reinsurance recoverable (20.4) (20.4) (19.3)    
Net liability for future policy benefits, after reinsurance recoverable 120.6 120.6 112.5    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits 120.6 120.6 112.5    
Experience life          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 64.9 66.6      
Beginning period (including reserves)         71.7
Beginning balance at original discount rate 63.1 65.4      
Beginning balance at original discount rate (including reserves)     67.0    
Change in cash flow assumptions     0.0 0.0 1.5
Actual variances from expected experience     1.6 3.2 0.0
Adjusted balance     67.0 66.3 68.5
Issuances 0.0 0.0 0.0    
Interest accruals 0.9 1.8 3.7    
Net premiums collected (1.8) (3.4) (6.8)    
Ending balance at original discount rate 65.4 65.4 65.4    
Effect of changes in discount rate assumptions 2.2 2.2 1.2    
Ending balance 67.6 67.6 66.6    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 814.8 813.2      
Beginning balance (including reserves)     883.0    
Beginning balance at original discount rate 771.8 771.8 782.8 776.3  
Beginning balance at original discount rate (including reserves)     797.5    
Changes in cash flow assumptions     0.0 0.0 2.2
Actual variances from expected experience     3.2 5.4 0.2
Adjusted balance     786.0 781.7 799.9
Issuances 0.0 0.0 0.0    
Interest accruals 11.5 23.0 46.7    
Benefit payments (21.4) (37.2) (63.8)    
Ending balance at original discount rate 771.8 771.8 782.8    
Effect of changes in discount rate assumptions 38.9 38.9 30.4    
Ending balance 810.7 810.7 813.2    
Net liability for future policy benefits 743.1 743.1 746.6    
Less: Reinsurance recoverable (0.8) (0.8) (0.9)    
Net liability for future policy benefits, after reinsurance recoverable 742.3 742.3 745.7    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits 742.3 742.3 745.7    
Limited-Pay Whole Life          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 34.0 34.2      
Beginning period (including reserves)         32.2
Beginning balance at original discount rate 36.2 36.8      
Beginning balance at original discount rate (including reserves)     33.9    
Change in cash flow assumptions     0.0 0.0 2.2
Actual variances from expected experience     (0.2) 0.1 0.0
Adjusted balance     36.6 36.3 36.1
Issuances 0.5 1.0 4.0    
Interest accruals 0.3 0.7 1.4    
Net premiums collected (1.0) (2.2) (4.7)    
Ending balance at original discount rate 36.1 36.1 36.8    
Effect of changes in discount rate assumptions (1.9) (1.9) (2.6)    
Ending balance 34.2 34.2 34.2    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 87.7 86.2      
Beginning balance (including reserves)     89.6    
Beginning balance at original discount rate 116.4 116.4 114.3 115.1  
Beginning balance at original discount rate (including reserves)     105.6    
Changes in cash flow assumptions     0.0 0.0 2.4
Actual variances from expected experience     (0.1) 0.3 0.0
Adjusted balance     114.2 115.4 108.0
Issuances 0.5 1.0 4.0    
Interest accruals 1.1 2.2 4.2    
Benefit payments (0.6) (1.0) (1.9)    
Ending balance at original discount rate 116.4 116.4 114.3    
Effect of changes in discount rate assumptions (27.6) (27.6) (28.1)    
Ending balance 88.8 88.8 86.2    
Net liability for future policy benefits 54.6 54.6 52.1    
Less: Reinsurance recoverable (1.5) (1.5) (1.4)    
Net liability for future policy benefits, after reinsurance recoverable 53.1 53.1 50.7    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits 53.1 53.1 50.7    
Supplemental health          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 182.6 179.9      
Beginning period (including reserves)         182.0
Beginning balance at original discount rate 214.6 214.6      
Beginning balance at original discount rate (including reserves)     213.4    
Change in cash flow assumptions     0.0 0.0 (5.2)
Actual variances from expected experience     (1.5) 0.0 2.9
Adjusted balance     213.1 214.6 211.1
Issuances 6.6 12.7 20.9    
Interest accruals 1.8 3.5 6.8    
Net premiums collected (6.4) (12.7) (24.2)    
Ending balance at original discount rate 216.6 216.6 214.6    
Effect of changes in discount rate assumptions (30.4) (30.4) (34.7)    
Ending balance 186.2 186.2 179.9    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 385.6 383.4      
Beginning balance (including reserves)     427.6    
Beginning balance at original discount rate 476.8 476.8 482.8 480.1  
Beginning balance at original discount rate (including reserves)     517.9    
Changes in cash flow assumptions     0.0 0.0 (6.5)
Actual variances from expected experience     (3.1) (1.0) 2.5
Adjusted balance     479.7 479.1 513.9
Issuances 6.6 12.7 20.9    
Interest accruals 3.5 7.0 14.4    
Benefit payments (12.4) (22.6) (66.4)    
Ending balance at original discount rate 476.8 476.8 482.8    
Effect of changes in discount rate assumptions (92.1) (92.1) (99.4)    
Ending balance 384.7 384.7 383.4    
Net liability for future policy benefits 198.5 198.5 203.5    
Less: Reinsurance recoverable (4.2) (4.2) (4.7)    
Net liability for future policy benefits, after reinsurance recoverable 194.3 194.3 198.8    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits 194.3 194.3 198.8    
Cancer          
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Net liability for future policy benefits 69.4 69.4 72.2    
Accident          
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Net liability for future policy benefits 18.6 18.6 18.8    
Disability          
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Net liability for future policy benefits 22.1 22.1 21.4    
Other          
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Net liability for future policy benefits 84.2 84.2 86.4    
SPIA (life contingent)          
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]          
Beginning balance 0.0 0.0      
Beginning period (including reserves)         0.0
Beginning balance at original discount rate 0.0 0.0      
Beginning balance at original discount rate (including reserves)     0.0    
Change in cash flow assumptions     0.0 0.0 0.0
Actual variances from expected experience     0.0 0.0 0.0
Adjusted balance     0.0 0.0 0.0
Issuances 0.7 1.3 2.8    
Interest accruals 0.0 0.0 0.0    
Net premiums collected (0.7) (1.3) (2.8)    
Ending balance at original discount rate 0.0 0.0 0.0    
Effect of changes in discount rate assumptions 0.0 0.0 0.0    
Ending balance 0.0 0.0 0.0    
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]          
Beginning balance 97.2 97.3      
Beginning balance (including reserves)     104.2    
Beginning balance at original discount rate 105.2 105.2 107.3 106.0  
Beginning balance at original discount rate (including reserves)     111.4    
Changes in cash flow assumptions     0.0 0.0 0.0
Actual variances from expected experience     0.0 0.2 0.2
Adjusted balance     107.3 $ 106.2 $ 111.6
Issuances 0.7 1.3 2.8    
Interest accruals 1.1 2.1 4.3    
Benefit payments (2.8) (5.5) (11.4)    
Ending balance at original discount rate 105.2 105.2 107.3    
Effect of changes in discount rate assumptions (8.1) (8.1) (10.0)    
Ending balance 97.1 97.1 97.3    
Net liability for future policy benefits 97.1 97.1 97.3    
Less: Reinsurance recoverable (3.7) (3.7) (3.5)    
Net liability for future policy benefits, after reinsurance recoverable 93.4 93.4 93.8    
Impact of flooring on net liability for future policy benefits 0.0 0.0 0.0    
Net liability for future policy benefits $ 93.4 $ 93.4 $ 93.8