v3.26.3
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 3,383 $ 3,326 $ 3,401 $ 3,191
Other comprehensive income (loss) before reclassifications (32) 4 (45) 34
Ending balance 3,391 3,378 3,391 3,378
Unrealized Gains (Losses) Available-for-Sale Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (51) (57) (41) (81)
Other comprehensive income (loss) before reclassifications (36) 14 (46) 38
Ending balance (87) (43) (87) (43)
Retirement Plan Liabilities Adjustments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (2) (3) (2) (3)
Other comprehensive income (loss) before reclassifications 0 0 0 0
Ending balance (2) (3) (2) (3)
Foreign Currency Translation Adjustments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (10) (6) (7) (13)
Other comprehensive income (loss) before reclassifications (1) (3) (4) 4
Ending balance (11) (9) (11) (9)
Changes in Discount Rate for Insurance Claims and Policyholder Liabilities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (1) 0 (3) (1)
Other comprehensive income (loss) before reclassifications 6 (6) 8 (5)
Ending balance 5 (6) 5 (6)
Other        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 10 15 12 17
Other comprehensive income (loss) before reclassifications (1) (1) (3) (3)
Ending balance 9 14 9 14
Total Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (54) (51) (41) (81)
Ending balance $ (86) $ (47) $ (86) $ (47)