v3.26.1
Shareholders' Equity - Changes in AOCI Components (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 6,549 $ 5,228
OCI before reclassifications (311) 393
Amounts reclassified from AOCI (2) (4)
Total other comprehensive income (loss), net of tax (313) 389
Ending balance 6,212 5,426
Total AOCI    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (892) (1,908)
Total other comprehensive income (loss), net of tax (313) 389
Ending balance (1,205) (1,519)
Net unrealized gains (losses) on securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (508) (1,452)
OCI before reclassifications (380) 378
Amounts reclassified from AOCI (2) (4)
Total other comprehensive income (loss), net of tax (382) 374
Ending balance (890) (1,078)
Net unrealized gains (losses) on derivatives    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (4) 5
OCI before reclassifications 0 (8)
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax 0 (8)
Ending balance (4) (3)
Effect of changes in discount rate assumptions on certain long-duration contracts    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (45) 27
OCI before reclassifications 65 (30)
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax 65 (30)
Ending balance 20 (3)
Effect of changes in instrument-specific credit risk on MRBs    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (127) (147)
OCI before reclassifications 30 1
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax 30 1
Ending balance (97) (146)
Defined benefit plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (31) (45)
OCI before reclassifications 0 0
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax 0 0
Ending balance (31) (45)
Foreign currency translation    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (177) (295)
OCI before reclassifications (26) 52
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax (26) 52
Ending balance (203) (243)
Other    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 0 (1)
OCI before reclassifications 0 0
Amounts reclassified from AOCI 0 0
Total other comprehensive income (loss), net of tax 0 0
Ending balance $ 0 $ (1)