v3.26.1
Shareholders' Equity - Changes in AOCI Components (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 6,212 $ 5,426 $ 6,549 $ 5,228
OCI before reclassifications (78) 271 (389) 664
Amounts reclassified from AOCI 7 12 5 8
Total other comprehensive income (loss), net of tax (71) 283 (384) 672
Ending balance 6,366 6,082 6,366 6,082
Total AOCI        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (1,205) (1,519) (892) (1,908)
Total other comprehensive income (loss), net of tax (71) 283 (384) 672
Ending balance (1,276) (1,236) (1,276) (1,236)
Net unrealized gains (losses) on securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (890) (1,078) (508) (1,452)
OCI before reclassifications (31) 180 (411) 558
Amounts reclassified from AOCI 7 12 5 8
Total other comprehensive income (loss), net of tax (24) 192 (406) 566
Ending balance (914) (886) (914) (886)
Net unrealized gains (losses) on derivatives        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (4) (3) (4) 5
OCI before reclassifications 0 (1) 0 (9)
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax 0 (1) 0 (9)
Ending balance (4) (4) (4) (4)
Effect of changes in discount rate assumptions on certain long-duration contracts        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 20 (3) (45) 27
OCI before reclassifications (5) (12) 60 (42)
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax (5) (12) 60 (42)
Ending balance 15 (15) 15 (15)
Effect of changes in instrument-specific credit risk on MRBs        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (97) (146) (127) (147)
OCI before reclassifications (30) 1 0 2
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax (30) 1 0 2
Ending balance (127) (145) (127) (145)
Defined benefit plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (31) (45) (31) (45)
OCI before reclassifications 0 0 0 0
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax 0 0 0 0
Ending balance (31) (45) (31) (45)
Foreign currency translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (203) (243) (177) (295)
OCI before reclassifications (12) 103 (38) 155
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax (12) 103 (38) 155
Ending balance (215) (140) (215) (140)
Other        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 0 (1) 0 (1)
OCI before reclassifications 0 0 0 0
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss), net of tax 0 0 0 0
Ending balance $ 0 $ (1) $ 0 $ (1)