v3.26.1
SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period $ 29,490 $ 26,098
Other comprehensive income (loss), net of tax 449 1,119
Balance, end of period 29,961 26,338
Unrealized Foreign Currency Translation Gains (Losses)    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period (4,847) (4,998)
Other comprehensive income (loss) before reclassifications net of tax (114) 449
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss), net of tax (114) 449
Balance, end of period (4,961) (4,549)
Unrealized Gains (Losses) on Fixed Maturity Securities    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period (1,809) 24
Other comprehensive income (loss) before reclassifications net of tax (867) (1,225)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 11 (32)
Other comprehensive income (loss), net of tax (856) (1,257)
Balance, end of period (2,665) (1,233)
Unrealized Gains (Losses) on Derivatives    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period (13) (20)
Other comprehensive income (loss) before reclassifications net of tax 0 1
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (3) 1
Other comprehensive income (loss), net of tax (3) 2
Balance, end of period (16) (18)
Effect of Changes in Discount Rate Assumptions    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period 8,035 2,006
Other comprehensive income (loss) before reclassifications net of tax 1,423 1,893
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss), net of tax 1,423 1,893
Balance, end of period 9,458 3,899
Pension Liability Adjustment    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period 86 10
Other comprehensive income (loss) before reclassifications net of tax (1) 33
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 (1)
Other comprehensive income (loss), net of tax (1) 32
Balance, end of period 85 42
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income [Roll Forward]    
Balance, beginning of period 1,452 (2,978)
Other comprehensive income (loss) before reclassifications net of tax 441 1,151
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 8 (32)
Other comprehensive income (loss), net of tax 449 1,119
Balance, end of period $ 1,901 $ (1,859)