v3.25.4
Shares and Stockholders' Equity - Components and Changes in AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year $ 10,512 $ 10,507  
Balance as of end-of-year 11,986 10,512 $ 10,507
Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year (3,655) (3,532) (8,526)
Income tax benefit (expense) (303) 64 (650)
Reclassification adjustment for gains (losses) included in net income (loss) (58) (173) (3,425)
Income tax benefit (expense) 12 36 719
Balance as of end-of-year (2,482) (3,655) (3,532)
Unrealized holding gains (losses)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 1,827 (1,294) 2,122
Change in foreign currency exchange rate adjustment      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 417 (219) 178
Change in future contract benefits and policyholder account balances, net of reinsurance      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year (814) 1,189 638
Unrealized Gain (Loss) on Derivative Instruments      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year 402 249 301
Income tax benefit (expense) 40 (54) 2
Reclassification adjustment for gains (losses) included in net income (loss) 54 64 60
Income tax benefit (expense) (11) (13) (13)
Balance as of end-of-year 213 402 249
Unrealized holding gains (losses)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 225 38 162
Change in foreign currency exchange rate adjustment      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year (411) 220 (169)
Market Risk Benefit Non-Performance Risk Gain (Loss)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year 145 1,069 1,739
Changes arising during the year (517) (1,175) (854)
Income tax benefit (expense) 111 251 184
Balance as of end-of-year (261) 145 1,069
Policyholder Liability Discount Rate Remeasurement Gain (Loss)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year 795 645 790
Changes arising during the year (261) 189 (187)
Income tax benefit (expense) 55 (39) 42
Balance as of end-of-year 589 795 645
Funded Status of Employee Benefit Plans      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Balance as of beginning-of-year (17) (16) (17)
Changes arising during the year 4 (1) 1
Income tax benefit (expense) (1) 0 0
Balance as of end-of-year $ (14) $ (17) $ (16)