v3.25.4
Derivative Instruments - Change in Our Unrealized Gain on Derivative Instruments 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 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 Gain (Loss) on Derivative Instruments | Interest rate contracts | Net Investment Income      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) 0 (3) (1)
Unrealized Gain (Loss) on Derivative Instruments | Foreign currency contracts | Net Investment Income      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) 57 59 54
Unrealized Gain (Loss) on Derivative Instruments | Foreign currency contracts | Realized Gain (Loss)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Reclassification adjustment for gains (losses) included in net income (loss) (3) 8 7
Unrealized holding gains (losses)      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 225 38 162
Unrealized holding gains (losses) | Interest rate contracts      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 17 17 212
Unrealized holding gains (losses) | Foreign currency contracts      
Change in our unrealized gain on derivative instruments in accumulated OCI      
Changes arising during the year 208 21 (50)
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)