v3.26.1
Investments - Investments - Unrealized Losses on AFS Securities (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions 3,266  
Percentage of Gross Unrealized Losses Depressed Less than Twenty Percent of Cost or Amortized Cost 95.00%  
ABS    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 1,763 $ 405
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 17 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 202 339
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 13 14
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 1,965 744
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 30 16
Collateralized Loan Obligations [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 649 496
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 3 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 649 496
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 3 1
CMBS    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 86 119
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,412 1,852
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 141 147
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 1,498 1,971
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 141 150
Corporate    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 6,936 2,372
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 110 34
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 6,347 7,089
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 623 570
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 13,283 9,461
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 733 604
Foreign Govt./Govt. Agencies    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 186 39
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 2 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 23 38
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 3 2
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 209 77
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 5 2
Municipal    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 703 407
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,842 2,286
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 211 261
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 2,545 2,693
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 223 268
RMBS    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 1,864 256
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 20 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,993 2,626
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 243 243
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 3,857 2,882
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 263 244
U.S. Treasuries    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 980 592
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 10 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 595 563
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 137 128
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 1,575 1,155
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total 147 139
Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 13,167 4,686
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 174 59
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 12,414 14,793
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 1,371 1,365
Debt Securities, Available-for-sale, Unrealized Loss Position, Total 25,581 19,479
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total $ 1,545 $ 1,424