v3.26.1
Investments - Schedule of Gross Unrealized Losses and Fair Value of Corporate Securities Based on Industries (Details)
$ in Millions
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 7,635 $ 2,786
Less than 12 months, gross unrealized losses $ (134) $ (82)
Less than 12 months, number of securities in a continuous loss position | security 1,584 610
12 months or more, fair value $ 21,749 $ 23,303
12 months or more, gross unrealized losses $ (3,370) $ (3,145)
12 months or more, number of securities in a continuous loss position | security 2,883 3,069
Fair value $ 29,384 $ 26,089
Gross unrealized losses $ (3,504) $ (3,227)
Number of securities | security 4,467 3,679
Corporate Debt Securities    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 5,518 $ 1,908
Less than 12 months, gross unrealized losses $ (95) $ (68)
Less than 12 months, number of securities in a continuous loss position | security 1,114 456
12 months or more, fair value $ 16,384 $ 17,552
12 months or more, gross unrealized losses $ (2,331) $ (2,177)
12 months or more, number of securities in a continuous loss position | security 2,150 2,252
Fair value $ 21,902 $ 19,460
Gross unrealized losses $ (2,426) $ (2,245)
Number of securities | security 3,264 2,708
U.S. corporate    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 4,148 $ 1,664
Less than 12 months, gross unrealized losses $ (79) $ (57)
Less than 12 months, number of securities in a continuous loss position | security 883 399
12 months or more, fair value $ 13,224 $ 14,057
12 months or more, gross unrealized losses $ (1,954) $ (1,811)
12 months or more, number of securities in a continuous loss position | security 1,757 1,814
Fair value $ 17,372 $ 15,721
Gross unrealized losses $ (2,033) $ (1,868)
Number of securities | security 2,640 2,213
U.S. corporate | Utilities    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 813 $ 319
Less than 12 months, gross unrealized losses $ (14) $ (8)
Less than 12 months, number of securities in a continuous loss position | security 144 66
12 months or more, fair value $ 1,999 $ 2,109
12 months or more, gross unrealized losses $ (388) $ (367)
12 months or more, number of securities in a continuous loss position | security 304 320
Fair value $ 2,812 $ 2,428
Gross unrealized losses $ (402) $ (375)
Number of securities | security 448 386
U.S. corporate | Energy    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 392 $ 147
Less than 12 months, gross unrealized losses $ (7) $ (5)
Less than 12 months, number of securities in a continuous loss position | security 88 30
12 months or more, fair value $ 964 $ 1,009
12 months or more, gross unrealized losses $ (122) $ (118)
12 months or more, number of securities in a continuous loss position | security 130 134
Fair value $ 1,356 $ 1,156
Gross unrealized losses $ (129) $ (123)
Number of securities | security 218 164
U.S. corporate | Finance and insurance    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 1,045 $ 329
Less than 12 months, gross unrealized losses $ (16) $ (5)
Less than 12 months, number of securities in a continuous loss position | security 247 95
12 months or more, fair value $ 3,882 $ 4,198
12 months or more, gross unrealized losses $ (520) $ (482)
12 months or more, number of securities in a continuous loss position | security 496 514
Fair value $ 4,927 $ 4,527
Gross unrealized losses $ (536) $ (487)
Number of securities | security 743 609
U.S. corporate | Consumer—non-cyclical    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 545 $ 239
Less than 12 months, gross unrealized losses $ (8) $ (3)
Less than 12 months, number of securities in a continuous loss position | security 124 60
12 months or more, fair value $ 2,244 $ 2,368
12 months or more, gross unrealized losses $ (306) $ (276)
12 months or more, number of securities in a continuous loss position | security 260 261
Fair value $ 2,789 $ 2,607
Gross unrealized losses $ (314) $ (279)
Number of securities | security 384 321
U.S. corporate | Technology and communications    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 386 $ 259
Less than 12 months, gross unrealized losses $ (15) $ (16)
Less than 12 months, number of securities in a continuous loss position | security 93 63
12 months or more, fair value $ 1,511 $ 1,573
12 months or more, gross unrealized losses $ (264) $ (240)
12 months or more, number of securities in a continuous loss position | security 189 195
Fair value $ 1,897 $ 1,832
Gross unrealized losses $ (279) $ (256)
Number of securities | security 282 258
U.S. corporate | Industrial    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 113 $ 56
Less than 12 months, gross unrealized losses $ (3) $ (1)
Less than 12 months, number of securities in a continuous loss position | security 25 18
12 months or more, fair value $ 540 $ 575
12 months or more, gross unrealized losses $ (83) $ (82)
12 months or more, number of securities in a continuous loss position | security 80 81
Fair value $ 653 $ 631
Gross unrealized losses $ (86) $ (83)
Number of securities | security 105 99
U.S. corporate | Capital goods    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 395 $ 146
Less than 12 months, gross unrealized losses $ (6) $ (3)
Less than 12 months, number of securities in a continuous loss position | security 77 37
12 months or more, fair value $ 900 $ 983
12 months or more, gross unrealized losses $ (111) $ (102)
12 months or more, number of securities in a continuous loss position | security 117 128
Fair value $ 1,295 $ 1,129
Gross unrealized losses $ (117) $ (105)
Number of securities | security 194 165
U.S. corporate | Consumer—cyclical    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 206 $ 0
Less than 12 months, gross unrealized losses $ (2) $ 0
Less than 12 months, number of securities in a continuous loss position | security 43 0
12 months or more, fair value $ 633 $ 715
12 months or more, gross unrealized losses $ (75) $ (69)
12 months or more, number of securities in a continuous loss position | security 97 103
Fair value $ 839 $ 715
Gross unrealized losses $ (77) $ (69)
Number of securities | security 140 103
U.S. corporate | Transportation    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 208 $ 130
Less than 12 months, gross unrealized losses $ (7) $ (10)
Less than 12 months, number of securities in a continuous loss position | security 36 24
12 months or more, fair value $ 444 $ 449
12 months or more, gross unrealized losses $ (72) $ (67)
12 months or more, number of securities in a continuous loss position | security 69 67
Fair value $ 652 $ 579
Gross unrealized losses $ (79) $ (77)
Number of securities | security 105 91
U.S. corporate | Other    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 45 $ 39
Less than 12 months, gross unrealized losses $ (1) $ (6)
Less than 12 months, number of securities in a continuous loss position | security 6 6
12 months or more, fair value $ 107 $ 78
12 months or more, gross unrealized losses $ (13) $ (8)
12 months or more, number of securities in a continuous loss position | security 15 11
Fair value $ 152 $ 117
Gross unrealized losses $ (14) $ (14)
Number of securities | security 21 17
Non-U.S. corporate    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 1,370 $ 244
Less than 12 months, gross unrealized losses $ (16) $ (11)
Less than 12 months, number of securities in a continuous loss position | security 231 57
12 months or more, fair value $ 3,160 $ 3,495
12 months or more, gross unrealized losses $ (377) $ (366)
12 months or more, number of securities in a continuous loss position | security 393 438
Fair value $ 4,530 $ 3,739
Gross unrealized losses $ (393) $ (377)
Number of securities | security 624 495
Non-U.S. corporate | Utilities    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 152 $ 0
Less than 12 months, gross unrealized losses $ (1) $ 0
Less than 12 months, number of securities in a continuous loss position | security 20 0
12 months or more, fair value $ 349 $ 386
12 months or more, gross unrealized losses $ (34) $ (36)
12 months or more, number of securities in a continuous loss position | security 40 43
Fair value $ 501 $ 386
Gross unrealized losses $ (35) $ (36)
Number of securities | security 60 43
Non-U.S. corporate | Energy    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 171 $ 78
Less than 12 months, gross unrealized losses $ (2) $ (6)
Less than 12 months, number of securities in a continuous loss position | security 26 16
12 months or more, fair value $ 323 $ 358
12 months or more, gross unrealized losses $ (33) $ (30)
12 months or more, number of securities in a continuous loss position | security 35 49
Fair value $ 494 $ 436
Gross unrealized losses $ (35) $ (36)
Number of securities | security 61 65
Non-U.S. corporate | Finance and insurance    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 361 $ 85
Less than 12 months, gross unrealized losses $ (4) $ (1)
Less than 12 months, number of securities in a continuous loss position | security 67 14
12 months or more, fair value $ 704 $ 800
12 months or more, gross unrealized losses $ (79) $ (74)
12 months or more, number of securities in a continuous loss position | security 93 109
Fair value $ 1,065 $ 885
Gross unrealized losses $ (83) $ (75)
Number of securities | security 160 123
Non-U.S. corporate | Consumer—non-cyclical    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 55 $ 0
Less than 12 months, gross unrealized losses $ (1) $ 0
Less than 12 months, number of securities in a continuous loss position | security 19 0
12 months or more, fair value $ 375 $ 390
12 months or more, gross unrealized losses $ (64) $ (64)
12 months or more, number of securities in a continuous loss position | security 42 43
Fair value $ 430 $ 390
Gross unrealized losses $ (65) $ (64)
Number of securities | security 61 43
Non-U.S. corporate | Technology and communications    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 122 $ 29
Less than 12 months, gross unrealized losses $ (2) $ (2)
Less than 12 months, number of securities in a continuous loss position | security 23 13
12 months or more, fair value $ 401 $ 435
12 months or more, gross unrealized losses $ (64) $ (61)
12 months or more, number of securities in a continuous loss position | security 45 48
Fair value $ 523 $ 464
Gross unrealized losses $ (66) $ (63)
Number of securities | security 68 61
Non-U.S. corporate | Industrial    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 144 $ 18
Less than 12 months, gross unrealized losses $ (1) $ (1)
Less than 12 months, number of securities in a continuous loss position | security 22 10
12 months or more, fair value $ 208 $ 259
12 months or more, gross unrealized losses $ (25) $ (26)
12 months or more, number of securities in a continuous loss position | security 31 35
Fair value $ 352 $ 277
Gross unrealized losses $ (26) $ (27)
Number of securities | security 53 45
Non-U.S. corporate | Capital goods    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 124 $ 0
Less than 12 months, gross unrealized losses $ (1) $ 0
Less than 12 months, number of securities in a continuous loss position | security 22 0
12 months or more, fair value $ 328 $ 332
12 months or more, gross unrealized losses $ (31) $ (29)
12 months or more, number of securities in a continuous loss position | security 45 42
Fair value $ 452 $ 332
Gross unrealized losses $ (32) $ (29)
Number of securities | security 67 42
Non-U.S. corporate | Consumer—cyclical    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 88 $ 0
Less than 12 months, gross unrealized losses $ (1) $ 0
Less than 12 months, number of securities in a continuous loss position | security 9 0
12 months or more, fair value $ 90 $ 130
12 months or more, gross unrealized losses $ (9) $ (8)
12 months or more, number of securities in a continuous loss position | security 12 15
Fair value $ 178 $ 130
Gross unrealized losses $ (10) $ (8)
Number of securities | security 21 15
Non-U.S. corporate | Transportation    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 96 $ 34
Less than 12 months, gross unrealized losses $ (2) $ (1)
Less than 12 months, number of securities in a continuous loss position | security 11 4
12 months or more, fair value $ 218 $ 229
12 months or more, gross unrealized losses $ (21) $ (20)
12 months or more, number of securities in a continuous loss position | security 26 29
Fair value $ 314 $ 263
Gross unrealized losses $ (23) $ (21)
Number of securities | security 37 33
Non-U.S. corporate | Other    
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]    
Less than 12 months, fair value $ 57 $ 0
Less than 12 months, gross unrealized losses $ (1) $ 0
Less than 12 months, number of securities in a continuous loss position | security 12 0
12 months or more, fair value $ 164 $ 176
12 months or more, gross unrealized losses $ (17) $ (18)
12 months or more, number of securities in a continuous loss position | security 24 25
Fair value $ 221 $ 176
Gross unrealized losses $ (18) $ (18)
Number of securities | security 36 25