Fair Value Measurements - Gross components of purchases, sales, issuances and settlements (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
| Assets: |
|
|
|
|
| Purchases |
$ 1,849
|
$ 2,767
|
$ 5,860
|
$ 6,943
|
| Sales |
(652)
|
(900)
|
(1,275)
|
(1,782)
|
| Issuances and Settlements |
(680)
|
(2,047)
|
(3,526)
|
(4,488)
|
| Purchases, Sales, Issuances and Settlements, Net |
517
|
(180)
|
1,059
|
673
|
| Liabilities: |
|
|
|
|
| Purchases |
0
|
0
|
0
|
0
|
| Sales |
489
|
625
|
1,338
|
1,483
|
| Issuances and Settlements |
(490)
|
(414)
|
(1,094)
|
(904)
|
| Purchases, Sales, Issuances and Settlements, Net |
(1)
|
211
|
244
|
579
|
| Policyholder contract deposits |
|
|
|
|
| Liabilities: |
|
|
|
|
| Purchases |
0
|
0
|
0
|
0
|
| Sales |
489
|
625
|
1,338
|
1,483
|
| Issuances and Settlements |
(576)
|
(472)
|
(1,183)
|
(934)
|
| Purchases, Sales, Issuances and Settlements, Net |
(87)
|
153
|
155
|
549
|
| Derivative liabilities, net |
|
|
|
|
| Liabilities: |
|
|
|
|
| Purchases |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Issuances and Settlements |
37
|
94
|
166
|
134
|
| Purchases, Sales, Issuances and Settlements, Net |
37
|
94
|
166
|
134
|
| Fortitude Re funds withheld payable |
|
|
|
|
| Liabilities: |
|
|
|
|
| Purchases |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Issuances and Settlements |
49
|
(36)
|
(77)
|
(104)
|
| Purchases, Sales, Issuances and Settlements, Net |
49
|
(36)
|
(77)
|
(104)
|
| Bonds available-for-sale |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
1,716
|
2,702
|
5,636
|
6,600
|
| Sales |
(652)
|
(899)
|
(1,238)
|
(1,726)
|
| Issuances and Settlements |
(551)
|
(1,852)
|
(3,233)
|
(4,038)
|
| Purchases, Sales, Issuances and Settlements, Net |
513
|
(49)
|
1,165
|
836
|
| Bonds available-for-sale | Obligations of states, municipalities and political subdivisions |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
29
|
15
|
64
|
| Sales |
0
|
(29)
|
(23)
|
(67)
|
| Issuances and Settlements |
0
|
0
|
(2)
|
(1)
|
| Purchases, Sales, Issuances and Settlements, Net |
0
|
0
|
(10)
|
(4)
|
| Bonds available-for-sale | Corporate debt |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
131
|
92
|
458
|
466
|
| Sales |
(39)
|
(1)
|
(41)
|
(107)
|
| Issuances and Settlements |
(43)
|
(32)
|
(413)
|
(230)
|
| Purchases, Sales, Issuances and Settlements, Net |
49
|
59
|
4
|
129
|
| Bonds available-for-sale | RMBS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
509
|
105
|
986
|
384
|
| Sales |
(193)
|
(2)
|
(284)
|
(62)
|
| Issuances and Settlements |
(76)
|
(183)
|
(456)
|
(551)
|
| Purchases, Sales, Issuances and Settlements, Net |
240
|
(80)
|
246
|
(229)
|
| Bonds available-for-sale | CMBS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
0
|
49
|
12
|
| Sales |
(10)
|
(11)
|
(50)
|
(30)
|
| Issuances and Settlements |
0
|
(103)
|
(86)
|
(116)
|
| Purchases, Sales, Issuances and Settlements, Net |
(10)
|
(114)
|
(87)
|
(134)
|
| Bonds available-for-sale | CLO |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
83
|
292
|
599
|
618
|
| Sales |
(4)
|
0
|
(7)
|
0
|
| Issuances and Settlements |
(54)
|
(64)
|
(202)
|
(328)
|
| Purchases, Sales, Issuances and Settlements, Net |
25
|
228
|
390
|
290
|
| Bonds available-for-sale | ABS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
993
|
2,184
|
3,529
|
5,056
|
| Sales |
(406)
|
(856)
|
(833)
|
(1,460)
|
| Issuances and Settlements |
(378)
|
(1,470)
|
(2,074)
|
(2,812)
|
| Purchases, Sales, Issuances and Settlements, Net |
209
|
(142)
|
622
|
784
|
| Other bond securities |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
128
|
12
|
197
|
130
|
| Sales |
0
|
(1)
|
(37)
|
(56)
|
| Issuances and Settlements |
(24)
|
(36)
|
(146)
|
(124)
|
| Purchases, Sales, Issuances and Settlements, Net |
104
|
(25)
|
14
|
(50)
|
| Other bond securities | Obligations of states, municipalities and political subdivisions |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
0
|
|
|
| Sales |
0
|
0
|
|
|
| Issuances and Settlements |
0
|
0
|
|
|
| Purchases, Sales, Issuances and Settlements, Net |
0
|
0
|
0
|
0
|
| Other bond securities | Corporate debt |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
1
|
0
|
17
|
10
|
| Sales |
0
|
0
|
0
|
(12)
|
| Issuances and Settlements |
(14)
|
0
|
(24)
|
(12)
|
| Purchases, Sales, Issuances and Settlements, Net |
(13)
|
0
|
(7)
|
(14)
|
| Other bond securities | RMBS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
1
|
3
|
26
|
| Sales |
0
|
(1)
|
0
|
(26)
|
| Issuances and Settlements |
0
|
(2)
|
(2)
|
(7)
|
| Purchases, Sales, Issuances and Settlements, Net |
0
|
(2)
|
1
|
(7)
|
| Other bond securities | CMBS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
0
|
0
|
1
|
| Sales |
0
|
0
|
0
|
(1)
|
| Issuances and Settlements |
0
|
0
|
(10)
|
0
|
| Purchases, Sales, Issuances and Settlements, Net |
0
|
0
|
(10)
|
0
|
| Other bond securities | CLO |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
9
|
5
|
9
|
11
|
| Sales |
0
|
0
|
0
|
0
|
| Issuances and Settlements |
0
|
(2)
|
0
|
(4)
|
| Purchases, Sales, Issuances and Settlements, Net |
9
|
3
|
9
|
7
|
| Other bond securities | ABS |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
118
|
6
|
168
|
82
|
| Sales |
0
|
0
|
(37)
|
(17)
|
| Issuances and Settlements |
(10)
|
(32)
|
(110)
|
(101)
|
| Purchases, Sales, Issuances and Settlements, Net |
108
|
(26)
|
21
|
(36)
|
| Equity securities |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
0
|
1
|
0
|
1
|
| Sales |
0
|
0
|
0
|
0
|
| Issuances and Settlements |
0
|
0
|
(6)
|
0
|
| Purchases, Sales, Issuances and Settlements, Net |
0
|
1
|
(6)
|
1
|
| Other invested assets |
|
|
|
|
| Assets: |
|
|
|
|
| Purchases |
5
|
52
|
27
|
212
|
| Sales |
0
|
0
|
0
|
0
|
| Issuances and Settlements |
(105)
|
(159)
|
(141)
|
(326)
|
| Purchases, Sales, Issuances and Settlements, Net |
$ (100)
|
$ (107)
|
$ (114)
|
$ (114)
|