Fair Value Measurements (excluding Consolidated Investment Entities) - Level 3 Financial Instruments (Details) - Level 3 - Measured at fair value on a recurring basis - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
| Managed custody guarantees |
|
|
|
|
| Derivatives Rollforward: |
|
|
|
|
| Fair Value, Derivatives, beginning balance |
$ (16)
|
$ (8)
|
|
|
| Gains (losses) from standalone derivatives recognized in Net gains (losses) |
4
|
(2)
|
|
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
|
|
| Purchases |
0
|
0
|
|
|
| Issuances |
(1)
|
0
|
|
|
| Sales |
0
|
0
|
|
|
| Settlements |
0
|
0
|
|
|
| Transfers in to Level 3 |
0
|
0
|
|
|
| Transfers out of Level 3 |
0
|
0
|
|
|
| Fair Value, Derivatives, ending balance |
(13)
|
(10)
|
$ (13)
|
$ (10)
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
|
|
| Embedded derivatives within reinsurance |
|
|
|
|
| Derivatives Rollforward: |
|
|
|
|
| Fair Value, Derivatives, beginning balance |
(52)
|
(57)
|
(53)
|
(58)
|
| Gains (losses) from standalone derivatives recognized in Net gains (losses) |
10
|
0
|
11
|
1
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
0
|
0
|
0
|
0
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Settlements |
0
|
0
|
0
|
0
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Derivatives, ending balance |
(42)
|
(57)
|
(42)
|
(57)
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Short-term investments and cash equivalents |
|
|
|
|
| Derivatives Rollforward: |
|
|
|
|
| Fair Value, Derivatives, beginning balance |
24
|
|
23
|
|
| Gains (losses) from standalone derivatives recognized in Net gains (losses) |
0
|
|
0
|
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
1
|
|
2
|
|
| Purchases |
0
|
|
0
|
|
| Issuances |
0
|
|
0
|
|
| Sales |
0
|
|
0
|
|
| Settlements |
0
|
|
0
|
|
| Transfers in to Level 3 |
0
|
|
0
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
| Fair Value, Derivatives, ending balance |
25
|
|
25
|
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
|
0
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
1
|
|
2
|
|
| Fixed maturities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
2,463
|
2,029
|
2,127
|
2,090
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
(30)
|
(3)
|
(53)
|
(4)
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
36
|
(13)
|
85
|
(32)
|
| Purchases |
264
|
111
|
627
|
174
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
(13)
|
(38)
|
(22)
|
(44)
|
| Settlements |
(109)
|
(54)
|
(138)
|
(169)
|
| Transfers in to Level 3 |
2
|
0
|
0
|
51
|
| Transfers out of Level 3 |
0
|
(22)
|
(13)
|
(56)
|
| Fair Value, Assets, ending balance |
2,613
|
2,010
|
2,613
|
2,010
|
| Change In Unrealized Gains (Losses) Included in Earnings |
1
|
(3)
|
(20)
|
(4)
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
33
|
(13)
|
81
|
(37)
|
| US Government Agencies Debt Securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
|
1
|
|
1
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
|
|
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
|
0
|
| Purchases |
|
|
|
0
|
| Issuances |
|
|
|
0
|
| Sales |
|
|
|
0
|
| Settlements |
|
|
|
0
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
(1)
|
|
(1)
|
| Fair Value, Assets, ending balance |
|
0
|
|
0
|
| Change In Unrealized Gains (Losses) Included in Earnings |
|
|
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
|
0
|
|
0
|
| U.S. corporate public securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
48
|
18
|
59
|
18
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
0
|
0
|
(1)
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
1
|
2
|
1
|
| Purchases |
0
|
0
|
1
|
0
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
(11)
|
0
|
| Settlements |
0
|
(7)
|
0
|
(7)
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
(2)
|
0
|
| Fair Value, Assets, ending balance |
48
|
12
|
48
|
12
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
1
|
0
|
| U.S. corporate private securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
1,677
|
1,455
|
1,497
|
1,526
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
2
|
0
|
1
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
16
|
(7)
|
35
|
(22)
|
| Purchases |
87
|
74
|
271
|
136
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
(13)
|
(18)
|
(11)
|
(23)
|
| Settlements |
(94)
|
(37)
|
(118)
|
(115)
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
(3)
|
0
|
(38)
|
| Fair Value, Assets, ending balance |
1,675
|
1,464
|
1,675
|
1,464
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
1
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
13
|
(6)
|
32
|
(26)
|
| Foreign corporate public securities and foreign governments |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
59
|
0
|
60
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
0
|
0
|
0
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
(1)
|
0
|
| Purchases |
3
|
17
|
3
|
17
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Settlements |
0
|
0
|
0
|
0
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Assets, ending balance |
62
|
17
|
62
|
17
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
(1)
|
0
|
| Foreign corporate private securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
590
|
448
|
421
|
436
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
(32)
|
0
|
(50)
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
20
|
(7)
|
49
|
(11)
|
| Purchases |
72
|
20
|
232
|
21
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
(9)
|
0
|
(9)
|
| Settlements |
(14)
|
(8)
|
(16)
|
(44)
|
| Transfers in to Level 3 |
0
|
0
|
0
|
51
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Assets, ending balance |
636
|
444
|
636
|
444
|
| Change In Unrealized Gains (Losses) Included in Earnings |
1
|
0
|
(18)
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
20
|
(7)
|
49
|
(11)
|
| Residential mortgage-backed securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
70
|
52
|
67
|
57
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
0
|
(3)
|
(3)
|
(4)
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
28
|
0
|
43
|
0
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Settlements |
0
|
0
|
0
|
0
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
(9)
|
(4)
|
| Fair Value, Assets, ending balance |
98
|
49
|
98
|
49
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
(3)
|
(3)
|
(4)
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Other asset-backed securities |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
19
|
55
|
23
|
52
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
0
|
0
|
0
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
74
|
0
|
77
|
0
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
(11)
|
0
|
(12)
|
| Settlements |
(1)
|
(2)
|
(4)
|
(3)
|
| Transfers in to Level 3 |
2
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
(18)
|
(2)
|
(13)
|
| Fair Value, Assets, ending balance |
94
|
24
|
94
|
24
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Equity securities, at fair value |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
110
|
99
|
98
|
96
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
(1)
|
(1)
|
2
|
2
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
0
|
0
|
9
|
0
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
(14)
|
0
|
(14)
|
0
|
| Settlements |
0
|
0
|
0
|
0
|
| Transfers in to Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Assets, ending balance |
95
|
98
|
95
|
98
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
(1)
|
2
|
2
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Contingent Consideration |
|
|
|
|
| Liabilities Rollforward: |
|
|
|
|
| Fair Value, Liabilities, Ending Balance |
(152)
|
(48)
|
(2)
|
(51)
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
(2)
|
(1)
|
(4)
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
0
|
0
|
0
|
0
|
| Issuances |
0
|
0
|
(149)
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Settlements |
0
|
0
|
1
|
2
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Liabilities, Ending Balance |
(154)
|
(49)
|
(154)
|
(49)
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Managed custody guarantees |
|
|
|
|
| Liabilities Rollforward: |
|
|
|
|
| Fair Value, Liabilities, Ending Balance |
|
|
(19)
|
(9)
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
|
|
7
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
0
|
0
|
| Purchases |
|
|
0
|
0
|
| Issuances |
|
|
(1)
|
(1)
|
| Sales |
|
|
0
|
0
|
| Settlements |
|
|
0
|
0
|
| Transfers into Level 3 |
|
|
0
|
0
|
| Transfers out of Level 3 |
|
|
0
|
0
|
| Fair Value, Liabilities, Ending Balance |
(13)
|
(10)
|
(13)
|
(10)
|
| Change In Unrealized Gains (Losses) Included in Earnings |
|
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
|
|
0
|
0
|
| Assets held in separate accounts |
|
|
|
|
| Assets Rollforward: |
|
|
|
|
| Fair Value, Assets, beginning balance |
338
|
360
|
340
|
348
|
| Total Realized/Unrealized Gains (Losses) Included in Net income |
2
|
1
|
6
|
1
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
13
|
19
|
21
|
35
|
| Issuances |
0
|
0
|
0
|
0
|
| Sales |
(3)
|
(12)
|
(17)
|
(15)
|
| Settlements |
0
|
0
|
0
|
0
|
| Transfers in to Level 3 |
0
|
0
|
0
|
5
|
| Transfers out of Level 3 |
(3)
|
(5)
|
(3)
|
(11)
|
| Fair Value, Assets, ending balance |
347
|
363
|
347
|
363
|
| Change In Unrealized Gains (Losses) Included in Earnings |
0
|
0
|
0
|
0
|
| Derivatives Rollforward: |
|
|
|
|
| Change In Unrealized Gains (Losses) Included in OCI |
$ 0
|
$ 0
|
$ 0
|
$ 0
|