Fair Value Measurements - Level 3 Financial Instruments (Details) - Assets measured on recurring basis - Level 3 - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
| Stabilizer (Investment Only) and MCG Contracts |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, Derivatives, beginning balance |
$ (16)
|
$ (8)
|
$ (19)
|
$ (9)
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
4
|
(2)
|
7
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
0
|
0
|
0
|
0
|
| Purchases |
0
|
0
|
0
|
0
|
| Issues |
(1)
|
0
|
(1)
|
(1)
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales |
0
|
0
|
0
|
0
|
| Settlements |
0
|
0
|
0
|
0
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers, Net |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Fair Value, Derivatives, ending balance |
(13)
|
(10)
|
(13)
|
(10)
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Change in Unrealized Gain (Loss) |
0
|
0
|
0
|
0
|
| Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
0
|
0
|
| U.S. corporate public securities | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
38
|
14
|
47
|
13
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
|
|
(1)
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
1
|
|
2
|
1
|
| Purchases |
|
|
1
|
0
|
| Issuances |
|
|
|
0
|
| Sales |
|
|
(10)
|
0
|
| Settlements |
|
(5)
|
|
(5)
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
|
|
0
|
| Fair Value, assets, ending balance |
39
|
9
|
39
|
9
|
| Change in Unrealized Gains (Losses) Included in Earnings |
|
|
|
0
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
1
|
0
|
| U.S. corporate private securities | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
1,316
|
1,126
|
1,171
|
1,185
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
2
|
|
1
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
14
|
(4)
|
29
|
(17)
|
| Purchases |
90
|
52
|
240
|
107
|
| Issuances |
|
|
|
0
|
| Sales |
(23)
|
|
(20)
|
(9)
|
| Settlements |
(82)
|
(30)
|
(104)
|
(96)
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
|
|
(26)
|
| Fair Value, assets, ending balance |
1,317
|
1,144
|
1,317
|
1,144
|
| Change in Unrealized Gains (Losses) Included in Earnings |
|
|
|
0
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
10
|
(4)
|
28
|
(21)
|
| Foreign corporate private securities | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
472
|
367
|
341
|
354
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
(27)
|
|
(42)
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
17
|
(6)
|
41
|
(9)
|
| Purchases |
54
|
16
|
178
|
16
|
| Issuances |
|
|
|
0
|
| Sales |
|
(8)
|
|
(8)
|
| Settlements |
(12)
|
(6)
|
(14)
|
(34)
|
| Transfers in to Level 3 |
|
|
|
44
|
| Transfers out of Level 3 |
|
|
|
0
|
| Fair Value, assets, ending balance |
504
|
363
|
504
|
363
|
| Change in Unrealized Gains (Losses) Included in Earnings |
1
|
|
(14)
|
0
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
17
|
(6)
|
41
|
(10)
|
| Residential mortgage-backed | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
61
|
43
|
54
|
48
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
|
(4)
|
(2)
|
(5)
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
|
0
|
| Purchases |
23
|
|
39
|
0
|
| Issuances |
|
|
|
0
|
| Sales |
|
|
|
0
|
| Settlements |
|
|
|
0
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
|
(7)
|
(4)
|
| Fair Value, assets, ending balance |
84
|
39
|
84
|
39
|
| Change in Unrealized Gains (Losses) Included in Earnings |
|
(3)
|
(2)
|
(4)
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
0
|
0
|
| Foreign corporate public securities and foreign governments |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
48
|
|
48
|
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
(1)
|
|
| Purchases |
|
12
|
1
|
|
| Fair Value, assets, ending balance |
48
|
12
|
48
|
12
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
(1)
|
|
| Foreign corporate public securities and foreign governments | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Purchases |
|
|
|
12
|
| Fair Value, assets, ending balance |
|
12
|
|
12
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
|
|
|
0
|
| Other asset-backed securities | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
14
|
39
|
14
|
37
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
|
|
|
0
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
|
0
|
| Purchases |
55
|
|
57
|
0
|
| Issuances |
|
|
|
0
|
| Sales |
|
(8)
|
|
(8)
|
| Settlements |
(1)
|
(1)
|
(3)
|
(2)
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
(13)
|
|
(10)
|
| Fair Value, assets, ending balance |
68
|
17
|
68
|
17
|
| Change in Unrealized Gains (Losses) Included in Earnings |
|
|
|
0
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
0
|
0
|
| Fixed maturities | Available-for-sale Securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
1,949
|
1,589
|
1,675
|
1,637
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
(25)
|
(4)
|
(44)
|
(5)
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
32
|
(10)
|
71
|
(25)
|
| Purchases |
222
|
80
|
516
|
135
|
| Issuances |
|
|
|
0
|
| Sales |
(23)
|
(16)
|
(30)
|
(25)
|
| Settlements |
(95)
|
(42)
|
(121)
|
(137)
|
| Transfers in to Level 3 |
|
|
|
44
|
| Transfers out of Level 3 |
|
(13)
|
(7)
|
(40)
|
| Fair Value, assets, ending balance |
2,060
|
1,584
|
2,060
|
1,584
|
| Change in Unrealized Gains (Losses) Included in Earnings |
1
|
(3)
|
(16)
|
(4)
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
27
|
(10)
|
69
|
(52)
|
| Equity securities |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
64
|
57
|
56
|
54
|
| Total Realized/Unrealized Gains (Losses) Included in Net Income |
|
(1)
|
2
|
2
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
|
|
|
0
|
| Purchases |
|
|
6
|
0
|
| Issuances |
|
|
|
0
|
| Sales |
(13)
|
|
(13)
|
0
|
| Settlements |
|
|
|
0
|
| Transfers in to Level 3 |
|
|
|
0
|
| Transfers out of Level 3 |
|
|
|
0
|
| Fair Value, assets, ending balance |
51
|
56
|
51
|
56
|
| Change in Unrealized Gains (Losses) Included in Earnings |
|
(1)
|
2
|
2
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
0
|
0
|
0
|
| Assets held in separate accounts |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| 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
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
0
|
$ 0
|
0
|
$ 0
|
| Cash and Cash Equivalents |
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
| Fair Value, assets, beginning balance |
20
|
|
19
|
|
| Total Realized/Unrealized Gains (Losses) Included in OCI |
1
|
|
2
|
|
| Fair Value, assets, ending balance |
21
|
|
21
|
|
| Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
$ 1
|
|
$ 2
|
|