Policyholder Account Balances - Amounts on Balance Sheet (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | $ 106,376 | $ 104,091 | ||
| Group Life | ||||
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | 10,297 | 10,197 | $ 10,382 | |
| Capital Markets Investment Products and Stable Value GICs | ||||
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | 61,418 | 59,278 | 60,373 | $ 57,799 |
| Annuities and Risk Solutions | ||||
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | 16,388 | 15,671 | 15,090 | |
| Fixed Annuity | ||||
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | 5,466 | 5,788 | $ 6,022 | |
| Other Products | ||||
| Policyholder Account Balance [Line Items] | ||||
| Policyholder account balance | $ 12,807 | $ 13,157 |