Income Taxes (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Income Tax Disclosure [Abstract] | ||||
| Effective income tax rate (as a percent) | 96.20% | (9.90%) | 139.60% | 9.90% |
| Valuation allowance | $ 1,700 | $ 1,700 | ||
| Valuation allowance for net operating losses | 179 | 179 | ||
| Realized and unrealized capital losses | 1,500 | 1,500 | ||
| Valuation allowance recorded in AOCI for unrealized capital losses | 1,100 | 1,100 | ||
| Increase in valuation allowance related to net operating losses | 8 | 19 | ||
| Increase in valuation allowance related to realized and unrealized capital losses | 92 | 319 | ||
| Increase in valuation allowance recorded in P&L | 51 | 191 | ||
| Increase (decrease) in valuation allowance recorded in OCI | $ 41 | $ 128 | ||