Investments - Mortgage Loans, Net (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Mortgage Loans | $ 103,036 | $ 95,544 |
| Commercial mortgage loans | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Investment owned, principal amount | 49,988 | 40,656 |
| Mark to fair value | (2,251) | (1,585) |
| Mortgage loans, net of allowances | 47,737 | 39,071 |
| Commercial mortgage loans | Commercial mortgage loans | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Investment owned, principal amount | 47,464 | 38,869 |
| Commercial mortgage loans | Commercial mortgage loans under development | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Investment owned, principal amount | 2,524 | 1,787 |
| Residential mortgage loans | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Investment owned, principal amount | 56,450 | 55,613 |
| Mark to fair value | (1,151) | 860 |
| Mortgage loans, net of allowances | $ 55,299 | $ 56,473 |