Deferred Policy Acquisition Costs, Deferred Reinsurance, Deferred Sales Inducements and Value of Business Acquired (Balance of and Changes in VOBA) (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Movement in Present Value of Future Insurance Profits [Roll Forward] | ||
| Balance, BOP | $ 397 | |
| Balance, EOP | 366 | |
| Gibraltar Life and Other | ||
| Movement in Present Value of Future Insurance Profits [Roll Forward] | ||
| Balance, BOP | 384 | $ 421 |
| Amortization expense | (17) | (20) |
| Foreign currency adjustment | (12) | 35 |
| Balance, EOP | 355 | 436 |
| Other businesses | ||
| Movement in Present Value of Future Insurance Profits [Roll Forward] | ||
| Balance, EOP | 11 | 14 |
| Gibraltar Life and Other And Other Businesses | ||
| Movement in Present Value of Future Insurance Profits [Roll Forward] | ||
| Balance, EOP | $ 366 | $ 450 |