| Item | Type | Period | Balance | Description | | Investment Income, Interest and Dividend | text | | | |
| Investment Income, Net, Amortization of Discount and Premium | text | | | |
| Investment Income, Investment Expense | $ | duration | debit | Amount of expenses related to the generation of investment income. |
| Investment Income, Net, Total | $ | duration | credit | Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. |
| Investment Income, Interest | $ | duration | credit | Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. |
| Investment Income, Dividend | $ | duration | credit | Amount of dividend income on nonoperating securities. |
| Investment Income, Interest and Dividend, Total | $ | duration | credit | Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. |
| Investment Income, Amortization of Discount | $ | duration | credit | Amount of accretion of purchase discount on nonoperating securities. |
| Investment Income, Amortization of Premium | $ | duration | debit | Amount of amortization of purchase premium on nonoperating securities. |
| Investment Income, Net, Amortization of Discount and Premium, Total | $ | duration | credit | Amount of accretion (amortization) of purchase discount (premium) on nonoperating securities. |