Fair Value Measurements - Assets and Liabilities Measured at Fair Value under Certain Conditions (Details) - USD ($) |
12 Months Ended | |
---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Realized investment losses on assets measured at fair value under certain conditions, after-tax | ||
Realized investment gains on equity securities with no readily determinable fair value |