XML 87 R77.htm IDEA: XBRL DOCUMENT v3.22.2
Fair Value Measurements - Narrative (Details) - Separate Account Assets - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Separate accounts assets classified in Level 3, period increase (decrease), , including transfers in and out of Level 3    
Separate accounts assets classified in Level 3, including disposal groups, period increase (decrease), including transfers in and out of Level 3    
Recurring | Securities partnerships        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Expected liquidation period after inception     10 years