Policyholders' Liabilities - Liabilities for Future Policy Benefits, Weighted Average (Details)	Dec. 31, 2023	Dec. 31, 2022
Life Insurance, Permanent
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Weighted-Average Duration, Original Discount	8 years 6 months	8 years
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 6 months	8 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.89%	4.93%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.79%	5.10%
Home Service Insurance, Life Insurance, Permanent
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Weighted-Average Duration, Original Discount	16 years 4 months 24 days	15 years 4 months 24 days
Liability for Future Policy Benefit, Weighted-Average Duration	16 years 4 months 24 days	16 years 2 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.97%	5.00%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.96%	5.22%
Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Weighted-Average Duration, Original Discount	8 years 2 months 12 days	7 years 7 months 6 days
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 1 month 6 days	7 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.29%	4.30%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.77%	5.07%
Home Service Insurance, Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Weighted-Average Duration, Original Discount	14 years 9 months 18 days	14 years 3 months 18 days
Liability for Future Policy Benefit, Weighted-Average Duration	15 years 3 months 18 days	15 years 8 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	5.04%	5.05%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.95%	5.21%