Policy Liabilities - Schedule of Weighted Average Interest Rate of Liability For Future Policy Benefits (Details)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
American Income | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.70%	5.80%	5.90%
Weighted average current discount rate	4.90%	5.20%	3.30%
American Income | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.80%	5.90%	6.00%
Weighted average current discount rate	4.80%	5.10%	3.00%
DTC | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	6.00%	6.00%	6.00%
Weighted average current discount rate	5.00%	5.20%	3.40%
DTC | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.10%	5.20%	5.10%
Weighted average current discount rate	4.80%	5.10%	2.70%
Liberty National | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.60%	5.60%	5.60%
Weighted average current discount rate	5.00%	5.20%	3.10%
Liberty National | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.80%	5.80%	5.80%
Weighted average current discount rate	4.90%	5.20%	2.70%
Other premium | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	6.20%	6.20%	6.20%
Weighted average current discount rate	5.00%	5.20%	3.20%
United American | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	5.10%	5.20%	5.10%
Weighted average current discount rate	4.80%	5.10%	2.70%
Family Heritage | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average original discount rate	4.30%	4.30%	4.30%
Weighted average current discount rate	4.90%	5.20%	2.90%