Policy Liabilities - Weighted Average Interest Rate of Liability For Future Policy Benefits (Details)	Mar. 31, 2023	Mar. 31, 2022
American Income | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.80%	5.80%
Weighted average discount rate	4.90%	4.00%
American Income | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.90%	5.90%
Weighted average discount rate	4.80%	3.80%
DTC | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	6.00%	6.00%
Weighted average discount rate	5.00%	4.00%
DTC | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.20%	5.20%
Weighted average discount rate	4.80%	3.80%
Liberty National | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.60%	5.60%
Weighted average discount rate	5.00%	3.90%
Liberty National | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.80%	5.80%
Weighted average discount rate	4.90%	3.60%
Other | Life
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	6.20%	6.20%
Weighted average discount rate	5.00%	3.90%
United American | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	5.20%	5.20%
Weighted average discount rate	4.80%	3.80%
Family Heritage | Health
Liability for Future Policy Benefit, Activity [Line Items]
Weighted average interest rate	4.30%	4.40%
Weighted average discount rate	4.90%	3.90%