Policy Liabilities - Weighted Average Duration of Liability For Future Policy Benefits (Details)	Mar. 31, 2023	Mar. 31, 2022
American Income | Life
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	22 years 10 months 24 days	22 years 9 months 18 days
At current discount rates	23 years 3 months 29 days	23 years 9 months 10 days
American Income | Health
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	12 years 1 month 24 days	12 years 5 months 12 days
At current discount rates	12 years 8 months 26 days	13 years 11 months 12 days
DTC | Life
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	20 years 2 months 26 days	20 years 9 months 21 days
At current discount rates	21 years 9 months 25 days	22 years 11 months 4 days
DTC | Health
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	11 years 4 months 24 days	11 years 8 months 4 days
At current discount rates	10 years 9 months 18 days	11 years 9 months 29 days
Liberty National | Life
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	14 years 11 months 8 days	15 years 29 days
At current discount rates	15 years 7 months 17 days	16 years 10 months 6 days
Liberty National | Health
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	9 years 3 months 21 days	9 years 3 days
At current discount rates	9 years 7 months 28 days	10 years 1 month 9 days
Other | Life
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	16 years 6 months 7 days	16 years 9 months 3 days
At current discount rates	18 years 2 months 23 days	19 years 7 months 2 days
United American | Health
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	11 years 4 months 24 days	11 years 8 months 4 days
At current discount rates	10 years 9 months 18 days	11 years 9 months 29 days
Family Heritage | Health
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	14 years 10 months 28 days	15 years 3 months 10 days
At current discount rates	14 years 5 months 4 days	15 years 9 months 18 days