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