Policy Liabilities - Schedule of Weighted Average Duration of Liability For Future Policy Benefits (Details)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Life | American Income
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	22 years 3 months 25 days	22 years 8 months 23 days	23 years 3 days
At current discount rates	22 years 21 days	22 years 9 months 3 days	23 years 5 months 12 days
Life | DTC
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	18 years 8 months 1 day	19 years 2 months 26 days	19 years 6 months 29 days
At current discount rates	19 years 4 months 17 days	20 years 3 months 21 days	21 years 2 months 15 days
Life | Liberty National
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	15 years 3 months 3 days	15 years 3 months 18 days	15 years 1 month 17 days
At current discount rates	15 years 14 days	15 years 3 months 29 days	15 years 9 months 21 days
Life | Other
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	15 years 6 months 21 days	15 years 11 months 26 days	16 years 3 months 3 days
At current discount rates	16 years 1 month 28 days	16 years 11 months 1 day	17 years 11 months 1 day
Health | United American
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	12 years 5 months 4 days	11 years 8 months 19 days	11 years 5 months 15 days
At current discount rates	11 years 1 month 17 days	10 years 7 months 24 days	10 years 10 months 20 days
Health | Family Heritage
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	16 years 3 months	15 years 3 months 29 days	14 years 11 months 26 days
At current discount rates	14 years 10 months 9 days	14 years 2 months 23 days	14 years 6 months 14 days
Health | American Income
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	13 years 3 months	12 years 5 months 26 days	12 years 2 months 15 days
At current discount rates	13 years 1 month 13 days	12 years 6 months 21 days	12 years 10 months 2 days
Health | DTC
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	12 years 5 months 4 days	11 years 8 months 19 days	11 years 5 months 15 days
At current discount rates	11 years 1 month 17 days	10 years 7 months 24 days	10 years 10 months 20 days
Health | Liberty National
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	9 years 6 months 10 days	9 years 3 months 21 days	9 years 2 months 1 day
At current discount rates	9 years 3 months 29 days	9 years 2 months 8 days	9 years 5 months 26 days