Policy Liabilities - Schedule of Weighted Average Duration of Liability For Future Policy Benefits (Details)	Jun. 30, 2026	Jun. 30, 2025
Life \| American Income
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	22 years 1 month 13 days	22 years 7 months 6 days
At current discount rates	21 years 11 months 23 days	22 years 5 months 1 day
Life \| DTC
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	18 years 5 months 8 days	19 years 25 days
At current discount rates	19 years 2 months 26 days	19 years 10 months 9 days
Life \| Liberty National
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	15 years 3 months 14 days	15 years 4 months 6 days
At current discount rates	15 years 1 month 20 days	15 years 2 months 4 days
Life \| Other
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	15 years 4 months 20 days	15 years 9 months 29 days
At current discount rates	16 years 14 days	16 years 6 months 10 days
Health \| American Income
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	13 years 2 months 26 days	12 years 5 months 12 days
At current discount rates	13 years 1 month 28 days	12 years 4 months 13 days
Health \| DTC
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	12 years 5 months 1 day	11 years 8 months 4 days
At current discount rates	11 years 1 month 24 days	10 years 5 months 26 days
Health \| Liberty National
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	9 years 7 months 6 days	9 years 4 months 28 days
At current discount rates	9 years 5 months 1 day	9 years 2 months 19 days
Health \| United American
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	12 years 5 months 1 day	11 years 8 months 4 days
At current discount rates	11 years 1 month 24 days	10 years 5 months 26 days
Health \| Family Heritage
Liability for Future Policy Benefit, Activity [Line Items]
At original discount rates	16 years 2 months 26 days	15 years 3 months 10 days
At current discount rates	14 years 10 months 24 days	14 years