Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities - Additional Product Information (Details)	12 Months Ended
	Dec. 31, 2021 item
Fixed annuities
Policyholder account balances, future policy benefits and claims
Number of crediting durations offered for indexed account	2
EIA
Policyholder account balances, future policy benefits and claims
Contract initial term	7 years
Minimum interest rate guarantee	3.00%
Percentage of initial premium receiving interest guarantee	90.00%
IUL insurance
Policyholder account balances, future policy benefits and claims
Number of crediting durations offered for indexed account	2
Disability income
Policyholder account balances, future policy benefits and claims
Unpaid reported claims discount rate (as a percent)	4.50%
Long term care insurance
Policyholder account balances, future policy benefits and claims
Unpaid reported claims discount rate (as a percent)	5.95%
Minimum
Policyholder account balances, future policy benefits and claims
Fixed annuities liabilities interest rates	2.23%
Minimum | Fixed annuities
Policyholder account balances, future policy benefits and claims
Indexed account interest crediting period	1 year
Minimum | IUL insurance
Policyholder account balances, future policy benefits and claims
Indexed account interest crediting period	1 year
Minimum | Term and whole life insurance
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	2.25%
Minimum | Disability income
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	3.00%
Minimum | Long term care insurance
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	5.00%
Maximum
Policyholder account balances, future policy benefits and claims
Fixed annuities liabilities interest rates	9.38%
Maximum | Fixed annuities
Policyholder account balances, future policy benefits and claims
Indexed account interest crediting period	2 years
Maximum | IUL insurance
Policyholder account balances, future policy benefits and claims
Indexed account interest crediting period	2 years
Maximum | Term and whole life insurance
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	10.00%
Maximum | Disability income
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	7.50%
Maximum | Long term care insurance
Policyholder account balances, future policy benefits and claims
Anticipated interest rate for future claims	5.70%
Average
Policyholder account balances, future policy benefits and claims
Fixed annuities liabilities interest rates	3.60%