Future Contract Benefit (Summary of Weighted-Average Interest Rates (Details)	Mar. 31, 2023	Dec. 31, 2022
Traditional Life [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Interest accretion rate	5.10%	5.10%
Current discount rate	4.80%	5.10%
Payout Annuities [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Interest accretion rate	3.90%	3.90%
Current discount rate	4.90%	5.30%
UL and Other [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Interest accretion rate	5.00%	5.00%
Group Protection [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Interest accretion rate	2.90%	2.80%
Current discount rate	4.80%	5.10%