Consolidated Reinsurance (Consolidated Reinsurance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums, Life Insurance in Force	$ 5,745,965	$ 5,627,777	$ 5,371,318
Ceded Premiums, Life Insurance in Force	466,498	473,860	390,521
Assumed Premiums, Life Insurance in Force	855,685	829,720	647,646
Premiums, Net, Life Insurance in Force	$ 6,135,152	$ 5,983,637	$ 5,628,443
Life Insurance in Force Premiums, Percentage Assumed to Net	13.90%	13.90%	11.50%
Consolidated Reinsurance
Gross Amount	$ 45,153	$ 43,359	$ 47,618
Ceded	3,996	2,188	2,143
Assumed	3,788	3,112	3,035
Premiums	$ 44,945	$ 44,283	$ 48,510
% Amount Assumed to Net	8.40%	7.00%	6.30%
Life insurance (1)
Consolidated Reinsurance
Gross Amount	$ 26,901	$ 25,653	$ 30,835
Ceded	3,155	1,363	1,422
Assumed	3,596	2,851	2,517
Premiums	$ 27,342	$ 27,141	$ 31,930
% Amount Assumed to Net	13.20%	10.50%	7.90%
Accident & health insurance
Consolidated Reinsurance
Gross Amount	$ 18,037	$ 17,589	$ 16,737
Ceded	841	824	715
Assumed	192	261	518
Premiums	$ 17,388	$ 17,026	$ 16,540
% Amount Assumed to Net	1.10%	1.50%	3.10%
Property and casualty insurance
Consolidated Reinsurance
Gross Amount	$ 215	$ 117	$ 46
Ceded	0	1	6
Assumed	0	0	0
Premiums	$ 215	$ 116	$ 40
% Amount Assumed to Net	0.00%	0.00%	0.00%