Insurance in Force (Schedule Of Geographical Distribution Of Insurance In Force) (Detail) - USD ($) $ in Billions	Dec. 31, 2022	Dec. 31, 2021
Insurance in Force	$ 68.0	$ 78.5
% of Insurance in Force	100.00%	100.00%
California [Member]
Insurance in Force	$ 14.8	$ 16.8
% of Insurance in Force	21.80%	21.40%
Illinois [Member]
Insurance in Force	$ 7.5	$ 8.2
% of Insurance in Force	11.00%	10.40%
New Jersey [Member]
Insurance in Force	$ 4.1	$ 4.5
% of Insurance in Force	6.10%	5.80%
Hawaii [Member]
Insurance in Force	$ 3.8	$ 3.9
% of Insurance in Force	5.60%	5.00%
Virginia [Member]
Insurance in Force	$ 3.6	$ 3.0
% of Insurance in Force	5.20%	3.90%
Texas [Member]
Insurance in Force	$ 2.9	$ 3.1
% of Insurance in Force	4.20%	4.00%
New York [Member]
Insurance in Force	$ 2.0	$ 2.4
% of Insurance in Force	2.90%	3.00%
Oregon [Member]
Insurance in Force	$ 2.0	$ 2.3
% of Insurance in Force	3.00%	2.90%
Colorado [Member]
Insurance in Force	$ 1.8	$ 2.0
% of Insurance in Force	2.70%	2.50%
Georgia [Member]
Insurance in Force	$ 1.6	$ 1.9
% of Insurance in Force	2.40%	2.40%
Sub-Total Insurance In Force [Member]
Insurance in Force	$ 44.1	$ 48.1
% of Insurance in Force	64.90%	61.30%
Nationally Diversified [Member]
Insurance in Force	$ 7.3	$ 7.5
% of Insurance in Force	10.70%	9.60%
Other States [Member]
Insurance in Force	$ 13.7	$ 18.1
% of Insurance in Force	20.10%	23.00%
United States [Member]
Insurance in Force	$ 65.1	$ 73.7
% of Insurance in Force	95.70%	93.90%
Internationally Diversified [Member]
Insurance in Force	$ 0.2	$ 0.3
% of Insurance in Force	0.40%	0.30%
Country Specific [Member]
Insurance in Force	$ 2.7	$ 4.5
% of Insurance in Force	3.90%	5.80%
Non United States [Member]
Insurance in Force	$ 2.9	$ 4.8
% of Insurance in Force	4.30%	6.10%