Insurance in Force (Schedule Of Geographical Distribution Of Insurance In Force) (Detail) - USD ($) $ in Billions	Dec. 31, 2021	Dec. 31, 2020
Insurance in Force	$ 78.5	$ 91.4
% of Insurance in Force	100.00%	100.00%
California [Member]
Insurance in Force	$ 16.8	$ 20.0
% of Insurance in Force	21.40%	21.90%
Illinois [Member]
Insurance in Force	$ 8.2	$ 8.9
% of Insurance in Force	10.40%	9.70%
New York [Member]
Insurance in Force	$ 2.4	$ 3.0
% of Insurance in Force	3.00%	3.30%
Puerto Rico [Member]
Insurance in Force	$ 2.7	$ 2.9
% of Insurance in Force	3.40%	3.20%
New Jersey [Member]
Insurance in Force	$ 4.5	$ 5.4
% of Insurance in Force	5.80%	5.90%
Texas [Member]
Insurance in Force	$ 3.1	$ 3.7
% of Insurance in Force	4.00%	4.00%
Hawaii [Member]
Insurance in Force	$ 3.9	$ 4.1
% of Insurance in Force	5.00%	4.40%
Virginia [Member]
Insurance in Force	$ 3.0	$ 3.2
% of Insurance in Force	3.90%	3.60%
Oregon [Member]
Insurance in Force	$ 2.3	$ 2.7
% of Insurance in Force	2.90%	2.90%
Sub-Total Insurance In Force [Member]
Insurance in Force	$ 48.9	$ 56.0
% of Insurance in Force	62.30%	61.20%
Nationally Diversified [Member]
Insurance in Force	$ 7.5	$ 8.7
% of Insurance in Force	9.60%	9.50%
Other States [Member]
Insurance in Force	$ 17.3	$ 19.8
% of Insurance in Force	22.00%	21.70%
United States [Member]
Insurance in Force	$ 73.7	$ 84.5
% of Insurance in Force	93.90%	92.40%
Internationally Diversified [Member]
Insurance in Force	$ 0.3	$ 0.3
% of Insurance in Force	0.30%	0.30%
Country Specific [Member]
Insurance in Force	$ 4.5	$ 6.6
% of Insurance in Force	5.80%	7.30%
Non United States [Member]
Insurance in Force	$ 4.8	$ 6.9
% of Insurance in Force	6.10%	7.60%
COLORADO
Insurance in Force	$ 2.0	$ 2.1
% of Insurance in Force	2.50%	2.30%