Insurance in Force (Schedule Of Geographical Distribution Of Insurance In Force) (Detail) - USD ($) $ in Billions	Dec. 31, 2020	Dec. 31, 2019
Insurance in Force	$ 91.4	$ 107.5
% of Insurance in Force	100.00%	100.00%
California [Member]
Insurance in Force	$ 20.0	$ 22.4
% of Insurance in Force	21.90%	20.90%
Illinois [Member]
Insurance in Force	$ 8.9	$ 10.2
% of Insurance in Force	9.70%	9.50%
New York [Member]
Insurance in Force	$ 3.0	$ 4.7
% of Insurance in Force	3.30%	4.40%
Puerto Rico [Member]
Insurance in Force	$ 2.9	$ 3.3
% of Insurance in Force	3.20%	3.10%
New Jersey [Member]
Insurance in Force	$ 5.4	$ 6.0
% of Insurance in Force	5.90%	5.60%
Texas [Member]
Insurance in Force	$ 3.7	$ 4.0
% of Insurance in Force	4.00%	3.70%
Hawaii [Member]
Insurance in Force	$ 4.1	$ 4.2
% of Insurance in Force	4.40%	3.90%
Virginia [Member]
Insurance in Force	$ 3.2	$ 3.6
% of Insurance in Force	3.60%	3.30%
Oregon [Member]
Insurance in Force	$ 2.7	$ 2.9
% of Insurance in Force	2.90%	2.70%
Sub-Total Insurance In Force [Member]
Insurance in Force	$ 56.0	$ 64.1
% of Insurance in Force	61.20%	59.70%
Nationally Diversified [Member]
Insurance in Force	$ 8.7	$ 11.8
% of Insurance in Force	9.50%	11.00%
Other States [Member]
Insurance in Force	$ 19.8	$ 23.5
% of Insurance in Force	21.70%	21.80%
United States [Member]
Insurance in Force	$ 84.5	$ 99.4
% of Insurance in Force	92.40%	92.50%
Internationally Diversified [Member]
Insurance in Force	$ 0.3	$ 0.3
% of Insurance in Force	0.30%	0.30%
Country Specific [Member]
Insurance in Force	$ 6.6	$ 7.8
% of Insurance in Force	7.30%	7.20%
Non United States [Member]
Insurance in Force	$ 6.9	$ 8.1
% of Insurance in Force	7.60%	7.50%
COLORADO
Insurance in Force	$ 2.1	$ 2.8
% of Insurance in Force	2.30%	2.60%