Insurance in Force (Schedule Of Geographical Distribution Of Insurance In Force) (Detail) (USD $) In Billions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Insurance in Force	$ 554.3	$ 679.1
% of Insurance in Force	100.00%	100.00%
California [Member]
Insurance in Force	88.7	104.7
% of Insurance in Force	16.00%	15.40%
New York [Member]
Insurance in Force	38.1	48.7
% of Insurance in Force	6.90%	7.20%
Florida [Member]
Insurance in Force	29.2	36.8
% of Insurance in Force	5.30%	5.40%
Texas [Member]
Insurance in Force	28.0	33.9
% of Insurance in Force	5.00%	5.00%
Illinois [Member]
Insurance in Force	29.6	33.3
% of Insurance in Force	5.30%	4.90%
New Jersey [Member]
Insurance in Force	20.2	24.1
% of Insurance in Force	3.60%	3.60%
Michigan [Member]
Insurance in Force	15.3	17.6
% of Insurance in Force	2.80%	2.60%
Washington [Member]
Insurance in Force	11.5	15.9
% of Insurance in Force	2.10%	2.30%
Pennsylvania [Member]
Insurance in Force	11.8	14.5
% of Insurance in Force	2.10%	2.10%
Puerto Rico [Member]
Insurance in Force	10.9	9.1
% of Insurance in Force	2.00%	1.40%
Sub-Total Insurance In Force [Member]
Insurance in Force	283.3	338.6
% of Insurance in Force	51.10%	49.90%
Nationally Diversified [Member]
Insurance in Force	53.6	80.0
% of Insurance in Force	9.70%	11.80%
Other States [Member]
Insurance in Force	155.8	185.7
% of Insurance in Force	28.10%	27.30%
United States [Member]
Insurance in Force	492.7	604.3
% of Insurance in Force	88.90%	89.00%
Internationally Diversified [Member]
Insurance in Force	12.8	18.9
% of Insurance in Force	2.30%	2.80%
Country Specific [Member]
Insurance in Force	48.8	55.9
% of Insurance in Force	8.80%	8.20%
Non-United States [Member]
Insurance in Force	$ 61.6	$ 74.8
% of Insurance in Force	11.10%	11.00%