Earned Life Insurance Premiums on Ceded Business (Detail) (Life Insurance Segment, USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Life Insurance Segment
Direct earned premiums	$ 55	$ 54	$ 105	$ 104
Assumed earned premiums	0	0	0	0
Ceded earned premiums	(12)	(14)	(25)	(25)
Net earned premiums	$ 43	$ 40	$ 80	$ 79