Consolidated Statements of Operations Parenthetical (Details) (USD $)	12 Months Ended	3 Months Ended	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Individual Life [Member]	Dec. 31, 2012 Individual Life [Member]	Dec. 31, 2011 Individual Life [Member]
Goodwill impairment	$ 0	$ 30,000,000	$ 0	$ 342,000,000	$ 342	$ 0

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details