Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

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.

+ References

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+ Details

- Definition

Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

+ References+ Details

Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended	3 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2012 Mutual Funds [Member]	Dec. 31, 2012 Retirement [Member]	Oct. 31, 2012 Retirement [Member]	Dec. 31, 2011 Retirement [Member]	Dec. 31, 2012 Individual Life [Member]	Sep. 30, 2012 Individual Life [Member]	Dec. 31, 2012 Individual Life [Member]	Dec. 31, 2011 Individual Life [Member]
Goodwill [Line Items]
Goodwill written off related to sale				$ 159
Goodwill impairment loss	0	0		10	0			61	0	61
Goodwill	$ 470		$ 250	$ 149	$ 87		$ 87	$ 163		$ 163	$ 224
Annual impairment test margin, percent					10.00%	10.00%