Business Dispositions Invested Assets Transferred (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Jan. 02, 2013 Retirement Plans and Individual Life Businesses [Member]		Jan. 02, 2013 Fair Value, Inputs, Level 3 [Member] Retirement Plans and Individual Life Businesses [Member]	Jan. 02, 2013 Fair Value, Inputs, Level 2 [Member] Retirement Plans and Individual Life Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Available-for-sale Securities, Fair Value	$ 30,126	$ 49,804	$ 15,015	[1]	$ 0	$ 14,400

[1] [2]Includes $14.4 billion and $657 of securities in level 2 and 3 of the fair value hierarchy, respectively.