Investments (Net Investment Gains Losses - Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment portfolio gains (losses)		$ 37	$ (153)
Non-investment portfolio gains (losses)	22	(151)	(7)
Goodwill Impairment Loss [Abstract]
Goodwill, Impairment Loss	0	1,868	0
Gains (losses) from foreign currency transactions	171	(112)	37
Investments sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment portfolio gains (losses)		78	1
Impairments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment portfolio gains (losses)		(41)	(154)
Non-investment portfolio gain (loss) related to disposal of certain closed blocks of business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-investment portfolio gains (losses)	30	(33)	(106)
Goodwill Impairment Loss [Abstract]
Goodwill, Impairment Loss			$ 65