Investments and Derivative Instruments Investments and Derivative Instruments 20 (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ (2,113)		$ (2,685)
Derivative Asset, Fair Value, Gross Asset	1,522		1,948
Other Investments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,488		1,845
Derivative Asset, Fair Value, Gross Liability	1,212		1,463
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(27)	[1]	(60)	[1]
Derivative Asset, Fair Value of Collateral	184	[2]	242	[2]
Derivative Assets	249	[3]	442	[3]
Derivative Asset, Fair Value, Amount Offset Against Collateral	92		140
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Asset	(2,045)		(2,626)
Derivative Liability, Fair Value, Gross Liability	(1,104)		(1,496)
Derivative Liabilities	(806)	[4]	(1,223)	[4]
Derivative, Collateral, Right to Reclaim Cash	(135)	[4]	(93)	[4]
Derivative Liability, Fair Value of Collateral	(1,017)	[2]	(1,204)	[2]
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 76		$ (74)

[1] cluded in other assets in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative receivable associated with each counterparty.[

[2] cludes collateral associated with exchange-traded derivative instruments.C

[3] cluded in other invested assets in the Company's Condensed Consolidated Balance Sheets.[

[4] cluded in other liabilities in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative payable associated with each counterparty.[