Investments and Derivative Instruments Level 4 Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Offsetting Derivative Assets [Abstract]
Derivative Asset, Fair Value, Gross Asset		$ 933	$ 1,175
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		756	969
Derivative, Collateral, Obligation to Return Cash		176	158
Derivative Asset, Fair Value of Collateral		100	109
Derivative Asset, Fair Value, Amount Offset Against Collateral		77	97
Offsetting Derivative Liabilities [Abstract]
Derivative Liability, Fair Value, Amount Offset Against Collateral		23	137
Derivative Liability, Fair Value of Collateral		889	1,079
Derivative, Collateral, Right to Reclaim Cash		114	15
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		818	799
Derivative Liability, Fair Value, Gross Liability		1,730	1,741
Derivative Financial Instruments, Liabilities [Member]
Offsetting Derivative Liabilities [Abstract]
Derivative Liability, Fair Value, Amount Offset Against Collateral		283	413
Other Liabilities [Member]
Offsetting Derivative Assets [Abstract]
Derivative Asset, Fair Value, Gross Asset		524	551
Offsetting Derivative Liabilities [Abstract]
Derivative Liability, Fair Value, Gross Liability		1,322	1,481
Other Liabilities [Member] | Embedded Derivative Financial Instruments [Member]
Offsetting Derivative Assets [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[1]		(3)
Other Liabilities [Member] | Derivative Financial Instruments, Liabilities [Member]
Offsetting Derivative Assets [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[2]	(798)	(927)
Other Investments [Member]
Offsetting Derivative Assets [Abstract]
Derivative Asset, Fair Value, Gross Asset		409	624
Offsetting Derivative Liabilities [Abstract]
Derivative Liability, Fair Value, Gross Liability		408	260
Other Investments [Member] | Derivative Financial Instruments, Assets [Member]
Offsetting Derivative Assets [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[3]	$ 1	$ 364

[1] [6]Represents embedded derivatives associated with non-funding agreement-backed consumer equity linked notes

[2] [5]Includes OTC and OTC-cleared derivative instruments in a net negative fair market value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements, clearing house rules and applicable law. In the following Level 3 roll-forward table in this Note 4, the derivative assets and liabilities are referred to as “freestanding derivatives” and are presented on a net basis.

[3] [2]Includes OTC and OTC-cleared derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements, clearing house rules and applicable law. As of December 31, 2015 and 2014, $283 and $413, respectively, of cash collateral liability was netted against the derivative asset value in the Consolidated Balance Sheets and is excluded from the preceding table. See footnote 5 for derivative liabilities.