Fair Value Measurements (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Liabilities of Managed Investment Entities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance	$ (2,745)	[1],[2]	$ (2,593)	[1],[3]	$ (2,258)	[3]
Total realized/unrealized gains (losses) included in Net income	(26)	[2]	(189)	[1]	0	[3]
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	[2]	0	[1]	0	[3]
Purchases and issuances	(727)	[2]	(793)	[1]	(401)	[3]
Sales and settlements	1,068	[2]	830	[1]	66	[3]
Transfers into Level 3	0	[2]	0	[1]	0	[3]
Transfers out of Level 3	19	[2]	0	[1]	0	[3]
Financial liabilities, Ending Balance	(2,411)	[2]	(2,745)	[1],[2]	(2,593)	[1],[3]
Embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance	(465)		(361)		(181)
Total realized/unrealized gains (losses) included in Net income	(182)		(57)		(29)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0		0
Purchases and issuances	(192)		(73)		(171)
Sales and settlements	35		26		20
Transfers into Level 3	0		0		0
Transfers out of Level 3	0		0		0
Financial liabilities, Ending Balance	$ (804)		$ (465)		$ (361)

[1] Total realized/unrealized loss included in net income includes losses of $125 million related to liabilities outstanding as of December 31, 2012. See Note H — “Managed Investment Entities.”

[2] Total realized/unrealized loss included in net income includes gains of $7 million related to liabilities outstanding as of December 31, 2013. See Note H — “Managed Investment Entities.”

[3] Total realized/unrealized loss included in net income includes losses of $3 million related to liabilities outstanding as of December 31, 2011. See Note H — “Managed Investment Entities.”