Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Liabilities of Managed Investment Entities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	$ (2,411)	[1]	$ (2,745)	[2]
Total realized/unrealized gains (losses) included in Net income	1	[1]	(25)	[2]
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	[1]	0	[2]
Purchases and issuances	(45)	[1]	0	[2]
Sales and settlements	133	[1]	250	[2]
Transfer into Level 3	0	[1]	0	[2]
Transfer out of Level 3	0	[1]	19	[2]
Financial liabilities, Ending Balance	(2,322)	[1]	(2,501)	[2]
Embedded derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	(804)		(465)
Total realized/unrealized gains (losses) included in Net income	(54)		(80)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases and issuances	(55)		(17)
Sales and settlements	9		7
Transfer into Level 3	0		0
Transfer out of Level 3	0		0
Financial liabilities, Ending Balance	$ (904)		$ (555)

[1] Total realized/unrealized loss included in net income includes gains of $4 million related to liabilities outstanding as of March 31, 2014. See Note H — “Managed Investment Entities.”

[2] Total realized/unrealized loss included in net income includes losses of $18 million related to liabilities outstanding as of March 31, 2013. See Note H — “Managed Investment Entities.”