Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Liabilities of Managed Investment Entities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	$ (2,322)		$ (2,501)		$ (2,411)		$ (2,745)
Total realized/unrealized gains (losses) included in Net income	(9)	[1]	(14)	[2]	(8)	[3]	(39)	[4]
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		0
Purchases and issuances	(155)		(406)		(200)		(406)
Sales and settlements	164		439		297		689
Transfer into Level 3	0		0		0		0
Transfer out of Level 3	0		0		0		19
Financial liabilities, Ending Balance	(2,322)		(2,482)		(2,322)		(2,482)
Embedded derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	(904)		(555)		(804)		(465)
Total realized/unrealized gains (losses) included in Net income	(78)		3		(132)		(77)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		0
Purchases and issuances	(56)		(32)		(111)		(49)
Sales and settlements	12		7		21		14
Transfer into Level 3	0		0		0		0
Transfer out of Level 3	0		0		0		0
Financial liabilities, Ending Balance	$ (1,026)		$ (577)		$ (1,026)		$ (577)

[1] Total realized/unrealized gains (losses) included in net income includes gains of $1 million related to liabilities outstanding as of June 30, 2014. See Note H — “Managed Investment Entities.”

[2] Total realized/unrealized gains (losses) included in net income includes losses of $9 million related to liabilities outstanding as of June 30, 2013. See Note H — “Managed Investment Entities.”

[3] Total realized/unrealized gains (losses) included in net income includes gains of $5 million related to liabilities outstanding as of June 30, 2014. See Note H — “Managed Investment Entities.”

[4] Total realized/unrealized gains (losses) included in net income includes losses of $24 million related to liabilities outstanding as of June 30, 2013. See Note H — “Managed Investment Entities.”