Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Liabilities of Managed Investment Entities [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial liabilities, Beginning Balance	$ (2,701)		$ (2,411)
Impact of accounting change	2,701	[1]
Total realized/unrealized gains (losses) included in Net income	0		1	[2]
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases and issuances	0		(45)
Sales and settlements	0		133
Transfer into Level 3	0		0
Transfer out of Level 3	0		0
Financial liabilities, Ending Balance	0		(2,322)
Embedded derivatives [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial liabilities, Beginning Balance	(1,160)		(804)
Impact of accounting change	0
Total realized/unrealized gains (losses) included in Net income	(50)		(54)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases and issuances	(47)		(55)
Sales and settlements	14		9
Transfer into Level 3	0		0
Transfer out of Level 3	0		0
Financial liabilities, Ending Balance	$ (1,243)		$ (904)

[1] The impact of implementing new guidance adopted in 2015, as discussed above and in Note A — “Accounting Policies — Managed Investment Entities.”

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