Fair Value Measurements (Details 3) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance		$ (1,369)	$ (3,861)
Impact of accounting change			2,701
Total realized/unrealized gains (losses) included in Net income		(17)	(50)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)		0	0
Purchases and issuances		(82)	(47)
Sales and settlements		18	14
Transfer into Level 3		0	0
Transfer out of Level 3		0	0
Financial liabilities, Ending Balance	[1]	(1,450)	(1,243)
Liabilities of Managed Investment Entities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance			(2,701)
Impact of accounting change	[2]		2,701
Total realized/unrealized gains (losses) included in Net income			0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)			0
Purchases and issuances			0
Sales and settlements			0
Transfer into Level 3			0
Transfer out of Level 3			0
Financial liabilities, Ending Balance			0
Embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance		(1,369)	(1,160)
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net income		(17)	(50)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)		0	0
Purchases and issuances		(82)	(47)
Sales and settlements		18	14
Transfer into Level 3		0	0
Transfer out of Level 3		0	0
Financial liabilities, Ending Balance		$ (1,450)	$ (1,243)

[1] As discussed above, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

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