Consolidated Investment Entities Consolidated Investment Entities (Fair Value of Derivatives) (Details 6) (Consolidated investment entities [Member], USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of variable interest or voting rights entities consolidated			3
Value of variable interest or voting rights entities consolidated			$ 1,300,000,000
Number of variable interest or voting rights entities liquidated			1
Value of variable interest or voting rights entities liquidated			300,000,000
Net investment income [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total net losses recognized in net investment income related to changes in the fair value of financial assets and liabilities for which the fair value option was elected	$ (16,000,000)	$ 32,000,000	$ 4,000,000	$ 23,000,000