Financial Instruments Investment Segment and Holding Company Narrative (Details) (USD $) Share data in Millions, unless otherwise specified	9 Months Ended				1 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Investment Segment [Member] Investment Funds [Member]	Dec. 31, 2013 Investment Segment [Member] Investment Funds [Member]	Aug. 31, 2013 Holding Company [Member] Investment Segment [Member]	Aug. 31, 2013 Koala [Member] Investment Segment [Member]	Dec. 31, 2013 Total Return Swap [Member] Investment Segment [Member] Investment Funds [Member]	Dec. 31, 2013 Put Option [Member] Investment Segment [Member] Investment Funds [Member]
Derivative [Line Items]
Non-cash Investment segment contribution (derivative liability shares transferred)					9.7	7.7
Non-cash investment segment contribution	$ 0	$ 185,000,000			$ 234,000,000	$ 185,000,000
Maximum payout amounts relating to put options written			13,700,000,000	8,000,000,000
Realized and unrealized gain (loss) on derivatives, net			36,000,000				14,000,000	131,000,000
Fair value of derivative instruments with credit-risk related contingent features in a liability position			103,000,000	639,000,000
Cash collateral posted for derivative positions			$ 1,100,000,000	$ 255,000,000