Financial Instruments Investment Segment and Holding Company Narrative (Details) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Non-cash investment segment contribution	$ 185,000,000	$ 0	$ 0
Cash collateral posted for derivative positions	255,000,000	148,000,000
Investment Segment [Member] | Investment Funds [Member]
Derivative [Line Items]
Maximum payout amounts relating to put options written	8,000,000,000	7,900,000,000
Covered put options on existing short positions		6,800,000,000
Unrealized gains on open option contracts written	131,000,000	180,000,000
Fair value of derivative instruments with credit-risk related contingent features in a liability position	639,000,000	84,000,000
Investment Segment [Member] | Investment Funds [Member] | Credit default swaps [Member]
Derivative [Line Items]
Term of credit default swaps		1 year
Holding Company [Member] | Investment Segment [Member]
Derivative [Line Items]
Non-cash Investment segment contribution (derivative liability shares transferred)	9.7
Non-cash investment segment contribution	234,000,000
Koala [Member] | Investment Segment [Member]
Derivative [Line Items]
Non-cash Investment segment contribution (derivative liability shares transferred)	7.7
Non-cash investment segment contribution	$ 185,000,000