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Financial Instruments Investment Segment and Holding Company Narrative (Details) - Investment Segment [Member] - Investment Funds [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Maximum payout amounts relating to put options written	$ 5,700		$ 2,500
Open Option Contracts Written, Covered Put Options on Existing Short Positions	5,700		2,400
Fair value of derivative instruments with credit-risk related contingent features in a liability position	92		614
Cash collateral posted for derivative positions	905		$ 1,200
Put Option [Member]
Derivative [Line Items]
Realized and unrealized gain (loss) on derivatives, net	$ (35)	$ (1)

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- Definition

The maximum payout of the open option contracts written for the investment.

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Open Option Contracts Written, Covered Put Options on Existing Short Positions

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- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



-Paragraph 4H



-Subparagraph (d)



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- Definition

Fair value of credit risk derivative liability.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



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-Section 45



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