Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions		Sep. 30, 2016	Dec. 31, 2015
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Derivative contracts, at fair value (asset)	[1]	$ 20	$ 259
Derivative contracts at fair value (liability)	[2]	768	36
Not Designated as Hedging Instrument [Member] | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	38	430
Netting across contract types	[3],[4]	(18)	(171)
Derivative contracts, at fair value (asset)	[3],[4]	20	259
Not Designated as Hedging Instrument [Member] | Other assets | Equity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	17	339
Not Designated as Hedging Instrument [Member] | Other assets | Foreign exchange contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	0	0
Not Designated as Hedging Instrument [Member] | Other assets | Credit contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	14	45
Not Designated as Hedging Instrument [Member] | Other assets | Interest rate swap contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	0	0
Not Designated as Hedging Instrument [Member] | Other assets | Commodity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[3]	7	46
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	786	204
Netting across contract types	[4],[5]	(18)	(171)
Derivative contracts at fair value (liability)	[4],[5]	768	33
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Equity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	694	122
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Foreign exchange contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	1	19
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Credit contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	70	53
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Interest rate swap contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	0	0
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Commodity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[5]	21	10
Investment Funds [Member] | Investment Segment [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Collateral for derivative positions		$ 492	$ 883

[1] Amounts are classified within other assets in our condensed consolidated balance sheets.

[2] Amounts are classified within accrued expenses and other liabilities in our condensed consolidated balance sheets.

[3] Net asset derivatives are located within other assets in our condensed consolidated balance sheets.

[4] Excludes netting of cash collateral received and posted. The total collateral posted at September 30, 2016 and December 31, 2015 was $492 million and $883 million, respectively, across all counterparties.

[5] Net liability derivatives are located within accrued expenses and other liabilities in our condensed consolidated balance sheets.