Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions		Mar. 31, 2016	Dec. 31, 2015
Not Designated as Hedging Instrument [Member] | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	$ 103	$ 430
Asset Derivatives, Netting across contract types	[1],[2]	(63)	(171)
Asset Derivatives, Total	[1],[2]	40	259
Not Designated as Hedging Instrument [Member] | Other assets | Equity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	79	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	[1]	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	[1]	1	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	[1]	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	[1]	23	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	[3]	530	204
Derivative Liability, Fair Value, Amount Offset Against Collateral	[2],[3]	(63)	(171)
Derivative contracts at fair value (liability)	[2],[3]	467	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	[3]	414	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	[3]	13	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	[3]	36	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	[3]	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	[3]	67	10
Investment Funds [Member] | Investment Segment [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Collateral for derivative positions		$ 476	$ 883

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

[2] Excludes netting of cash collateral received and posted. The total collateral posted at March 31, 2016 and December 31, 2015 was $476 million and $883 million, respectively, across all counterparties.

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