Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Cash collateral posted for derivative positions		$ 883	$ 1,200
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	430	60
Netting across contract types	[1],[2]	(171)	(10)
Derivative contracts, at fair value(1)	[1],[2]	259	50
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]	204	637
Liability Derivatives, Netting across contract types	[2],[3]	(171)	(10)
Liability Derivatives, Total	[2],[3]	33	627
Not Designated as Hedging Instrument [Member] | Equity contracts | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	339	0
Not Designated as Hedging Instrument [Member] | Equity contracts | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[3]	122	552
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	0	11
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[3]	19	0
Not Designated as Hedging Instrument [Member] | Credit contracts | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	45	1
Not Designated as Hedging Instrument [Member] | Credit contracts | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[3]	53	85
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	[1]	0	1
Not Designated as Hedging Instrument [Member] | Interest rate contracts | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	[3]	0	0
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	[1]	46	47
Not Designated as Hedging Instrument [Member] | Commodity contracts | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	[3]	$ 10	$ 0

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

[2] Excludes netting of cash collateral received and posted. The total collateral posted at December 31, 2015 and 2014 was $883 million and $1.2 billion, respectively, across all counterparties.

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