Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	$ 78	[1]	$ 29	[1]
Asset Derivatives, Netting across contract types	(6)	[1],[2]	(7)	[1],[2]
Asset Derivatives, Total	72	[1],[2]	22	[1],[2]
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	668	[3]	168	[3]
Liability Derivatives, Netting across contract types	(6)	[2],[3]	(7)	[2],[3]
Derivative contracts at fair value (liability)	662	[2],[3]	161	[2],[3]
Not Designated as Hedging Instrument [Member] | Equity contracts | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	0	[1]	21	[1]
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	662	[3]	35	[3]
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	4	[1]	0	[1]
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	4	[3]	59	[3]
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	74	[1]	8	[1]
Not Designated as Hedging Instrument [Member] | Commodity contracts | Accrued expenses and other liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	2	[3]	74	[3]
Investment Funds [Member] | Investment Segment [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Cash collateral posted for derivative positions	$ 270		$ 148

[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 June 30, 2013 and December 31, 2012 was $270 million and $148 million, respectively, across all counterparties.

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