Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Cash collateral posted for derivative positions	$ 148		$ 257
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	22	[1]	6	[1]
Asset Derivatives, Netting across contract types	(1)	[1],[2]	0	[1],[2]
Asset Derivatives, Total	21	[1],[2]	6	[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	162	[3]	42	[3]
Liability Derivatives, Netting across contract types	(1)	[2],[3]	0	[2],[3]
Liability Derivatives, Total	161	[2],[3]	42	[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	21	[1]	3	[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	35	[3]	42	[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	0	[1]	3	[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	59	[3]	0	[3]
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	[1]	0	[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]
Derivative Liability, Fair Value, Net	$ 68	[3]	$ 0	[3]

[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, 2012 and 2011 was $148 million and $257 million, respectively, across all counterparties.

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