Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Asset Derivatives, Gross	$ 0	[1]	$ 6	[1]
Asset Derivatives, Netting across contract types	0	[1],[2]	0	[1],[2]
Asset Derivatives, Total	0	[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	505	[3]	42	[3]
Liability Derivatives, Netting across contract types	0	[2],[3]	0	[2],[3]
Liability Derivatives, Total	505	[2],[3]	42	[2],[3]
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | 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] | Equity Contract [Member] | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	383	[3]	42	[3]
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | 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 Contract [Member] | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Liability Derivatives, Gross	6	[3]	0	[3]
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other Assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	0	[1]	0	[1]
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Accrued Expenses and Other Liabilities [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	116	[3]	0	[3]
Investment Funds [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]
Cash collateral posted for derivative positions	$ 382		$ 257

[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 September 30, 2012 and December 31, 2011 was $382 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.