Marketable Securities, at Fair Value (Tables)

6 Months Ended

Jun. 30, 2011

Marketable Securities, at Fair Value [Abstract]

Schedule of Available-for-sale Securities

The amortized cost, gross unrealized gain, gross unrealized loss and fair values for available-for-sale securities by major security type are as follows:

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gain		Loss		Value
	(In $ millions)
Mutual funds		70		-		-		70
As of June 30, 2011		70		-		-		70
US corporate debt securities		1		-		-		1
Mutual funds		77		-		-		77
As of December 31, 2010		78		-		-		78