Marketable Securities, at Fair Value (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities

	As of March 31, 2015	As of December 31, 2014
	(In $ millions)
Amortized cost	29	32
Gross unrealized gain	—	—
Gross unrealized loss	—	—
Fair value	29	32