Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2013

Other Current Assets [Abstract]

Summary of other current assets

(in $ millions)	March 31, 2013		December 31, 2012
Restricted cash of subsidiaries		86		56
Development advances		72		68
Sales and use tax receivables		45		48
Prepaid expenses		20		15
Assets held for sale		16		16
Derivative assets		3		10
Other		10		7
		252		220