Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2012

Other Current Assets [Abstract]

Summary of other current assets

(in $ millions)	December 31, 2012		December 31, 2011
Development advances		68		63
Restricted cash of subsidiaries		56		16
Sales and use tax receivables		48		49
Assets held for sale		16		16
Prepaid expenses		15		15
Derivative assets		10		2
Other		7		7
		220		168