Other Current Assets (Tables)

6 Months Ended

Jun. 30, 2012

Other Current Assets [Abstract]

Summary of other current assets

(in $ millions)	June 30, 2012		December 31, 2011
Development advances		67		63
Sales and use tax receivables		54		49
Restricted cash of subsidiaries		37		16
Prepaid expenses		19		15
Assets held for sale		16		16
Derivative assets		8		2
Other		7		7
		208		168