Statement of Shareholders' Equity (USD $) In Millions	Total	Common Shares [Member]	Additional Paid In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interest In Subsidiaries[Member]
Beginning balance at Dec. 31, 2012	$ (1,202)		$ 718	$ (1,747)	$ (189)	$ 16
Equity-based compensation	2		2
Distribution to a parent company	(31)		(31)
Comprehensive (loss) income, net of tax	(111)			(115)	2	2
Ending balance at Jun. 30, 2013	$ (1,342)		$ 689	$ (1,862)	$ (187)	$ 18