Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity	Non-controlling Interest
Stockholders' equity including non-controlling interest, beginning balance at Dec. 31, 2011	$ 156	$ 10	$ 0	$ 2,561	$ (2,241)	$ (174)	$ 156	$ 0
Common shares issued, beginning balance at Dec. 31, 2011		105,329	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(125)				(126)		(126)	1
Other comprehensive loss	(59)					(59)	(59)
Share-based compensation	17			17			17
Number of stock issuances		2,522	0
Value of stock issuances	24	1	6	17			24
Number of repurchases of common stock			(1)
Value of repurchases of common stock	(6)		(6)				(6)
Issuance of common stock upon conversion of debt	0
Changes in noncontrolling interest	12						0	12
Stockholders' equity including non-controlling interest, beginning balance at Dec. 31, 2012	19	11	0	2,595	(2,367)	(233)	6	13
Common shares issued, ending balance at Dec. 31, 2012		107,851	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	46				47		47	(1)
Other comprehensive loss	257					257	257
Share-based compensation	19			19			19
Number of stock issuances		954	314
Value of stock issuances	5	0	9	(4)			5
Number of repurchases of common stock			(313)
Value of repurchases of common stock	(9)		(9)				(9)
Number of stock issued upon conversion of debt		28,509
Issuance of common stock upon conversion of debt	313	3		310			313
Changes in noncontrolling interest	12						0	12
Stockholders' equity including non-controlling interest, beginning balance at Dec. 31, 2013	662	14	0	2,920	(2,320)	24	638	24
Common shares issued, ending balance at Dec. 31, 2013		137,314	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	38				37		37	1
Other comprehensive loss	(362)					(362)	(362)
Share-based compensation	21			21			21
Number of stock issuances		947	166
Value of stock issuances	5	0	4	1			5
Number of repurchases of common stock			(238)
Value of repurchases of common stock	(7)		(7)				(7)
Number of stock issued upon conversion of debt		6,507	72
Issuance of common stock upon conversion of debt	75	0	3	72			75
Changes in noncontrolling interest	(24)						0	(24)
Stockholders' equity including non-controlling interest, beginning balance at Dec. 31, 2014	$ 408	$ 14	$ 0	$ 3,014	$ (2,283)	$ (338)	$ 407	$ 1
Common shares issued, ending balance at Dec. 31, 2014		144,768	0