Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income (loss)	$ 46	$ (125)	$ (390)
Less: Income (loss) from discontinued operations, net of tax	(2)	2	6
Less: Gain on sale of discontinued operations, net of tax	0	55	0
Income (loss) from continuing operations	48	(182)	(396)
Adjustments to reconcile income (loss) from continuing operations to net cash:
Depreciation, depletion and amortization	155	156	164
Loss on extinguishment of debt	0	41	0
Long-lived asset impairment charges	0	8	53
Share-based compensation expense	19	17	21
Deferred income taxes	2	4	(8)
Provision for Bad Debt	0	7	9
Gain on asset dispositions	(1)	(8)	(6)
Pension Settlement	16	0	0
(Increase) decrease in working capital:
Receivables	(44)	6	(15)
Income taxes receivable	(1)	6	(5)
Inventories	(28)	(12)	(17)
Increase (Decrease) in Other Current Assets	(4)	5	(3)
Payables	(4)	27	17
Accrued expenses	(23)	14	(10)
Decrease (increase) in other assets	(6)	1	(2)
Increase (Decrease) in Pension and Postretirement Obligations	(63)	(16)	(23)
(Decrease) increase in other liabilities	(6)	(5)	17
Other, net	20	(1)	(1)
Net cash provided by (used for) operating activities - continuing operations	80	68	(205)
Investing Activities
Purchases of marketable securities	(205)	(137)	(355)
Sales or maturities of marketable securities	194	291	345
Capital expenditures	(124)	(70)	(54)
Acquisition of mining rights	(17)	(16)	0
Net proceeds from asset dispositions	2	14	9
Net proceeds from sale of business	0	73	0
Investment in joint ventures	(5)	(14)	0
Loans to joint ventures	0	(4)	(4)
Insurance proceeds	2	0	2
Return (deposit) of restricted cash	(4)	1	2
Net cash provided by (used for) investing activities - continuing operations	(157)	138	(55)
Financing Activities
Issuance of debt	361	248	0
Repayment of debt	(4)	(283)	(6)
Payment of debt issuance fees	(6)	(5)	0
Loan from venture partner	4	4	0
Issuance of common stock	4	4	0
Repurchases of common stock to satisfy employee tax withholding obligations	(9)	(6)	(3)
Net cash (used for) provided by financing activities - continuing operations	350	(38)	(9)
Net cash provided by operating activities - discontinued operations	(2)	10	11
Net cash used for investing activities - discontinued operations	0	(1)	(1)
Effect of exchange rate changes on cash	(7)	4	(5)
Net increase (decrease) in cash and cash equivalents	264	181	(264)
Cash and cash equivalents at beginning of period	546	365	629
Cash and cash equivalents at end of period	810	546	365
Supplemental Cash Flow Disclosures:
Interest paid, net of interest capitalized	192	200	196
Income taxes paid, net of refunds received	10	1	6
Amount in accounts payable for capital expenditures	13	10	5
Conversion of $325 million of 10% convertible senior notes due 2018, net of discount	(314)
Issuance of common stock upon conversion of debt	313
Acceleration of deferred financing fee amortization to additional paid-in capital	$ 1