Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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+ Details

Earnings (Loss) Per Share (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings (Loss) Per Share [Line Items]
Potential Conversion of convertible senior notes	$ 400		$ 400
Earnings (Loss) Per Share (Textual) [Abstract]
Shares issuable upon conversion of 10% convertible senior notes not included in the computation of diluted loss per share			35.1
Shares not included in the computation of diluted loss per share	7.9	4.9	8.0	3.4
Initial conversion price of 10% convertible senior notes not included in the computation of diluted loss per share	$ 11.40		$ 11.40
Ten Percent Convertible Senior Notes due Two Thousand Eighteen [Member]
Earnings (Loss) Per Share [Line Items]
Interest rate of convertible senior notes	10.00%		10.00%