Net (Loss) Income Per Share (Common Stock Equivalents That Were Not Included In The Calculation Of Diluted Net (Loss) Income Per Share) (Details) (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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price of warrants	35.88		36.60		35.88
Conversion price	23.77		24.25		23.77
Employee Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents not included in the calculation of diluted net income per share	6.1	[1],[2]	6.4	[1],[2]	6.1	[1],[2]
Warrants To Purchase Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents not included in the calculation of diluted net income per share	15.8	[3]	15.5	[3]	15.8	[3]
Convertible Debt Instruments [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents not included in the calculation of diluted net income per share	12.1	[4]	15.5	[4]	12.1	[4]

[1] For the third quarter of 2012 and the first nine months of 2012, these common stock equivalents were excluded because the effect of their inclusion would reduce our net loss per share in these periods and would be antidilutive. In addition, the exercise prices of these common stock equivalents exceeded the average market price of our common stock during these periods.

[2] For the third quarter of 2011 and the first nine months of 2011, these common stock equivalents were excluded because their exercise prices exceeded the average market price of our common stock during this period, and the effect of their inclusion would be antidilutive.

[3] These common stock equivalents were excluded because their exercise prices ($35.88 per share, $36.60 per share, $35.88 per share and $36.60 per share for each period, respectively) exceeded the average market prices of our common stock during these periods, and the effect of their inclusion would be antidilutive.

[4] These common stock equivalents were excluded because their conversion prices ($23.77 per share, $24.25 per share, $23.77 per share and $24.25 per share for each period, respectively) exceeded the average market prices of our common stock during these periods, and the effect of their inclusion would be antidilutive.