Share-Based Compensation (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Share-based Compensation, Stock Options, Activity
Granted	1,300,000	1,000,000	1,500,000
Exercised	0	(100,000)	(200,000)
Stock Options [Member]
Schedule of Share-based Compensation, Stock Options, Activity
Options outstanding, Beginning Balance	2,295,076
Granted	1,044,426
Exercised	(44,933)
Forfeited	(278,556)
Options outstanding, Ending Balance	3,016,013	2,295,076
Options Vested and Exercisable	1,594,695
Weighted Average Exercise Price, Beginning of Period	37.32
Weighted Average Exercise Price, Granted	19.44
Weighted Average Exercise Price, Exercised	10.22
Weighted Average Exercise Price, Forfeited	36.90
Weighted Average Exercise Price, End of Period	31.57	37.32
Options Vested and Exercisable, Weighted Average Exercise Price	40.20
Weighted Average Remaining Contractual Life, Beginning of Period	6 years 4 months 21 days	6 years 0 months 0 days
Options Vested and Exercisable, Weighted Average Remaining Contractual Life	4 years 4 months 13 days
Aggregate Intrinsic Value, End of Period	0	0.5
Options Vested and Exercisable, Aggregate Intrinsic Value	0