Share-Based Compensation (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Share-based Compensation, Stock Options, Activity
Granted	1,000,000	1,500,000	700,000
Exercised	(100,000)	(200,000)	(300,000)
Stock Options [Member]
Schedule of Share-based Compensation, Stock Options, Activity
Options outstanding, Beginning Balance	1,825,225
Granted	565,266
Exercised	(82,647)
Forfeited	(12,768)
Options outstanding, Ending Balance	2,295,076	1,825,225
Options Vested and Exercisable	1,466,271
Weighted Average Exercise Price, Beginning of Period	$ 39.85
Weighted Average Exercise Price, Granted	$ 25.02
Weighted Average Exercise Price, Exercised	$ 9.42
Weighted Average Exercise Price, Forfeited	$ 34.51
Weighted Average Exercise Price, End of Period	$ 37.32	$ 39.85
Options Vested and Exercisable, Weighted Average Exercise Price	$ 41.05
Weighted Average Remaining Contractual Life, Beginning of Period	6 years	5 years 8 months 12 days
Options Vested and Exercisable, Weighted Average Remaining Contractual Life	4 years 4 months 24 days
Aggregate Intrinsic Value, End of Period	$ 0.5	$ 2.5
Options Vested and Exercisable, Aggregate Intrinsic Value	$ 0.4