Share-Based Compensation Share-Based Compensation Price Ranges (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Stock Options (in shares)	3,393,281
Outstanding Stock Options Weighted Average Remaining Contractual Term (in years)	5 years 0 months 7 days
Outstanding Stock Options Weighted Average Exercise Price (in dollars per share)	$ 27.74
Exercisable Stock Options (in shares)	1,963,668.000
Exercisable Stock Options, Weighted Average Exercise Price (in dollars per share)	$ 27.23
Exercise Price Range 18.00 to 21.14 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Stock Options (in shares)	1,437,505
Outstanding Stock Options Weighted Average Remaining Contractual Term (in years)	5 years 2 months 1 day
Outstanding Stock Options Weighted Average Exercise Price (in dollars per share)	$ 19.67
Exercisable Stock Options (in shares)	911,992
Exercisable Stock Options, Weighted Average Exercise Price (in dollars per share)	$ 19.89
Exercise Price Range 21.15 to 37.13 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Stock Options (in shares)	1,202,841
Outstanding Stock Options Weighted Average Remaining Contractual Term (in years)	5 years 0 months 7 days
Outstanding Stock Options Weighted Average Exercise Price (in dollars per share)	$ 29.29
Exercisable Stock Options (in shares)	537,441
Exercisable Stock Options, Weighted Average Exercise Price (in dollars per share)	$ 28.96
Exercise Price Range 37.14 to 52.78 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Stock Options (in shares)	752,935
Outstanding Stock Options Weighted Average Remaining Contractual Term (in years)	4 years 8 months 19 days
Outstanding Stock Options Weighted Average Exercise Price (in dollars per share)	$ 40.69
Exercisable Stock Options (in shares)	514,235
Exercisable Stock Options, Weighted Average Exercise Price (in dollars per share)	$ 38.44