Stock-Based Compensation Stock Options by Range of Exercise Prices (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	8,034,243
Weighted Average Exercise Price	$ 18.37
Remaining Life (Years)	6 years 0 months
Options Exercisable	4,923,720
Weighted Average Exercise Price	$ 21.48
Range Of Exercise Prices One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	2,000
Weighted Average Exercise Price	$ 9.26
Remaining Life (Years)	5 years 7 months
Options Exercisable	2,000
Weighted Average Exercise Price	$ 9.26
Range Of Exercise Prices Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	5,248,844
Weighted Average Exercise Price	$ 13.46
Remaining Life (Years)	7 years 9 months
Options Exercisable	2,138,321
Weighted Average Exercise Price	$ 13.45
Range Of Exercise Prices Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	608,806
Weighted Average Exercise Price	$ 17.42
Remaining Life (Years)	4 years 10 months
Options Exercisable	608,806
Weighted Average Exercise Price	$ 17.42
Range Of Exercise Prices Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	554,576
Weighted Average Exercise Price	$ 24.89
Remaining Life (Years)	3 years 10 months
Options Exercisable	554,576
Weighted Average Exercise Price	$ 24.89
Range Of Exercise Prices Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	307,172
Weighted Average Exercise Price	$ 29.03
Remaining Life (Years)	0 years 3 months
Options Exercisable	307,172
Weighted Average Exercise Price	$ 29.03
Range Of Exercise Prices Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Options Outstanding	1,312,845
Weighted Average Exercise Price	$ 33.25
Remaining Life (Years)	1 year 12 months
Options Exercisable	1,312,845
Weighted Average Exercise Price	$ 33.25