Stock-Based Employee Compensation (Options Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Number of Options
Outstanding at January 1, 2013 (Options)	4,448,773
Granted (Options)	0
Exercised (Options)	(1,206,860)
Canceled (Options)	(547,041)
Outstanding at December 31, 2013 (Options)	2,694,872	4,448,773
Vested and expected to vest at December 31, 2013 (Options)	2,678,160
Options Exercisable at December 31, 2013 (Options)	2,344,123
Weighted-Average Exercise Price
Outstanding at January 1, 2013 (Price per Share)	$ 33.56
Granted (Price per Share)	$ 0.00
Exercised (Price per Share)	$ 25.42
Canceled (Price per Share)	$ 37.37
Outstanding at December 31, 2013 (Price per Share)	$ 36.30	$ 33.56
Vested and expected to vest at December 31, 2012 (Price per Share)	$ 36.27
Options Exercisable at December 31, 2013 (Price per Share)	$ 36.42
Weighted-Average Remaining Contractual Term
Outstanding at January 1, 2013 (Years)	3 years 9 months 29 days	4 years 6 months 18 days
Outstanding at December 31, 2013 (Years)	3 years 9 months 29 days	4 years 6 months 18 days
Vested and expected to vest at December 31, 2013 (Years)	3 years 9 months 22 days
Options Exercisable at December 31, 2013 (Years)	3 years 4 months 28 days
Aggregate Intrinsic Value
Outstanding at January 1, 2012	$ 25,522,000
Outstanding at December 31, 2012	30,080,000	25,522,000
Vested and expected to vest at December 31, 2012	29,978,000
Options Exercisable at December 31, 2012	25,914,000
Weighted-average estimated fair value of stock options granted (Price per Share)		$ 9.90	$ 21.39
Total intrinsic value of stock options exercised	17,500,000	15,300,000	17,300,000
Stock Option
Aggregate Intrinsic Value
Total unrecognized compensation cost	$ 700,000
Weighted-average period of unrecognized compensation cost to be recognized (Years)	4 months 24 days