Long-Term Equity Compensation (Summary of Options Outstanding and Exercisable) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
$15.30 - 20.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 15.30
Range of Exercise Prices, maximum	$ 20.00
Options Outstanding, Number of Options	147,466
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 6 months 4 days
Options Outstanding, Weighted Average Exercise Price	$ 15.41
Options Exercisable, Number of Options	147,466
Options Exercisable, Weighted Average Exercise Price	$ 15.41
$20.01 - 25.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 20.01
Range of Exercise Prices, maximum	$ 25.00
Options Outstanding, Number of Options	1,134,346
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 6 months 26 days
Options Outstanding, Weighted Average Exercise Price	$ 23.18
Options Exercisable, Number of Options	1,129,621
Options Exercisable, Weighted Average Exercise Price	$ 23.18
$25.01 - 30.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 25.01
Range of Exercise Prices, maximum	$ 30.00
Options Outstanding, Number of Options	451,786
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	1 year 9 months 22 days
Options Outstanding, Weighted Average Exercise Price	$ 28.72
Options Exercisable, Number of Options	444,662
Options Exercisable, Weighted Average Exercise Price	$ 28.75
$30.01 - 40.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 30.01
Range of Exercise Prices, maximum	$ 40.00
Options Outstanding, Number of Options	839,933
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 4 months 2 days
Options Outstanding, Weighted Average Exercise Price	$ 31.71
Options Exercisable, Number of Options	641,389
Options Exercisable, Weighted Average Exercise Price	$ 31.99
$40.01 - 50.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 40.01
Range of Exercise Prices, maximum	$ 50.00
Options Outstanding, Number of Options	590,312
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 4 months 13 days
Options Outstanding, Weighted Average Exercise Price	$ 46.64
Options Exercisable, Number of Options	590,312
Options Exercisable, Weighted Average Exercise Price	$ 46.64
$50.01 - 58.07 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 50.01
Range of Exercise Prices, maximum	$ 58.07
Options Outstanding, Number of Options	149,513
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 3 months 26 days
Options Outstanding, Weighted Average Exercise Price	$ 54.20
Options Exercisable, Number of Options	149,513
Options Exercisable, Weighted Average Exercise Price	$ 54.20
$15.30 - 58.07 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, minimum	$ 15.30
Range of Exercise Prices, maximum	$ 58.07
Options Outstanding, Number of Options	3,313,356
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 7 months 28 days
Options Outstanding, Weighted Average Exercise Price	$ 31.33
Options Exercisable, Number of Options	3,102,963
Options Exercisable, Weighted Average Exercise Price	$ 31.39