Stock-Based Compensation (Number, Weighted Average Exercise Price and Weighted Average Remaining Contractual Life of Options Outstanding) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options (in shares)	444,278.000000
Weighted Average Exercise Price (in dollars per share)	$ 43.56
Weighted Average Remaining Contractual Life (Years)	3 years 4 months 27 days
$27.00 - $38.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 27.00
Range of Exercise Prices Upper Limit	$ 38.00
Number of Options (in shares)	25,857
Weighted Average Exercise Price (in dollars per share)	$ 27.70
Weighted Average Remaining Contractual Life (Years)	4 years 1 month 28 days
$38.01 - $42.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 38.01
Range of Exercise Prices Upper Limit	$ 42.00
Number of Options (in shares)	82,834
Weighted Average Exercise Price (in dollars per share)	$ 41.77
Weighted Average Remaining Contractual Life (Years)	3 years 1 month 28 days
$42.01 - $45.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 42.01
Range of Exercise Prices Upper Limit	$ 45.00
Number of Options (in shares)	221,487
Weighted Average Exercise Price (in dollars per share)	$ 43.93
Weighted Average Remaining Contractual Life (Years)	4 years 22 days
$45.01 - $50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Lower Limit	$ 45.01
Range of Exercise Prices Upper Limit	$ 50.00
Number of Options (in shares)	114,100
Weighted Average Exercise Price (in dollars per share)	$ 47.75
Weighted Average Remaining Contractual Life (Years)	2 years 1 month 25 days