Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity compensation expense	$ 5.7	$ 5.3
Stock appreciation rights granted	300,000
Stock appreciation rights granted, weighted average exercise price (per share)	$ 90.06
Performance contingent units	200,000
Shares Granted To Non Employee Directors	15,174
Options exercisable (shares)	1,700,000
Options exercisable, weighted average price (per share)	$ 53.54
Options, remaining term	4 years 11 months
Compensation cost not yet recognized	$ 27.7
Period for recognition	2 years