Employee Benefits (Other Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligations	4.33%	5.23%
Equity based compensation expense	$ 14.0	$ 5.8	$ 3.8
Management [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity based compensation expense	14.5	5.8	3.8
Performance Incentive Awards [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Performance and sales incentive expense	$ 16.7	$ 14.5	$ 12.3