Employee Benefit And Retirement Plans Employee Benefit And Retirement Plans (Other Postretirement Benefit Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation	$ 7.2	$ 0.0
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning	67.9	88.1
Service cost-benefits earned during the period	0.1	0.3	$ 1.0
Interest cost on projected benefit obligation	2.2	3.4	4.8
Defined Benefit Plan, Actuarial (Gain) Loss	3.0	(18.3)
Defined Benefit Plan, Benefits Paid	(6.1)	(5.6)
Change in post retirement plan benefits	0.3	0.0
Defined Benefit Plan, Benefit Obligation, Ending	74.6	67.9	88.1
Defined Benefit Plan, Funded Status of Plan	$ (74.6)	$ (67.9)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.75%	4.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	8.67%	8.70%
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	$ (6.4)	$ (5.8)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	(68.2)	(62.1)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(74.6)	(67.9)
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost-benefits earned during the period	0.1	0.3	1.0
Interest cost on projected benefit obligation	2.2	3.4	4.8
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5.2)	(6.6)	(6.4)
Defined Benefit Plan, Amortization of (Gains) Losses	(5.2)	(1.2)	0.0
Net periodic pension cost	$ (8.1)	$ (4.1)	$ (0.6)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.97%	4.00%	4.50%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Weighted Average Assumption in Net Periodic Benefit Cost, Effective Rate for Interest on Benefit Obligations	3.10%	4.00%	4.50%
Defined Benefit Plan, Weighted Average Assumption in Net Periodic Benefit Cost, Effective Rate for Service Cost	3.46%	4.00%	4.50%
Defined Benefit Plan, Weighted Average Assumption in Net Periodic Benefit Cost, Effective Rate for Interest on Service Cost	3.19%	4.00%	4.50%