Employee Benefits Deferred Compensation Plan (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred Compensation Liability, Current and Noncurrent	$ 5.8	$ 5.9
Deferred Compensation Arrangement with Individual, Compensation Expense	0.9	0.5	0.2
Deferred Compensation Plan Assets	5.1	5.2
Deferred Compensation Plan Assets, Income	$ 1.0	$ 0.5	$ 0.3