Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Number of Participants Domestic Pension Plan	4,000
Number of Participants Postretirement Benefit Plan	2,200
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Liability	$ 97.7	$ 92.7
Deferred Compensation Expense	9.8	13.4	9.8
Deferred Benefit Liability	153.2	166.2
Deferred Benefit Expense	10.8	14.0	15.0
Cash Surrender Value of Life Insurance	165.6	162.3
Deferred Compensation Plan Assets	8.5	7.7
Supplemental Unemployment Benefits [Abstract]
Duration of disability benefits	24 months
Health and Life Insurance Benefit Obligation	8.0	10.5
Income Replacement Benefit Obligation	$ 0