Employee Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Number of Participants Domestic Pension Plan	3,700
Number of Participants Postretirement Benefit Plan	1,900
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Liability	$ 95.7	$ 97.7
Deferred Compensation Expense	6.3	9.8	$ 13.4
Deferred Benefit Liability	141.5	153.2
Deferred Benefit Expense	9.7	10.8	$ 14.0
Cash Surrender Value of Life Insurance	167.0	165.6
Deferred Compensation Plan Assets	10.7	$ 8.5
Supplemental Unemployment Benefits [Abstract]
Health and Life Insurance Benefit Obligation	8.0
Income Replacement Benefit Obligation	$ 0.0