Benefit Plans (Amounts Recognized in Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Current liabilities	$ (5.6)	$ (2.6)
Noncurrent liabilities	(62.0)	(83.7)
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Current liabilities	(5.0)	(1.8)
Noncurrent liabilities	(52.4)	(74.4)
Total liabilities	(57.4)	(76.2)
Other Retirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Current liabilities	(0.6)	(0.8)
Noncurrent liabilities	(9.6)	(9.3)
Total liabilities	$ (10.2)	$ (10.1)