Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan Contributions	0.00%
Defined Benefit Plan, Contributions by Employer	$ 1.8	$ 1.9	$ 1.8
Settlement accounting adjustment		(9.0)
Defined Benefit Plan, Fair Value of Plan Assets	413.5	416.1
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(82.3)	(94.6)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	87.1	99.9	107.7	$ 78.2
Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation		35.0
Defined Benefit Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	464.4	475.0	502.7
Defined Benefit Plan, Service Cost	6.1	7.4	5.9
Defined Benefit Plan, Contributions by Employer	2.2	2.9
Unrecognized net actuarial loss (gain)	9.1
Unrecognized prior service credit	0.0
Defined Benefit Plan, Interest Cost	15.3	19.6	20.7
Defined Benefit Plan, Plan Amendments	0.0	0.0
Defined Benefit Plan, Actuarial Gain (Loss)	(18.3)	22.6
Defined Benefit Plan, Benefits Paid	(44.5)	(36.9)
Settlement accounting adjustment	0.0	7.3
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	(5.8)	(2.5)
Defined Benefit Plan, Fair Value of Plan Assets	413.5	416.1	456.9
Defined Benefit Plan, Actual Return on Plan Assets	45.8	(4.6)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(6.1)	(2.2)
Defined Benefit Plan, Funded Status of Plan	(50.9)	(58.9)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(50.9)	(58.9)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Actuarial Loss (Gain) Recognized	144.1	163.3
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service Credit (Cost) Recognized	(0.1)	(1.1)
Accumulated other comprehensive loss	144.0	162.2
Defined Benefit Plan, Amounts Recognized in Balance Sheet	93.1	103.3
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	90.0	101.3
Retiree Health and Life [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	30.3	35.0	40.8
Defined Benefit Plan, Service Cost	0.2	0.2	0.1
Defined Benefit Plan, Contributions by Employer	2.8	2.9
Unrecognized net actuarial loss (gain)	(0.3)
Unrecognized prior service credit	(0.2)
Defined Benefit Plan, Interest Cost	0.9	1.3	1.6
Defined Benefit Plan, Plan Amendments	0.0	(2.5)
Defined Benefit Plan, Actuarial Gain (Loss)	3.0	3.6
Defined Benefit Plan, Benefits Paid	(2.8)	(2.9)
Settlement accounting adjustment	0.0	1.7
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	0.0	0.0
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	$ 0.0
Defined Benefit Plan, Actual Return on Plan Assets	0.0	0.0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	0.0	0.0
Defined Benefit Plan, Funded Status of Plan	(30.3)	(35.0)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(30.3)	(35.0)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Actuarial Loss (Gain) Recognized	(2.9)	(0.2)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service Credit (Cost) Recognized	(1.8)	(2.0)
Accumulated other comprehensive loss	(4.7)	(2.2)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(35.0)	(37.2)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ (2.9)	$ (1.4)