Retirement and Other Postretirement Benefit Plans - Schedule of Benefit Obligation, Fair Value of Plan Assets, Funded Status and Amounts Recognized in the Consolidated Financial Statements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in plan assets:
Fair value of plan assets - beginning of year	$ 171.4
Fair value of plan assets - end of year	201.8	$ 171.4
Postretirement Plans
Change in benefit obligation:
Benefit obligation - beginning of year	4.4	5.3
Interest cost	0.1	0.2	$ 0.2
Plan participants’ contributions	0.2	0.1
Actuarial loss (gain)		(1.0)
Benefits and expenses paid	(0.6)	(0.2)
Benefit obligation - end of year	4.1	4.4	5.3
Change in plan assets:
Employer contributions	0.5	0.1
Plan participants’ contributions	0.2	0.1
Benefits and expenses paid	(0.7)	(0.2)
Amounts recognized in Consolidated Balance Sheets:
Current liabilities	0.5	0.5
Non-current liabilities	3.6	3.9
Total Liabilities	4.1	4.4
Amounts recognized in Accumulated Other Comprehensive Loss:
Actuarial net (loss) gain	3.3	4.3
Total amounts recognized in accumulated other comprehensive loss	3.3	4.3
European Plans | Defined Benefit Retirement Plans
Change in benefit obligation:
Benefit obligation - beginning of year	164.1	162.8
Service cost	1.0	0.8	0.8
Interest cost	4.6	5.4	6.1
Actuarial loss (gain)	6.8	27.7
Acquisitions	1.0
Termination benefits and settlements	(0.6)	(0.2)
Benefits and expenses paid	(4.6)	(5.1)
Currency translation adjustments	17.2	(27.3)
Benefit obligation - end of year	189.5	164.1	162.8
Change in plan assets:
Fair value of plan assets - beginning of year	171.4	160.4
Actual return on plan assets	12.9	40.3
Employer contributions	5.3	6.3
Benefits and expenses paid	(4.6)	(5.1)
Termination benefits and settlements	(0.6)	(0.2)
Currency translation adjustments	17.4	(30.3)
Fair value of plan assets - end of year	201.8	171.4	160.4
Amounts recognized in Consolidated Balance Sheets:
Noncurrent Assets	32.2	23.9
Current liabilities	0.3	0.4
Non-current liabilities	19.6	16.2
Total Liabilities	19.9	16.6
Amounts recognized in Accumulated Other Comprehensive Loss:
Actuarial net (loss) gain	(26.6)	(22.1)
Prior service cost	(0.1)	(0.1)
Total amounts recognized in accumulated other comprehensive loss	(26.7)	(22.2)
U.S. Plans | Defined Benefit Retirement Plans
Change in benefit obligation:
Benefit obligation - beginning of year	19.7	17.7
Service cost	1.3	1.2	1.1
Interest cost	0.6	0.6	0.5
Actuarial loss (gain)	0.1	0.2
Termination benefits and settlements	0.2	0.2
Benefits and expenses paid	(0.5)	(0.2)
Benefit obligation - end of year	21.4	19.7	$ 17.7
Change in plan assets:
Employer contributions	0.5	0.2
Benefits and expenses paid	(0.5)	(0.2)
Amounts recognized in Consolidated Balance Sheets:
Current liabilities	4.5	1.1
Non-current liabilities	16.9	18.6
Total Liabilities	21.4	19.7
Amounts recognized in Accumulated Other Comprehensive Loss:
Actuarial net (loss) gain	(3.1)	(3.8)
Total amounts recognized in accumulated other comprehensive loss	$ (3.1)	$ (3.8)