Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of the carrying value and fair value of the Company's debt

The following table presents the carrying value and the fair value of the Company's debt.

	December 31, 2017				December 31, 2016
	Carrying Value		Fair Value (a)		Carrying Value		Fair Value (a)
2021 Senior Notes (5.25% fixed rate)	$	175.0	$	170.2	$	175.0	$	169.5
Global Revolving Credit Facilities (variable rates)	76.9		76.9		42.9		42.9
Second German Loan Agreement (2.5% fixed rate)	6.4		6.4		6.8		6.8
Total debt	$	258.3	$	253.5	$	224.7	$	219.2

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(a) Fair value for all debt instruments was estimated from Level 2 measurements.

Schedule of level 3 defined benefit pension plan assets measured at fair value

The following table summarizes the changes in Level 3 defined benefit pension plan assets measured at fair value on a recurring basis for the year ended December 31, 2017:

			Return on plan assets
	Fair Value at January 1		Attributable to Assets Held at December 31		Attributable to Assets Sold		Net Purchases/ (Settlements)		Transfers into/ (out of) Level 3		Foreign currency effects		Fair Value at December 31
Insurance contract	$	—	$	0.2	$	—	$	0.1	$	46.8	$	1.3	$	48.4