Background and Basis of Presentation - Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Fixed rate of interest (as a percent)	5.25%	5.25%
Secured debt | German loan agreement (2.45% fixed rate) due in 32 equal quarterly installments ending September 2022
Fair Value of Financial Instruments
Fixed rate of interest (as a percent)	2.45%	2.45%
Carrying Value
Fair Value of Financial Instruments
Total debt	$ 215.3	$ 234.4
Carrying Value | Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Total debt	175.0	175.0
Carrying Value | Secured debt | Global Revolving Credit Facilities (variable rates) due December 2019
Fair Value of Financial Instruments
Total debt	32.7	51.1
Carrying Value | Secured debt | German loan agreement (2.45% fixed rate) due in 32 equal quarterly installments ending September 2022
Fair Value of Financial Instruments
Total debt	7.6	8.3
Level 2 | Fair Value
Fair Value of Financial Instruments
Total debt	215.3	229.3
Level 2 | Fair Value | Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Total debt	175.1	169.9
Level 2 | Fair Value | Secured debt | Global Revolving Credit Facilities (variable rates) due December 2019
Fair Value of Financial Instruments
Total debt	32.7	51.1
Level 2 | Fair Value | Secured debt | German loan agreement (2.45% fixed rate) due in 32 equal quarterly installments ending September 2022
Fair Value of Financial Instruments
Total debt	$ 7.5	$ 8.3