Other Operating Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Operating Expense, Net [Abstract]
Foreign currency transaction losses (gains), net		$ 9.3	$ (5.9)	$ 1.1
Restructuring charges	[1]	5.3	32.9	4.7
Environmental remediation expenses	[2]	0.9	5.6	0.0
Stock-based compensation	[3]	194.2	0.0	0.0
Other, net		12.4	16.0	14.9
Total other operating expense, net		222.1	$ 48.6	$ 20.7
2013 Stock Incentive Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense recognized		77.6
2013 Stock Incentive Plan [Member] | Deferred Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense recognized		97.4
Employer taxes related to DSUs granted		$ 19.2

[1] See Note 4 "Restructuring."

[2] Estimated environmental remediation costs recorded on an undiscounted basis for a former production facility.

[3] Represents stock-based compensation expense recognized for stock options outstanding ($77.6 million) and DSUs granted to employees at the date of the initial public offering ($97.4 million) under the 2013 Stock Incentive Plan, and employer taxes related to DSUs granted to employees at the date of the initial public offering ($19.2 million).