Income Taxes - Tax Years Subject to Examination by Major Tax Jurisdiction (Details)	12 Months Ended
	Dec. 31, 2017
Earliest Tax Year | Belgium
Income Tax Examination [Line Items]
Open Years	2010
Earliest Tax Year | Brazil
Income Tax Examination [Line Items]
Open Years	2011
Earliest Tax Year | Canada
Income Tax Examination [Line Items]
Open Years	2012
Earliest Tax Year | China
Income Tax Examination [Line Items]
Open Years	2011
Earliest Tax Year | France
Income Tax Examination [Line Items]
Open Years	2011
Earliest Tax Year | Germany
Income Tax Examination [Line Items]
Open Years	2013
Earliest Tax Year | Japan
Income Tax Examination [Line Items]
Open Years	2012
Earliest Tax Year | Mexico
Income Tax Examination [Line Items]
Open Years	2012
Earliest Tax Year | Netherlands
Income Tax Examination [Line Items]
Open Years	2013
Earliest Tax Year | South Africa
Income Tax Examination [Line Items]
Open Years	2013
Earliest Tax Year | Taiwan
Income Tax Examination [Line Items]
Open Years	2012
Earliest Tax Year | United Kingdom
Income Tax Examination [Line Items]
Open Years	2008
Earliest Tax Year | United States
Income Tax Examination [Line Items]
Open Years	2015
Latest Tax Year | United Kingdom
Income Tax Examination [Line Items]
Open Years	2015