Income Taxes Summary of Income Tax Contingencies (Details)	12 Months Ended
	Dec. 31, 2017
Earliest Tax Year [Member] | CANADA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2009
Earliest Tax Year [Member] | MEXICO
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2007
Earliest Tax Year [Member] | RUSSIA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2015
Earliest Tax Year [Member] | SWITZERLAND
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2010
Earliest Tax Year [Member] | UNITED STATES
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2014
Latest Tax Year [Member] | CANADA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2017
Latest Tax Year [Member] | MEXICO
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2017
Latest Tax Year [Member] | RUSSIA
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2017
Latest Tax Year [Member] | SWITZERLAND
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2017
Latest Tax Year [Member] | UNITED STATES
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2017