Income Taxes Tax Jurisdictions and Years Currently under Audit Exam (Details)	12 Months Ended
	Sep. 30, 2017
Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Expiration period of net operating loss carryforwards	Dec. 31, 2018
Latest Tax Year [Member]
Income Tax Examination [Line Items]
Expiration period of net operating loss carryforwards	Dec. 31, 2037
United States | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2010
United States | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2014
Belgium | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2015
Belgium | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2016
Brazil | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2011
Brazil | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2012
CANADA | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2013
CANADA | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2014
CHINA | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2008
CHINA | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2016
France | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2010
France | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2015
Germany | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2007
Germany | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2015
JAPAN
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2016
SPAIN | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2010
SPAIN | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2014
SWITZERLAND | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2011
SWITZERLAND | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2014
United Kingdom | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2011
United Kingdom | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax jurisdictions and years currently under audit exam	2014