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Income taxes - examination by major tax jurisdictions (Detail) | 12 Months Ended
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Dec. 31, 2014
United States | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2010
United States | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Canada | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2005
Canada | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
China | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2009
China | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Czech Republic | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2011
Czech Republic | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
France | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2012
France | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Germany | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2007
Germany | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
India | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2008
India | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Ireland | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2010
Ireland | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Italy | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2010
Italy | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Malaysia | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2010
Malaysia | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014
Singapore | Beginning |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2010
Singapore | Ending |
Income Tax Examination [Line Items] |
Taxable years remain subject to examination | 2014

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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