Tax Year Returns that Remain Subject to Examination by Major Tax Jurisdiction (Detail)	12 Months Ended
	Dec. 31, 2014
Australia | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2009
Australia | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013
Canada | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2010
Canada | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013
France | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2009
France | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013
GERMANY | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2009
GERMANY | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013
Japan | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2010
Japan | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013
SWITZERLAND
Income Tax Examination [Line Items]
Open Tax Years	2013
U.K.
Income Tax Examination [Line Items]
Open Tax Years	2013
U.S. | Earliest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2007
U.S. | Latest Tax Year
Income Tax Examination [Line Items]
Open Tax Years	2013