Income Taxes - Summary of Tax Years that Remain Subject to Examination by Major Jurisdiction (Detail)	3 Months Ended
	Mar. 31, 2019
Canada [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
France [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Minimum [Member] | United States [Member] | United States - Federal [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2015
Minimum [Member] | United States [Member] | United States - State [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2014
Minimum [Member] | Canada [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2011
Examination in progress	2014
Minimum [Member] | Germany [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2016
Examination in progress	2012
Minimum [Member] | France [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examination in progress	2015
Minimum [Member] | United Kingdom [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2017
Minimum [Member] | Philippines [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2015
Examination in progress	2016
Maximum [Member] | United States [Member] | United States - Federal [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Maximum [Member] | United States [Member] | United States - State [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Maximum [Member] | Canada [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013
Examination in progress	2017
Maximum [Member] | Germany [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Examination in progress	2015
Maximum [Member] | France [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examination in progress	2017
Maximum [Member] | United Kingdom [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Maximum [Member] | Philippines [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2018
Examination in progress	2017