Summary of Tax Returns Periods Subject to Examination by Federal, State and International Tax Authorities (Detail)	9 Months Ended
	Sep. 30, 2020
United States | Earliest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2016
United States | Latest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2019
Sweden | Earliest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2013
Sweden | Latest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2019
Germany | Latest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2019
Netherlands | Earliest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2013
Netherlands | Latest Tax Year
Income Tax Examination [Line Items]
Fiscal year subject to examination	2019