Income Taxes - Summary of Open Tax Years (Details)	12 Months Ended
	Dec. 31, 2019
Minimum | United States – Federal
Income Tax Contingency [Line Items]
Open tax years	2016
Minimum | United Kingdom
Income Tax Contingency [Line Items]
Open tax years	2017
Minimum | Germany
Income Tax Contingency [Line Items]
Open tax years	2012
Minimum | France
Income Tax Contingency [Line Items]
Open tax years	2016
Minimum | Australia
Income Tax Contingency [Line Items]
Open tax years	2013
Maximum | United States – Federal
Income Tax Contingency [Line Items]
Open tax years	2019
Maximum | United Kingdom
Income Tax Contingency [Line Items]
Open tax years	2019
Maximum | Germany
Income Tax Contingency [Line Items]
Open tax years	2019
Maximum | France
Income Tax Contingency [Line Items]
Open tax years	2019
Maximum | Australia
Income Tax Contingency [Line Items]
Open tax years	2019