Legal Proceedings (Details) BRL in Millions, $ in Millions	Feb. 25, 2015 USD ($)	Feb. 25, 2015 BRL	Jan. 13, 2015 USD ($)	Jan. 13, 2015 BRL	Dec. 31, 2017 USD ($)
Income Tax Examination [Line Items]
Assessments sought again entity | BRL		BRL 33.3		BRL 14.4
Accrued estimated losses					$ 1.8
Pending Litigation [Member] | Brazilian Federal Tax Authorities [Member]
Income Tax Examination [Line Items]
Assessments sought again entity	$ 10.1		$ 4.3