Legal Proceedings (Details) R$ in Millions, $ in Millions	Mar. 22, 2018 USD ($)	Feb. 25, 2015 BRL (R$)	Feb. 25, 2015 USD ($)	Jan. 13, 2015 BRL (R$)	Jan. 13, 2015 USD ($)	Mar. 31, 2018 USD ($)
Income Tax Examination [Line Items]
Accrued estimated losses						$ 0.3
Brazilian Federal Tax Authorities [Member]
Income Tax Examination [Line Items]
Assessments sought again entity	$ 8.0	R$ 33.3	$ 10.1	R$ 14.4	$ 4.3
Reduction in principal, penalties and interest (percent)	38.00%