Exchange differences (net) (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Exchange differences (net) [Abstract]
Revenue with Exchange variations	R$ 12,752,765	R$ 24,008,382	R$ 16,634,809
Expenses with Exchange Variations	(15,559,237)	(23,403,326)	(12,059,995)
Total	R$ (2,806,471)	R$ 605,056	R$ 4,574,814

The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, net of tax. [Refer: Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 91
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_91_a&doctype=Standard
-URIDate 2017-03-09

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