Recoverable taxes (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Recoverable taxes
Value-added tax	$ 813	$ 887
Brazilian federal contributions	808	880
Others	13	43
Total	1,634	1,810
Current	883	1,172
Non-current	$ 751	$ 638

The amount of receivables related to a value added tax.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_b&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_ValueAddedTaxReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant