Condensed consolidated statements of financial position (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Statement of financial position [abstract]
Trade accounts receivables and other due from related parties	$ 406	$ 366
Trade accounts payable and other due to related parties	$ 223	$ 201

The amount of current payables due to related parties. [Refer: Related parties [member]; Payables to related parties]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant