Non-controlling interest (Schedule of Non-controlling Interest Changes) (Details) - MXN ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Non-controlling interest [Abstract]
Balance at beginning of year	$ (108,572)	$ (105,186)
Share of profits and losses for the year	(206,417)	(145)	$ 1,458,377
Share of translation effects of foreign subsidiaries	(8,380)	(3,241)
Balance at the end of the year	$ (323,369)	$ (108,572)	$ (105,186)

The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph 12
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_12_f&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 54
-Subparagraph q
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_q&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 10
-IssueDate 2018-01-01
-Paragraph 22
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=10&date=2018-03-01&anchor=para_22&doctype=Standard
-URIDate 2018-03-16

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