Basis of preparation and presentation of the consolidated financial statements (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 MXN ($) Mg	Dec. 31, 2018 MXN ($) Mg
Disclosure of subsidiaries [line items]
Coke inventory \| Mg	136,541	136,541
Coke inventory, value	$ 747,000	$ 953,000
Bottom of range [Member]
Disclosure of subsidiaries [line items]
Percentage range of changes in fair value or cash flows of hedging instrument	80.00%
Top of range [Member]
Disclosure of subsidiaries [line items]
Percentage range of changes in fair value or cash flows of hedging instrument	125.00%
USD [Member]
Disclosure of subsidiaries [line items]
Average price of coke per metric tons	$ 290	$ 355
ICH (Holding Company) share in SimRep Corporation and Subsidiaries [Member]
Disclosure of subsidiaries [line items]
Percentage of equity owned	0.59%

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2019-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
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-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2019-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2019-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph 19B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2019-03-27

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration