Name:	gsh_PrepaymentsAndOtherReceivablesAbstract
Namespace Prefix:	gsh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The reversal amount of impairment loss provision of other receivables

No definition available.

Name:	gsh_ReveralsOfImpairmentLossProvisionOtherReceivables
Namespace Prefix:	gsh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The written off amount of impairment loss provision of other receivables

No definition available.

Name:	gsh_WrittenoffOnImpairmentLossProvisionOtherReceivables
Namespace Prefix:	gsh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of additional allowance for credit losses of financial assets recognised in profit or loss. [Refer: Allowance account for credit losses of financial assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_16&doctype=Standard&book=B
-URIDate 2017-03-09

Name:	ifrs-full_AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_16&doctype=Standard&book=B
-URIDate 2017-03-09