Grindrod Shipping Holdings Ltd. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	1001 - Document - Document and Entity Information	Network	*	*	http://www.grinshipping.com/role/DocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document and Entity Information [Abstract]	Abstract			grin:DocumentAndEntityInformationAbstract
4	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
5	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
6	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
7	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
8	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
9	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
10	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
11	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
12	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
13	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
14	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
15	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
16	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
17	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
18	Entity Shell Company	Concept (Yes/No)	For Period		dei:EntityShellCompany
19	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
20	Entity Ex Transition Period	Concept (Yes/No)	For Period		dei:EntityExTransitionPeriod
21	1002 - Statement - CONSOLIDATED AND COMBINED STATEMENTS OF FINANCIAL POSITION	Network	*	*	http://www.grinshipping.com/role/ConsolidatedAndCombinedStatementsOfFinancialPosition
22	Implied Table	Table	*	*	implied:Table
23	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
24	ASSETS	Abstract			ifrs-full:AssetsAbstract
25	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
26	Cash and bank balances	Concept (Monetary)	As Of	Debit	grin:CashAndBankBalances
27	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
28	Contract assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentContractAssets
29	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaymentsAndOtherCurrentAssets
30	Due from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
31	Loans to joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentReceivablesDueFromJointVentures
32	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
33	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
34	Current tax asset	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
35	Current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
36	Assets classified as held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
37	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
38	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
39	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
40	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsNonCurrent
41	Loans to joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesDueFromJointVentures
42	Ships, property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
43	Interest in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
44	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
45	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
46	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
47	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
48	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
49	LIABILITIES AND EQUITY	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
50	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
51	Bank loans	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived
52	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
53	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentContractLiabilities
54	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermOnerousContractsProvision
55	Due to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
56	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
57	Bank overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
58	Income tax payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilities
59	Current liabilities other than liabilities included in disposal groups classified as held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilitiesOtherThanLiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
60	Liabilities directly associated with assets classified as held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
61	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
62	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
63	Bank loans	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
64	Retirement benefit obligation	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentRecognisedLiabilitiesDefinedBenefitPlan
65	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayables
66	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
67	Capital and reserves	Abstract			ifrs-full:EquityAbstract
68	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
69	Parent invested capital	Concept (Monetary)	As Of	Credit	grin:ParentInvestedCapital
70	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
71	Accumulated losses	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
72	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
73	Total equity and liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
74	1003 - Statement - CONSOLIDATED AND COMBINED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME	Network	*	*	http://www.grinshipping.com/role/ConsolidatedAndCombinedStatementsOfProfitOrLossAndOtherComprehensiveIncome
75	Income statement [Table]	Table	*	*	grin:IncomeStatementTable
76	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
77	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
78	CONSOLIDATED AND COMBINED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME [Line Items]	LineItems			grin:CONSOLIDATEDANDCOMBINEDSTATEMENTSOFPROFITORLOSSANDOTHERCOMPREHENSIVEINCOMELineItems
79	Income Statement [Abstract]	Abstract			ifrs-full:IncomeStatementAbstract
80	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
81	Cost of sales	Abstract			grin:CostOfSaleAbstract
82	Voyage expenses	Concept (Monetary)	For Period	Debit	grin:VoyageExpenses
83	Vessel operating costs	Concept (Monetary)	For Period	Debit	grin:VesselOperatingCosts
84	Charter hire costs	Concept (Monetary)	For Period	Debit	grin:CharterHire
85	Depreciation and amortisation	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
86	Other expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByNature
87	Cost of ship sale	Concept (Monetary)	For Period	Debit	grin:CostOfShipSale
88	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
89	Other operating income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
90	Administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdministrativeExpense
91	Other operating expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByFunction
92	Share of losses of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
93	Impairment loss recognised on financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossOnFinancialAssets
94	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
95	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
96	Loss before taxation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
97	Income tax	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
98	Loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
99	Other comprehensive (loss) income for the year:	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
100	Items that will not be reclassified subsequently to profit or loss	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
101	Remeasurement of defined benefit obligation	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
102	Other comprehensive income that will not be reclassified to profit or loss, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
103	Items that may be reclassified subsequently to profit or loss	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
104	Exchange differences arising on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
105	Reclassification of translation reserve to profit or loss arising from loss of control of businesses	Concept (Monetary)	For Period	Debit	grin:ReclassificationOfTranslationReserveToProfitOrLossArisingFromLossOfControlOfBusinesses
106	Net fair value (loss) gain on hedging instruments entered into for cash flow hedges not subject to basis adjustment	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
107	Other comprehensive (loss) income for the year, net of income tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
108	Other comprehensive (loss) income for the year, net of income tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
109	Total comprehensive loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
110	Loss per share:	Abstract			ifrs-full:EarningsPerShareAbstract
111	Basic and diluted	Concept (Share)	For Period		ifrs-full:BasicAndDilutedEarningsLossPerShare
112	1004 - Statement - COMBINED STATEMENTS OF CHANGES IN EQUITY	Network	*	*	http://www.grinshipping.com/role/CombinedStatementsOfChangesInEquity
113	Statement [Table]	Table	*	*	us-gaap:StatementTable
114	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
115	Equity [Member]	Member			ifrs-full:EquityMember
116	Share capital [member]	Member			ifrs-full:IssuedCapitalMember
117	Share compensation reserve [member]	Member			ifrs-full:ReserveOfChangeInValueOfTimeValueOfOptionsMember
118	Hedging reserve [member]	Member			ifrs-full:ReserveOfCashFlowHedgesMember
119	Translation reserve [member]	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
120	Accumulated losses [member]	Member			ifrs-full:RetainedEarningsMember
121	Merger reserve [member]	Member			ifrs-full:MergerReserveMember
122	Parent Invested Capital [member]	Member			ifrs-full:ParentMember
123	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
124	Currently stated [member]	Member			ifrs-full:RestatedMember
125	Adjusted [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
126	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
127	Share capital, Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
128	IFRS 9 and 15 adjustment (Note 2.3)	Concept (Monetary)	For Period	Credit	grin:IFRS9And15Adjustments
129	Adjusted balance as at 1 January 2018	Concept (Monetary)	As Of	Credit	grin:EquityAdjustedBalance
130	Loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
131	Other comprehensive loss for the year, net of income tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
132	Total comprehensive loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
133	Recognition of share-based compensation from parent company	Concept (Monetary)	For Period	Credit	grin:RecognitionOfShareBasedCompensationFromParentEntity
134	Issue of ordinary shares	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
135	Recognition of share-based payments	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
136	Dividends (Note 36)	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
137	Transaction with owners, recognised directly in equity	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherContributionsByOwners
138	Share capital, Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
139	1005 - Statement - CONSOLIDATED AND COMBINED STATEMENTS OF CASH FLOWS	Network	*	*	http://www.grinshipping.com/role/ConsolidatedAndCombinedStatementsOfCashFlows
140	Implied Table	Table	*	*	implied:Table
141	Statement of Cash Flows [Abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
142	Operating activities	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
143	Loss before taxation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
144	Adjustments for:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
145	Share of losses of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
146	Net gain on disposal of businesses	Concept (Monetary)	For Period	Credit	grin:GainOnDisposalOfBusiness
147	Gain on deemed disposal of previously held joint venture interest	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
148	Gain on disposal of ships	Concept (Monetary)	For Period	Credit	grin:GainsLossesOnDisposalsOfShips
149	(Gain)/loss on disposal of plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
150	Depreciation of ships, property, plant and equipment and amortisation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
151	Impairment loss recognised on ships	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossInventories
152	Impairment loss on goodwill and intangibles	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill
153	Impairment loss net of reversals on financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
154	Impairment loss on net assets of disposal group	Concept (Monetary)	For Period	Debit	grin:ImpairmentLossRecognisedOnAssetsOfDisposalGroup
155	(Reversal of) provision for onerous contracts	Concept (Monetary)	For Period	Credit	grin:AdjustmentsForReversalOfProvisionOfOnerousContracts
156	Recognition (reversal) of share-based payments expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
157	Net gain on derivatives financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives
158	Net foreign exchange gain	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
159	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForInterestExpense
160	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForInterestIncome
161	Components of defined benefit costs recognised in profit or loss	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
162	Operating cash flows before movements in working capital and ships	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
163	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
164	Trade receivables, other receivables and prepayments	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
165	Contract assets	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseIncreaseInContractAssets
166	Trade and other payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
167	Contract liabilities	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseincreaseInContractLiabilities
168	Due from related parties	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseIncreaseInReceivablesFromRelatedParties
169	Due to related parties	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseIncreaseInPayableToRelatedParties
170	Operating cash flows before movements in ships	Concept (Monetary)	For Period	Debit	grin:CashFlowsFromusedInOperationsBeforeChangesInShips
171	Capital expenditure on ships	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseIncreaseInInvestmentsInShips
172	Proceeds from disposal of ships	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDecreaseIncreaseInDisposalOfShips
173	Net cash generated (used in) /from operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
174	Interest paid	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsOperatingActivities
175	Interest received	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsOperatingActivities
176	Income tax paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
177	Net cash flows (used in) / generated from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
178	Investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
179	Advances to related parties	Concept (Monetary)	For Period	Credit	ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
180	Repayment from related parties	Concept (Monetary)	For Period	Debit	ifrs-full:CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities
181	Net cash inflow on acquisition of assets	Concept (Monetary)	For Period	Debit	grin:CashAssumedFromAcquisition
182	Purchase of plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
183	Purchase of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
184	Proceeds from disposal of plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
185	Net proceeds from disposal of businesses (Note 41.1)	Concept (Monetary)	For Period	Debit	grin:ProceedsFromDisposalOfBusiness
186	Dividends received from joint ventures	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedFromJointVenturesClassifiedAsInvestingActivities
187	Investment in joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
188	Loan to third party	Concept (Monetary)	For Period	Credit	ifrs-full:CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities
189	Net cash generated from/(used in) investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
190	Financing activities (Note A)	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
191	Long-term interest bearing debt raised	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
192	Payment of capital portion of long term interest-bearing debt	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
193	Loans from related parties	Concept (Monetary)	For Period	Debit	ifrs-full:CashAdvancesAndLoansFromRelatedParties
194	Repayment of loans from related parties	Concept (Monetary)	For Period	Credit	ifrs-full:CashRepaymentsOfAdvancesAndLoansFromRelatedParties
195	Repayment to related parties	Concept (Monetary)	For Period	Credit	grin:RepaymentToRelatedParties
196	Restricted cash	Concept (Monetary)	For Period	Debit	grin:ProceedsPaymentsOfRestrictedCash
197	Issuance of shares (Note B)	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
198	Dividends paid	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
199	Purchase of Parent's ordinary shares for forfeitable share plan	Concept (Monetary)	For Period	Debit	grin:PaymentsForPurchaseOfOrdinarySharesForForfeitableSharePlan
200	Net cash flows (used in) generated from financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
201	Net decrease in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
202	Cash and cash equivalents at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
203	Effect of exchange rate changes on the balance of cash held in foreign currencies	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
204	Cash and cash equivalents at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
205	1006 - Statement - COMBINED STATEMENTS OF CASH FLOWS 1	Network	*	*	http://www.grinshipping.com/role/CombinedStatementsOfCashFlows1
206	Statement [Table]	Table	*	*	us-gaap:StatementTable
207	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
208	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
209	Loans from related parties [Member]	Member			grin:LoansFromRelatedPartiesMember
210	Bank loans [Member]	Member			grin:BankLoansMember
211	Due (from) to related parties [Member]	Member			grin:DueFromtoRelatedPartiesMember
212	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
213	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
214	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
215	Opening Balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
216	Financing cash flows	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
217	Investing cash flows	Concept (Monetary)	For Period	Credit	grin:IncreasedecreaseInLiabilitiesArisingFromInvestingActivitiesResultingFromFinancingCashFlows
218	Operating cash flows	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseThroughOperatingCashFlowsLiabilitiesArisingFromFinancingActivities
219	Non-cash changes	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseThroughNonCashChangesLiabilitiesArisingFromFinancingActivities
220	Other changes	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
221	Closing Balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
222	1007 - Statement - CONSOLIDATED AND COMBINED STATEMENTS OF CASH FLOWS (Additional Information)	Network	*	*	http://www.grinshipping.com/role/ConsolidatedAndCombinedStatementsOfCashFlowsAdditionalInformation
223	Statement [Table]	Table	*	*	us-gaap:StatementTable
224	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
225	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
226	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
227	Consideration transferred, acquisition-date fair value	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
228	Business Combination Issuance of Convertible Notes Converted Stock Issued	Concept (Shares)	For Period		grin:BusinessCombinationIssuanceOfConvertibleNotesConvertedStockIssued
229	1008 - Disclosure - GENERAL	Network	*	*	http://www.grinshipping.com/role/General
230	Implied Table	Table	*	*	implied:Table
231	Disclosure Of Basis Of Presentation Abstract [Abstract]	Abstract			grin:DisclosureOfBasisOfPresentationAbstractAbstract
232	GENERAL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
233	1009 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPolicies
234	Implied Table	Table	*	*	implied:Table
235	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			grin:DisclosureOfSignificantAccountingPoliciesAbstract
236	SIGNIFICANT ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
237	1010 - Disclosure - CRITICAL ACCOUNTING JUDGEMENTS AND KEY SOURCES OF ESTIMATION UNCERTAINTY	Network	*	*	http://www.grinshipping.com/role/CriticalAccountingJudgementsAndKeySourcesOfEstimationUncertainty
238	Implied Table	Table	*	*	implied:Table
239	Disclosure of changes in accounting estimates [abstract]	Abstract			ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
240	CRITICAL ACCOUNTING JUDGEMENTS AND KEY SOURCES OF ESTIMATION UNCERTAINTY	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfChangesInAccountingEstimatesExplanatory
241	1011 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagement
242	Implied Table	Table	*	*	implied:Table
243	Financial instruments financial risks and capital management [Abstract]	Abstract			grin:FinancialInstrumentsFinancialRisksAndCapitalManagementAbstract
244	FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
245	1012 - Disclosure - RELATED PARTIES TRANSACTIONS	Network	*	*	http://www.grinshipping.com/role/RelatedPartiesTransactions
246	Implied Table	Table	*	*	implied:Table
247	Disclosure of related parties transactions [Abstract]	Abstract			grin:DisclosureOfRelatedPartiesTransactionsAbstract
248	RELATED PARTIES TRANSACTIONS	Concept (Text Block (HTML))	For Period		grin:DisclosureOfRelatedPartiesTransactionsTextBlock
249	1013 - Disclosure - CASH AND BANK BALANCES INCLUDING RESTRICTED CASH.	Network	*	*	http://www.grinshipping.com/role/CashAndBankBalancesIncludingRestrictedCash
250	Implied Table	Table	*	*	implied:Table
251	Disclosure of cash and cash equivalents [Abstract]	Abstract			grin:DisclosureOfCashAndCashEquivalentsAbstract
252	Disclosure of restricted cash and cash equivalents [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRestrictedCashAndCashEquivalentsExplanatory
253	1014 - Disclosure - TRADE RECEIVABLES	Network	*	*	http://www.grinshipping.com/role/TradeReceivables
254	Implied Table	Table	*	*	implied:Table
255	Disclosure Of Trade And Other Receivables [Abstract]	Abstract			grin:DisclosureOfTradeAndOtherReceivablesAbstract
256	Disclosure of trade and other receivables [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
257	1015 - Disclosure - CONTRACT ASSETS	Network	*	*	http://www.grinshipping.com/role/ContractAssets
258	Implied Table	Table	*	*	implied:Table
259	Contract assets [abstract]	Abstract			ifrs-full:ContractAssetsAbstract
260	Disclosure Of Contract With customers Assets Explanatory	Concept (Text Block (HTML))	For Period		grin:DisclosureOfContractWithCustomersAssetsExplanatory
261	1016 - Disclosure - OTHER RECEIVABLES AND PREPAYMENTS	Network	*	*	http://www.grinshipping.com/role/OtherReceivablesAndPrepayments
262	Implied Table	Table	*	*	implied:Table
263	Disclosure of Other Receivables and Prepayments [Abstract]	Abstract			grin:DisclosureOfOtherReceivablesAndPrepaymentsAbstract
264	Disclosure of prepayments and other assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPrepaymentsAndOtherAssetsExplanatory
265	1017 - Disclosure - DUE FROM RELATED PARTIES	Network	*	*	http://www.grinshipping.com/role/DueFromRelatedParties
266	Implied Table	Table	*	*	implied:Table
267	DUE FROM RELATED PARTIES [Abstract]	Abstract			grin:DUEFROMRELATEDPARTIESAbstract
268	Disclosure of Due From Related Parties [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDueFromRelatedPartiesTextBlock
269	1018 - Disclosure - LOANS TO JOINT VENTURES	Network	*	*	http://www.grinshipping.com/role/LoansToJointVentures
270	Implied Table	Table	*	*	implied:Table
271	LOANS TO JOINT VENTURES [Abstract]	Abstract			grin:LOANSTOJOINTVENTURESAbstract
272	LOANS TO JOINT VENTURES	Concept (Text Block (HTML))	For Period		grin:DisclosureOfLoansToJointVentures
273	1019 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS	Network	*	*	http://www.grinshipping.com/role/DerivativeFinancialInstruments
274	Implied Table	Table	*	*	implied:Table
275	DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]	Abstract			grin:DERIVATIVEFINANCIALINSTRUMENTSAbstract
276	DERIVATIVE FINANCIAL INSTRUMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
277	1020 - Disclosure - INVENTORIES	Network	*	*	http://www.grinshipping.com/role/Inventories
278	Implied Table	Table	*	*	implied:Table
279	DisclosureOfInventories [Abstract]	Abstract			grin:DisclosureOfInventoriesAbstract
280	INVENTORIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
281	1021 - Disclosure - SHIPS, PROPERTY, PLANT AND EQUIPMENT	Network	*	*	http://www.grinshipping.com/role/ShipsPropertyPlantAndEquipment
282	Implied Table	Table	*	*	implied:Table
283	Disclosure Of Trade And Other Receivables Explanatory [Abstract]	Abstract			grin:DisclosureOfTradeAndOtherReceivablesExplanatoryAbstract
284	SHIPS, PROPERTY, PLANT AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
285	1022 - Disclosure - SUBSIDIARIES	Network	*	*	http://www.grinshipping.com/role/Subsidiaries
286	Implied Table	Table	*	*	implied:Table
287	Disclosure Of Significant Investments In Subsidiaries Explanatory [Abstract]	Abstract			grin:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatoryAbstract
288	Disclosure of subsidiaries [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
289	1023 - Disclosure - INTEREST IN JOINT VENTURES	Network	*	*	http://www.grinshipping.com/role/InterestInJointVentures
290	Implied Table	Table	*	*	implied:Table
291	Disclosure of detailed information about Joint venture [Abstract]	Abstract			grin:DisclosureOfDetailedInformationAboutJointVentureAbstract
292	INTEREST IN JOINT VENTURES	Concept (Text Block (HTML))	For Period		grin:DisclosureOfInterestsInJointVentures
293	1024 - Disclosure - INTANGIBLE ASSETS	Network	*	*	http://www.grinshipping.com/role/IntangibleAssets
294	Implied Table	Table	*	*	implied:Table
295	INTANGIBLE ASSETS [Abstract]	Abstract			grin:INTANGIBLEASSETSAbstract
296	Disclosure of intangible assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
297	1025 - Disclosure - GOODWILL	Network	*	*	http://www.grinshipping.com/role/Goodwill
298	Implied Table	Table	*	*	implied:Table
299	GOODWILL [Abstract]	Abstract			grin:GOODWILLAbstract
300	GOODWILL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGoodwillExplanatory
301	1026 - Disclosure - DEFERRED TAX	Network	*	*	http://www.grinshipping.com/role/DeferredTax
302	Implied Table	Table	*	*	implied:Table
303	Disclosure of deferred taxes [Abstract]	Abstract			grin:DisclosureOfDeferredTaxesAbstract
304	DEFERRED TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
305	1027 - Disclosure - BANK LOANS	Network	*	*	http://www.grinshipping.com/role/BankLoans
306	Implied Table	Table	*	*	implied:Table
307	Secured loan [Abstract]	Abstract			grin:SecuredLoanAbstract
308	BANK LOANS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
309	1028 - Disclosure - TRADE AND OTHER PAYABLES	Network	*	*	http://www.grinshipping.com/role/TradeAndOtherPayables
310	Implied Table	Table	*	*	implied:Table
311	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
312	TRADE AND OTHER PAYABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
313	1029 - Disclosure - CONTRACT LIABILITIES	Network	*	*	http://www.grinshipping.com/role/ContractLiabilities
314	Implied Table	Table	*	*	implied:Table
315	Contract liabilities [abstract]	Abstract			ifrs-full:ContractLiabilitiesAbstract
316	CONTRACT LIABILITIES	Concept (Text Block (HTML))	For Period		grin:ContractLiabilitiesTextBlock
317	1030 - Disclosure - PROVISIONS	Network	*	*	http://www.grinshipping.com/role/Provisions
318	Implied Table	Table	*	*	implied:Table
319	Provision for onerous contracts [Abstract]	Abstract			grin:ProvisionForOnerousContractsAbstract
320	PROVISIONS	Concept (Text Block (HTML))	For Period		grin:DisclosureOfOnerousContractTextBlock
321	1031 - Disclosure - DUE TO RELATED PARTIES	Network	*	*	http://www.grinshipping.com/role/DueToRelatedParties
322	Implied Table	Table	*	*	implied:Table
323	Due to related party [Abstract]	Abstract			grin:DueToRelatedPartyAbstract
324	DUE TO RELATED PARTIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
325	1032 - Disclosure - RETIREMENT BENEFIT OBLIGATION	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligation
326	Implied Table	Table	*	*	implied:Table
327	Disclosure of employee benefits [Abstract]	Abstract			grin:DisclosureOfEmployeeBenefitsAbstract
328	RETIREMENT BENEFIT OBLIGATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
329	1033 - Disclosure - SHARE CAPITAL	Network	*	*	http://www.grinshipping.com/role/ShareCapital
330	Implied Table	Table	*	*	implied:Table
331	SHARE CAPITAL AND PREMIUM [Abstract]	Abstract			grin:SHARECAPITALANDPREMIUMAbstract
332	SHARE CAPITAL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIssuedCapitalExplanatory
333	1034 - Disclosure - OTHER RESERVES	Network	*	*	http://www.grinshipping.com/role/OtherReserves
334	Implied Table	Table	*	*	implied:Table
335	Other reserves [abstract]	Abstract			ifrs-full:OtherReservesAbstract
336	OTHER RESERVES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
337	1035 - Disclosure - REVENUE	Network	*	*	http://www.grinshipping.com/role/Revenue
338	Implied Table	Table	*	*	implied:Table
339	Revenue [abstract]	Abstract			ifrs-full:RevenueAbstract
340	REVENUE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
341	1036 - Disclosure - SEGMENT INFORMATION	Network	*	*	http://www.grinshipping.com/role/SegmentInformation
342	Implied Table	Table	*	*	implied:Table
343	Disclosure of segments abstract [Abstract]	Abstract			grin:DisclosureOfSegmentsabstractAbstract
344	SEGMENT INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
345	1037 - Disclosure - OTHER OPERATING INCOME	Network	*	*	http://www.grinshipping.com/role/OtherOperatingIncome
346	Implied Table	Table	*	*	implied:Table
347	Disclosure of other operating income expense [Abstract]	Abstract			grin:DisclosureOfOtherOperatingIncomeExpenseAbstract
348	Disclosure of other operating income [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
349	1038 - Disclosure - OTHER OPERATING EXPENSES	Network	*	*	http://www.grinshipping.com/role/OtherOperatingExpenses
350	Implied Table	Table	*	*	implied:Table
351	Disclosure Of Other Operating Expense Explanatory [Abstract]	Abstract			grin:DisclosureOfOtherOperatingExpenseExplanatoryAbstract
352	Disclosure of other operating expense [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory
353	1039 - Disclosure - INTEREST INCOME	Network	*	*	http://www.grinshipping.com/role/InterestIncome
354	Implied Table	Table	*	*	implied:Table
355	Disclosure of interest income [Abstract]	Abstract			grin:DisclosureOfInterestIncomeAbstract
356	Disclosure of interest income [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestIncomeExplanatory
357	1040 - Disclosure - INTEREST EXPENSE	Network	*	*	http://www.grinshipping.com/role/InterestExpense
358	Implied Table	Table	*	*	implied:Table
359	Disclosure of interest expenses [Abstract]	Abstract			grin:DisclosureOfInterestExpensesAbstract
360	Disclosure of interest expense [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestExpenseExplanatory
361	1041 - Disclosure - LOSS BEFORE TAXATION	Network	*	*	http://www.grinshipping.com/role/LossBeforeTaxation
362	Implied Table	Table	*	*	implied:Table
363	Disclosure of loss before taxation [Abstract]	Abstract			grin:DisclosureOfLossBeforeTaxationAbstract
364	LOSS BEFORE TAXATION	Concept (Text Block (HTML))	For Period		grin:DisclosureOfProfitlossBeforeTaxTextBlock
365	1042 - Disclosure - INCOME TAX	Network	*	*	http://www.grinshipping.com/role/IncomeTax
366	Implied Table	Table	*	*	implied:Table
367	Disclosure of income tax [Abstract]	Abstract			grin:DisclosureOfIncomeTaxAbstract
368	INCOME TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
369	1043 - Disclosure - DIVIDENDS	Network	*	*	http://www.grinshipping.com/role/Dividends
370	Implied Table	Table	*	*	implied:Table
371	Disclosure of dividends [Abstract]	Abstract			grin:DisclosureOfDividendsAbstract
372	DIVIDENDS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
373	1044 - Disclosure - CONTINGENT LIABILITIES	Network	*	*	http://www.grinshipping.com/role/ContingentLiabilities
374	Implied Table	Table	*	*	implied:Table
375	Disclosure of contingent liabilities [abstract]	Abstract			ifrs-full:DisclosureOfContingentLiabilitiesAbstract
376	CONTINGENT LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfContingentLiabilitiesExplanatory
377	1045 - Disclosure - LEASES AND SHIP CHARTERS	Network	*	*	http://www.grinshipping.com/role/LeasesAndShipCharters
378	Implied Table	Table	*	*	implied:Table
379	Disclosure of leases [Abstract]	Abstract			grin:DisclosureOfLeasesAbstract
380	LEASES AND SHIP CHARTERS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfLeasesExplanatory
381	1046 - Disclosure - ASSETS CLASSIFIED AS HELD FOR SALE	Network	*	*	http://www.grinshipping.com/role/AssetsClassifiedAsHeldForSale
382	Implied Table	Table	*	*	implied:Table
383	Assets held for sale [Abstract]	Abstract			grin:AssetsHeldForSaleAbstract
384	ASSETS CLASSIFIED AS HELD FOR SALE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
385	1047 - Disclosure - COMMITMENTS	Network	*	*	http://www.grinshipping.com/role/Commitments
386	Implied Table	Table	*	*	implied:Table
387	Commitments [Abstract]	Abstract			grin:CommitmentsAbstract
388	COMMITMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsExplanatory
389	1048 - Disclosure - DISPOSALS OF BUSINESSES AND ASSET ACQUISITION	Network	*	*	http://www.grinshipping.com/role/DisposalsOfBusinessesAndAssetAcquisition
390	Implied Table	Table	*	*	implied:Table
391	Sale Of Business [Abstract]	Abstract			grin:SaleOfBusinessAbstract
392	DISPOSALS OF BUSINESSES AND ASSET ACQUISITION	Concept (Text Block (HTML))	For Period		grin:DisclosureOfSaleOfBusinessExplanatory
393	1049 - Disclosure - EARNINGS PER SHARE	Network	*	*	http://www.grinshipping.com/role/EarningsPerShare
394	Implied Table	Table	*	*	implied:Table
395	Income Statement [Abstract]	Abstract			ifrs-full:IncomeStatementAbstract
396	EARNINGS PER SHARE	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
397	1050 - Disclosure - GOING CONCERN	Network	*	*	http://www.grinshipping.com/role/GoingConcern
398	Implied Table	Table	*	*	implied:Table
399	Disclosure of going concern [Abstract]	Abstract			grin:DisclosureOfGoingConcernAbstract
400	GOING CONCERN	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGoingConcernExplanatory
401	1051 - Disclosure - EVENTS AFTER THE REPORTING PERIOD	Network	*	*	http://www.grinshipping.com/role/EventsAfterTheReportingPeriod
402	Implied Table	Table	*	*	implied:Table
403	Events after reporting date [Abstract]	Abstract			grin:EventsAfterReportingDateAbstract
404	EVENTS AFTER THE REPORTING PERIOD	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
405	1052 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesPolicies
406	Implied Table	Table	*	*	implied:Table
407	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			grin:DisclosureOfSignificantAccountingPoliciesAbstract
408	Statement of compliance	Concept (Text Block (HTML))	For Period		grin:DescriptionOfAccountingPolicyForStatementOfComplianceTextBlock
409	Description of Accounting Policy For Basis of Preparation [Text Block]	Concept (Text Block (HTML))	For Period		grin:DescriptionOfAccountingPolicyForBasisOfPreparationTextBlock
410	Application of new and revised International Financial Reporting Standards (IFRSs)	Concept (Text Block (HTML))	For Period		grin:DescriptionOfAccountingPolicyForExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTextBlock
411	New and revised International Financial Reporting Standards (IFRSs) in issue but not yet effective	Concept (Text Block (HTML))	For Period		grin:DescriptionOfAccountingPolicyForNoImpactOfInitialApplicationOfNewStandardsOrInterpretationsTextBlock
412	Basis of Consolidation	Concept (Text Block (HTML))	For Period		grin:BasisOfConsolidationTextBlock
413	Business Combinations	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
414	Financial Instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
415	Offsetting Arrangements	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory
416	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
417	Ships, Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
418	Intangible Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
419	Impairment of Tangible and Intangible Assets Excluding Goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
420	Goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory
421	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
422	Interests in Joint Ventures	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures
423	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
424	Non-current assets and disposal groups held for sale	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
425	Revenue recognition and voyage expenses	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
426	Borrowing Costs	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
427	Share-Based Payments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
428	Retirement Benefit Costs	Concept (Text Block (HTML))	For Period		grin:DescriptionOfAccountingPolicyForRetirementBenefitsTextBlock
429	Employee Leave Entitlement	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
430	Income Tax	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
431	Foreign Currency Transactions and Translation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
432	Cash and Cash Equivalents in the Statement of Cash Flows	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
433	Financial Guarantee Contracts	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialGuaranteesExplanatory
434	1053 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Tables)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesTables
435	Implied Table	Table	*	*	implied:Table
436	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			grin:DisclosureOfSignificantAccountingPoliciesAbstract
437	Disclosure And Detailed Information About Retrospective Effects On Financial Position [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureAndDetailedInformationAboutRetrospectiveEffectsOnFinancialPositionTextBlock
438	Disclosure And Detailed Information About Retrospective Effects On Profit Or Loss And Other Comprehensive Income [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureAndDetailedInformationAboutRetrospectiveEffectsOnProfitOrLossAndOtherComprehensiveIncomeTextBlock
439	Disclosure of detailed information about useful lives of property plant and equipment [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutUsefulLivesOfPropertyPlantAndEquipmentTextBlock
440	1054 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Tables)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementTables
441	Implied Table	Table	*	*	implied:Table
442	Financial instruments financial risks and capital management [Abstract]	Abstract			grin:FinancialInstrumentsFinancialRisksAndCapitalManagementAbstract
443	Disclosure of detailed information about financial instruments [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
444	Credit Quality Of Financial assets And Exposure To Credit Risk [Text Block]	Concept (Text Block (HTML))	For Period		grin:CreditQualityOfFinancialAssetsAndExposureToCreditRiskTextBlock
445	Disclosure of detailed information about Assets and liabilities in functional currency [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutAssetsAndLiabilitiesInFunctionalCurrencyTextBlock
446	Disclosure of detailed information about foreign currency basis spreads strengthens by 10 % in profit or loss [Text block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutForeignCurrencyBasisSpreadsStrengthensBy10InProfitOrLossTextBlock
447	Disclosure of detailed information about foreign currency basis spreads weaknes by 10 % in profit or loss [Text block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutForeignCurrencyBasisSpreadsWeaknesBy10InProfitOrLossTextBlock
448	Disclosure of detailed information maturity analysis for non-derivative financial liabilities [Text block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationMaturityAnalysisForNonderivativeFinancialLiabilitiesTextBlock
449	Disclosure of detailed information maturity analysis for derivative financial liabilities [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationMaturityAnalysisForDerivativeFinancialLiabilitiesTextBlock
450	Disclosure of detailed information about financial instruments measured at fair value on recuring basis [Text block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutFinancialInstrumentsMeasuredAtFairvalueOnRecuuringBasisTextBlock
451	Disclosure of detailed information significant unobservable inputs used in fair value measurement of assets [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTextBlock
452	1055 - Disclosure - RELATED PARTIES TRANSACTIONS (Tables)	Network	*	*	http://www.grinshipping.com/role/RelatedPartiesTransactionsTables
453	Implied Table	Table	*	*	implied:Table
454	Disclosure of related parties transactions [Abstract]	Abstract			grin:DisclosureOfRelatedPartiesTransactionsAbstract
455	Disclosure of detailed information about transactions between related parties [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutTransactionsBetweenRelatedPartiesTextBlock
456	1056 - Disclosure - CASH AND BANK BALANCES INCLUDING RESTRICTED CASH (Tables)	Network	*	*	http://www.grinshipping.com/role/CashAndBankBalancesIncludingRestrictedCashTables
457	Implied Table	Table	*	*	implied:Table
458	Disclosure of cash and cash equivalents [Abstract]	Abstract			grin:DisclosureOfCashAndCashEquivalentsAbstract
459	Disclosure of detailed information about cash and bank balances [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutCashAndBankBalancesTextBlock
460	1057 - Disclosure - TRADE RECEIVABLES (Tables)	Network	*	*	http://www.grinshipping.com/role/TradeReceivablesTables
461	Implied Table	Table	*	*	implied:Table
462	Disclosure Of Trade And Other Receivables [Abstract]	Abstract			grin:DisclosureOfTradeAndOtherReceivablesAbstract
463	Disclosure Of Detailed Information About Allowance For Doubtful Debts On Trade Receivables [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutAllowanceForDoubtfulDebtsOnTradeReceivablesTableTextBlock
464	Disclosure Of Detailed Information About Trade Receivables [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutTradeReceivablesTableTextBlock
465	Disclosure of detailed information about borrowings [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutBorrowingsTableTextBlock
466	1058 - Disclosure - OTHER RECEIVABLES AND PREPAYMENTS (Tables)	Network	*	*	http://www.grinshipping.com/role/OtherReceivablesAndPrepaymentsTables
467	Implied Table	Table	*	*	implied:Table
468	Disclosure of Other Receivables and Prepayments [Abstract]	Abstract			grin:DisclosureOfOtherReceivablesAndPrepaymentsAbstract
469	Disclosure of detailed information for prepayments and other receivables text block [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationForPrepaymentsAndOtherReceivablesTextBlockTableTextBlock
470	Disclosure of Detailed Information About Movement in Expected Credit Loss [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutMovementInExpectedCreditLossTableTextBlock
471	1059 - Disclosure - DUE FROM RELATED PARTIES (Tables)	Network	*	*	http://www.grinshipping.com/role/DueFromRelatedPartiesTables
472	Implied Table	Table	*	*	implied:Table
473	Disclosure of Due From Related Parties [Abstract]	Abstract			grin:DisclosureOfDueFromRelatedPartiesAbstract
474	Disclosure of detailed information about Related Party transactions Text block [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutRelatedPartyTransactionsTextBlockTextBlock
475	1060 - Disclosure - LOANS TO JOINT VENTURES (Tables)	Network	*	*	http://www.grinshipping.com/role/LoansToJointVenturesTables
476	Implied Table	Table	*	*	implied:Table
477	LOANS TO JOINT VENTURES [Abstract]	Abstract			grin:LOANSTOJOINTVENTURESAbstract
478	Disclosure of detailed information about loans to joint ventures	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutLoansToJointVentures
479	Disclosure Of Detailed Information About Loans Recognized Credit Impaired Lifetime [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutLoansRecognizedCreditImpairedLifetimeTableTextBlock
480	1061 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	Network	*	*	http://www.grinshipping.com/role/DerivativeFinancialInstrumentsTables
481	Implied Table	Table	*	*	implied:Table
482	DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]	Abstract			grin:DERIVATIVEFINANCIALINSTRUMENTSAbstract
483	Forward freight agreements and bunker swaps [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:ForwardFreightAgreementsAndBunkerSwapsTableTextBlock
484	Disclosure of Detailed Information of Outstanding Forward Freight Agreement Maturity [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationOfOutstandingForwardFreightAgreementMaturityTableTextBlock
485	Disclosure of Detailed Information of Number of Bunker Swaps [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationOfNumberOfBunkerSwapsTableTextBlock
486	1062 - Disclosure - INVENTORIES (Tables)	Network	*	*	http://www.grinshipping.com/role/InventoriesTables
487	Implied Table	Table	*	*	implied:Table
488	DisclosureOfInventories [Abstract]	Abstract			grin:DisclosureOfInventoriesAbstract
489	Disclosure of detailed information about inventories text block [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutInventoriesTextBlockTextBlock
490	Disclosure of Detailed Information of Reclassification of Ships as Inventoriestext block [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationOfReclassificationOfShipsAsInventoriestextBlockTextBlock
491	1063 - Disclosure - SHIPS, PROPERTY, PLANT AND EQUIPMENT (Tables)	Network	*	*	http://www.grinshipping.com/role/ShipsPropertyPlantAndEquipmentTables
492	Implied Table	Table	*	*	implied:Table
493	Ships property plant and equipment [Abstract]	Abstract			grin:ShipsPropertyPlantAndEquipmentAbstract
494	Disclosure of detailed information about property, plant and equipment [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
495	1064 - Disclosure - SUBSIDIARIES (Tables)	Network	*	*	http://www.grinshipping.com/role/SubsidiariesTables
496	Implied Table	Table	*	*	implied:Table
497	Disclosure Of Significant Investments In Subsidiaries Explanatory [Abstract]	Abstract			grin:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatoryAbstract
498	Disclosure Of Detailed Information About Subsidiaries In Consolidated Financial Statements [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutSubsidiariesInConsolidatedFinancialStatementsTextBlock
499	1065 - Disclosure - INTEREST IN JOINT VENTURES (Tables)	Network	*	*	http://www.grinshipping.com/role/InterestInJointVenturesTables
500	Implied Table	Table	*	*	implied:Table
501	Disclosure of detailed information about Joint venture [Abstract]	Abstract			grin:DisclosureOfDetailedInformationAboutJointVentureAbstract
502	Disclosure Of Detailed Information About joint ventures [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutJointVenturesTextBlock
503	Disclosure Of Detailed Information About interest in joint ventures [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutInterestInJointVenturesTextBlock
504	Disclosure of detailed information about Joint ventures financial statements adjusted by the group for Equity accounting [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutJointVenturesFinancialStatementsAdjustedByTheGroupForEquityAccountingTextBlock
505	1066 - Disclosure - INTANGIBLE ASSETS (Tables)	Network	*	*	http://www.grinshipping.com/role/IntangibleAssetsTables
506	Implied Table	Table	*	*	implied:Table
507	INTANGIBLE ASSETS [Abstract]	Abstract			grin:INTANGIBLEASSETSAbstract
508	Disclosure of detailed information about intangible assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
509	1067 - Disclosure - GOODWILL (Tables)	Network	*	*	http://www.grinshipping.com/role/GoodwillTables
510	Implied Table	Table	*	*	implied:Table
511	GOODWILL [Abstract]	Abstract			grin:GOODWILLAbstract
512	Disclosure of detailed information about goodwill [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutGoodwillTableTextBlock
513	Disclosure of detailed information about cost of goodwill [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutCostOfGoodwillTableTextBlock
514	1068 - Disclosure - DEFERRED TAX (Tables)	Network	*	*	http://www.grinshipping.com/role/DeferredTaxTables
515	Implied Table	Table	*	*	implied:Table
516	Disclosure of deferred taxes [Abstract]	Abstract			grin:DisclosureOfDeferredTaxesAbstract
517	Disclosure of detailed information about deferred tax liabilities and assets [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutDeferredTaxLiabilitiesAndAssetsTextBlock
518	1069 - Disclosure - BANK LOANS (Tables)	Network	*	*	http://www.grinshipping.com/role/BankLoansTables
519	Implied Table	Table	*	*	implied:Table
520	Secured loan [Abstract]	Abstract			grin:SecuredLoanAbstract
521	Schedule Of Long Term Borrowings [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:ScheduleOfLongTermBorrowingsTableTextBlock
522	1070 - Disclosure - TRADE AND OTHER PAYABLES (Tables)	Network	*	*	http://www.grinshipping.com/role/TradeAndOtherPayablesTables
523	Implied Table	Table	*	*	implied:Table
524	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
525	Disclosure of detailed information about trade and other payable [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutTradeAndOtherPayableTableTextBlock
526	1071 - Disclosure - PROVISIONS (Tables)	Network	*	*	http://www.grinshipping.com/role/ProvisionsTables
527	Implied Table	Table	*	*	implied:Table
528	Provision for onerous contracts [Abstract]	Abstract			grin:ProvisionForOnerousContractsAbstract
529	Disclosure of detailed information about provision for onerous contract [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutProvisionForOnerousContractTextBlock
530	Disclosure of detailed information about analysis of provision for onerous contract Text block [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutAnalysisOfProvisionForOnerousContractTextBlock
531	1072 - Disclosure - DUE TO RELATED PARTIES (Tables)	Network	*	*	http://www.grinshipping.com/role/DueToRelatedPartiesTables
532	Implied Table	Table	*	*	implied:Table
533	Due to related party [Abstract]	Abstract			grin:DueToRelatedPartyAbstract
534	Disclosure of detailed information about related party transactions [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutRelatedPartyTransactions
535	1073 - Disclosure - RETIREMENT BENEFIT OBLIGATION (Tables)	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligationTables
536	Implied Table	Table	*	*	implied:Table
537	Disclosure of employee benefits [Abstract]	Abstract			grin:DisclosureOfEmployeeBenefitsAbstract
538	Disclosure of net defined benefit liability (asset) [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
539	Schedule of principal actuarial assumptions used [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:ScheduleOfPrincipalActuarialAssumptionsUsedTableTextBlock
540	Disclosure of sensitivity analysis for actuarial assumptions [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
541	1074 - Disclosure - SHARE CAPITAL (Tables)	Network	*	*	http://www.grinshipping.com/role/ShareCapitalTables
542	Implied Table	Table	*	*	implied:Table
543	Changes in equity [abstract]	Abstract			ifrs-full:ChangesInEquityAbstract
544	Disclosure of detailed information about share capital and share premium [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutShareCapitalAndSharePremiumTableTextBlock
545	1075 - Disclosure - OTHER RESERVES (Tables)	Network	*	*	http://www.grinshipping.com/role/OtherReservesTables
546	Implied Table	Table	*	*	implied:Table
547	Other reserves [abstract]	Abstract			ifrs-full:OtherReservesAbstract
548	Disclosure Of Detailed Information About Other Reserves [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutOtherReservesTableTextBlock
549	Disclosure Of Detailed Information About Share Option Reserves [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutShareOptionReservesTableTextBlock
550	Disclosure of detailed information about share awards outstanding [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutShareAwardsOutstandingTableTextBlock
551	1076 - Disclosure - REVENUE (Tables)	Network	*	*	http://www.grinshipping.com/role/RevenueTables
552	Implied Table	Table	*	*	implied:Table
553	Revenue [abstract]	Abstract			ifrs-full:RevenueAbstract
554	Disclosure of Detailed Information About Timing Of Revenue [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutTimingOfRevenueTableTextBlock
555	1077 - Disclosure - SEGMENT INFORMATION (Tables)	Network	*	*	http://www.grinshipping.com/role/SegmentInformationTables
556	Implied Table	Table	*	*	implied:Table
557	Disclosure of segments abstract [Abstract]	Abstract			grin:DisclosureOfSegmentsabstractAbstract
558	Disclosure of operating segments [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
559	1078 - Disclosure - OTHER OPERATING INCOME (Tables)	Network	*	*	http://www.grinshipping.com/role/OtherOperatingIncomeTables
560	Implied Table	Table	*	*	implied:Table
561	Disclosure of other operating income expense [Abstract]	Abstract			grin:DisclosureOfOtherOperatingIncomeExpenseAbstract
562	Disclosure of detailed information for other operating income [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationForOtherOperatingIncomeTextBlock
563	1079 - Disclosure - OTHER OPERATING EXPENSES (Tables)	Network	*	*	http://www.grinshipping.com/role/OtherOperatingExpensesTables
564	Implied Table	Table	*	*	implied:Table
565	Disclosure Of Other Operating Expense Explanatory [Abstract]	Abstract			grin:DisclosureOfOtherOperatingExpenseExplanatoryAbstract
566	Disclosure of detailed information for other operating expense [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationForOtherOperatingExpenseTextBlock
567	1080 - Disclosure - INTEREST INCOME (Tables)	Network	*	*	http://www.grinshipping.com/role/InterestIncomeTables
568	Implied Table	Table	*	*	implied:Table
569	Disclosure of interest income [Abstract]	Abstract			grin:DisclosureOfInterestIncomeAbstract
570	Disclosure of detailed information for interest income [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationForInterestIncomeTextBlock
571	1081 - Disclosure - INTEREST EXPENSE (Tables)	Network	*	*	http://www.grinshipping.com/role/InterestExpenseTables
572	Implied Table	Table	*	*	implied:Table
573	Disclosure of interest expenses [Abstract]	Abstract			grin:DisclosureOfInterestExpensesAbstract
574	Disclosure of detailed information for interest expense [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationForInterestExpenseTextBlock
575	1082 - Disclosure - LOSS BEFORE TAXATION (Tables)	Network	*	*	http://www.grinshipping.com/role/LossBeforeTaxationTables
576	Implied Table	Table	*	*	implied:Table
577	Disclosure of loss before taxation [Abstract]	Abstract			grin:DisclosureOfLossBeforeTaxationAbstract
578	Disclosure of detailed information regarding adjustments to reconcile profitloss before tax [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationRegardingAdjustmentsToReconcileProfitlossBeforeTaxTextBlock
579	1083 - Disclosure - INCOME TAX (Tables)	Network	*	*	http://www.grinshipping.com/role/IncomeTaxTables
580	Implied Table	Table	*	*	implied:Table
581	Disclosure of income tax [Abstract]	Abstract			grin:DisclosureOfIncomeTaxAbstract
582	Disclosure of detailed information about adjustments for income tax expense [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutAdjustmentsForIncomeTaxExpenseTextBlock
583	Disclosure of detailed information about income tax reconciliation [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutIncomeTaxReconciliationTextBlock
584	1084 - Disclosure - LEASES AND SHIP CHARTERS (Tables)	Network	*	*	http://www.grinshipping.com/role/LeasesAndShipChartersTables
585	Implied Table	Table	*	*	implied:Table
586	Disclosure of leases [Abstract]	Abstract			grin:DisclosureOfLeasesAbstract
587	Disclosure of finance lease and operating lease by lessor [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory
588	Disclosure of finance lease and operating lease by lessee [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
589	1085 - Disclosure - ASSETS CLASSIFIED AS HELD FOR SALE (Tables)	Network	*	*	http://www.grinshipping.com/role/AssetsClassifiedAsHeldForSaleTables
590	Implied Table	Table	*	*	implied:Table
591	Assets held for sale [Abstract]	Abstract			grin:AssetsHeldForSaleAbstract
592	Disclosure of detailed information about assets and liabilities of disposal group held for sale [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutAssetsAndLiabilitiesOfDisposalGroupHeldForSaleTextBlock
593	Disclosure of assets and liabilities comprising the disposal group classified held for sale table [Table Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfAssetsAndLiabilitiesComprisingTheDisposalGroupClassifiedHeldForSaleTableTableTextBlock
594	1086 - Disclosure - COMMITMENTS (Tables)	Network	*	*	http://www.grinshipping.com/role/CommitmentsTables
595	Implied Table	Table	*	*	implied:Table
596	Commitments [Abstract]	Abstract			grin:CommitmentsAbstract
597	Disclosure of detailed information about capital commitments text block [Text Block]	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutCapitalCommitmentstextBlockTextBlock
598	1087 - Disclosure - DISPOSALS OF BUSINESSES AND ASSET ACQUISITION (Tables)	Network	*	*	http://www.grinshipping.com/role/DisposalsOfBusinessesAndAssetAcquisitionTables
599	Implied Table	Table	*	*	implied:Table
600	Sale Of Business [Abstract]	Abstract			grin:SaleOfBusinessAbstract
601	Disclosure of detailed information about Sale Of Business	Concept (Text Block (HTML))	For Period		grin:DisclosureOfDetailedInformationAboutSaleOfBusiness
602	1088 - Disclosure - EARNINGS PER SHARE (Tables)	Network	*	*	http://www.grinshipping.com/role/EarningsPerShareTables
603	Implied Table	Table	*	*	implied:Table
604	Income Statement [Abstract]	Abstract			ifrs-full:IncomeStatementAbstract
605	Description of detailed information about earnings per share	Concept (Text Block (HTML))	For Period		grin:DescriptionAndDetailedInformationAboutEarningsPerShareTableTextBlock
606	Description of impairment effects on earnings per share	Concept (Text Block (HTML))	For Period		grin:ImpairmentEffectsOnEarningPerShareTableTextBlock
607	1089 - Disclosure - GENERAL (Detail Textual)	Network	*	*	http://www.grinshipping.com/role/GeneralDetailTextual
608	Statement [Table]	Table	*	*	us-gaap:StatementTable
609	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
610	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
611	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
612	Percentage of voting equity interests acquired	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
613	Consideration transferred, acquisition-date fair value	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
614	Business Combination Issuance of Convertible Notes Converted Stock Issued	Concept (Shares)	For Period		grin:BusinessCombinationIssuanceOfConvertibleNotesConvertedStockIssued
615	1090 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesDetails
616	Statement [Table]	Table	*	*	us-gaap:StatementTable
617	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
618	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
619	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
620	Currently stated [member]	Member			ifrs-full:RestatedMember
621	Previously stated [member]	Member			ifrs-full:PreviouslyStatedMember
622	Adoption of IFRS 9 [Member]	Member			grin:AdoptionOfIFRS9Member
623	Adoption of IFRS 15 [Member]	Member			grin:AdoptionOfIFRS15Member
624	Increase (decrease) due to changes in accounting policy required by IFRSs [member]	Member			ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
625	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
626	Current assets	Abstract			us-gaap:PreconfirmationCurrentAssetsAbstract
627	Contract assets	Concept (Monetary)	As Of	Debit	ifrs-full:ContractAssets
628	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsCurrent
629	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
630	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsNonCurrent
631	Deferred tax asset	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
632	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
633	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
634	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
635	Capital and reserves	Abstract			ifrs-full:AssetsLessCurrentLiabilitiesAbstract
636	Parent invested capital	Concept (Monetary)	As Of	Credit	grin:ParentInvestedCapital
637	Accumulated losses	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
638	Additional Loss Allowance for Impairment Requirement	Concept (Monetary)	For Period	Credit	grin:AdditionalLossAllowanceForImpairmentRequirement
639	Additional Loss Allowance Impact on Deferred Tax	Concept (Monetary)	For Period	Credit	grin:AdditionalLossAllowanceImpactOnDeferredTax
640	1091 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details 1)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesDetails1
641	Statement [Table]	Table	*	*	us-gaap:StatementTable
642	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
643	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
644	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
645	Currently stated [member]	Member			ifrs-full:RestatedMember
646	Previously stated [member]	Member			ifrs-full:PreviouslyStatedMember
647	Adoption of IFRS 15 [Member]	Member			grin:AdoptionOfIFRS15Member
648	Increase (decrease) due to changes in accounting policy required by IFRSs [member]	Member			ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
649	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
650	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
651	Cost of sales	Abstract			grin:CostOfSaleAbstract
652	Travel expense	Concept (Monetary)	For Period	Debit	ifrs-full:TravelExpense
653	Charter hire	Concept (Monetary)	For Period	Debit	grin:CharterHire
654	1092 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details 2)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesDetails2
655	Statement [Table]	Table	*	*	us-gaap:StatementTable
656	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
657	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
658	Office equipment and furniture and fittings [Member]	Member			grin:OfficeEquipmentAndFurnitureAndFittingsMember
659	Plant and equipment [Member]	Member			grin:PlantAndEquipmentMember
660	Motor vehicles [member]	Member			ifrs-full:MotorVehiclesMember
661	Ships [member]	Member			ifrs-full:ShipsMember
662	Dry docking [Member]	Member			grin:DryDockingMember
663	Range [Axis]	Axis			ifrs-full:RangeAxis
664	Ranges [member]	Member			ifrs-full:RangesMember
665	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
666	Top of range [member]	Member			ifrs-full:TopOfRangeMember
667	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
668	Useful lives or depreciation rates, property, plant and equipment	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
669	1093 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/SignificantAccountingPoliciesDetailsTextual
670	Statement [Table]	Table	*	*	us-gaap:StatementTable
671	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
672	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
673	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
674	Currently stated [member]	Member			ifrs-full:RestatedMember
675	Adoption of IFRS 16 [Member]	Member			grin:AdoptionOfIFRS16Member
676	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
677	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
678	Ships [member]	Member			ifrs-full:ShipsMember
679	Dry docking [Member]	Member			grin:DryDockingMember
680	Range [Axis]	Axis			ifrs-full:RangeAxis
681	Ranges [member]	Member			ifrs-full:RangesMember
682	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
683	Top of range [member]	Member			ifrs-full:TopOfRangeMember
684	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
685	Lease liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:LeaseLiabilities
686	Right-of-use assets	Concept (Monetary)	As Of	Debit	ifrs-full:RightofuseAssets
687	Useful lives or depreciation rates, property, plant and equipment	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
688	Accumulated Losses Recognised in Lease Liability	Concept (Monetary)	For Period	Debit	grin:AccumulatedLossesRecognisedInLeaseLiability
689	1094 - Disclosure - CRITICAL ACCOUNTING JUDGEMENTS AND KEY SOURCES OF ESTIMATION UNCERTAINTY (Details Textual)	Network	*	*	http://www.grinshipping.com/role/CriticalAccountingJudgementsAndKeySourcesOfEstimationUncertaintyDetailsTextual
690	Disclosure of changes in accounting estimates [Table]	Table	*	*	ifrs-full:DisclosureOfChangesInAccountingEstimatesTable
691	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
692	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
693	Triview Shipping [Member]	Member			grin:TriviewShippingMember
694	Island Bulk Carriers [Member]	Member			grin:IslandBulkCarriersMember
695	IVS Bulk [Member]	Member			grin:IVSBulkMember
696	Maturity [axis]	Axis			ifrs-full:MaturityAxis
697	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
698	Later than one year and not later than three years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
699	Thereafter year [Member]	Member			grin:ThereafterYearMember
700	Segments [axis]	Axis			ifrs-full:SegmentsAxis
701	Segments [member]	Member			ifrs-full:SegmentsMember
702	Bulk carrier [Member]	Member			grin:BulkCarrierMember
703	Chemical tanker [Member]	Member			grin:ChemicalTankerMember
704	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
705	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
706	Provision for tax [Member]	Member			grin:ProvisionForTaxMember
707	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
708	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
709	Ships [member]	Member			ifrs-full:ShipsMember
710	Range [Axis]	Axis			ifrs-full:RangeAxis
711	Ranges [member]	Member			ifrs-full:RangesMember
712	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
713	Top of range [member]	Member			ifrs-full:TopOfRangeMember
714	Disclosure Of Changes In Accounting Estimates Explanatory [Line Items]	LineItems			ifrs-full:DisclosureOfChangesInAccountingEstimatesLineItems
715	Proportion of ownership interest in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
716	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
717	Impairment loss recognised in profit or loss, goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
718	Useful lives or depreciation rates, property, plant and equipment	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
719	Discount rate applied to cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
720	Decrease in charter rate	Concept (Percent)	As Of		grin:DecreaseInCharterRate
721	Tax effect from change in tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
722	Increase (decrease) through change in discount rate, other provisions	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangeInDiscountRateOtherProvisions
723	Allowance for Impairment Losses	Concept (Monetary)	For Period	Credit	grin:AllowanceForImpairmentLosses
724	1095 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails
725	Statement [Table]	Table	*	*	us-gaap:StatementTable
726	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
727	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
728	Derivatives [member]	Member			ifrs-full:DerivativesMember
729	Continuing and discontinued operations [axis]	Axis			ifrs-full:ContinuingAndDiscontinuedOperationsAxis
730	Aggregate continuing and discontinued operations [member]	Member			ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
731	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
732	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
733	Financial assets at amortised cost, category [member]	Member			ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
734	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
735	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
736	Financial liabilities at amortised cost, category [member]	Member			ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
737	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
738	Disclosure of financial assets [abstract]	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
739	Financial assets at amortised cost (2017: Loans and receivables)	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtAmortisedCost
740	Less: Transferred to asset of disposal group classified as held for sale (Note�39)	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsThatEntityContinuesToRecognise
741	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
742	Disclosure of financial liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
743	Amortised cost	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtAmortisedCost
744	Less: Transferred to asset of disposal group classified as held for sale (Note�39)	Concept (Monetary)	As Of	Credit	ifrs-full:AssociatedLiabilitiesThatEntityContinuesToRecognise
745	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
746	1096 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 1)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails1
747	Statement [Table]	Table	*	*	us-gaap:StatementTable
748	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
749	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
750	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
751	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
752	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
753	Contract assets [member]	Member			ifrs-full:ContractAssetsMember
754	Other Receivables [Member]	Member			grin:OtherReceivablesMember
755	Due From Related parties Member [Member]	Member			grin:DueFromRelatedPartiesMemberMember
756	Loans to Joint Venture [Member]	Member			grin:LoansToJointVentureMember
757	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
758	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
759	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
760	Internal Credit rating	Concept (Text/String)	For Period		grin:InternalCreditRating
761	12-month or lifetime ECL	Concept (Text/String)	For Period		grin:ExpectedCreditLossTerm
762	Gross carrying amount	Concept (Monetary)	As Of	Debit	grin:FinancialAssetsGross
763	Loss allowance	Concept (Monetary)	As Of	Credit	grin:FinancialAssetsLossAllowance
764	Net carrying amount	Concept (Monetary)	As Of	Debit	grin:FiancialAssetsNet
765	1097 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 2)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails2
766	Statement [Table]	Table	*	*	us-gaap:StatementTable
767	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
768	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
769	Currency axis [Axis]	Axis			grin:CurrencyaxisAxis
770	Currency [Domain]	Member			grin:CurrencyDomainDomain
771	United States dollars [Member]	Member			grin:UnitedStatesDollarsMember
772	South African rands [Member]	Member			grin:SouthAfricaRandsMember
773	Japanese yen [Member]	Member			grin:JapaneseYenMember
774	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
775	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
776	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
777	1098 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 3)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails3
778	Statement [Table]	Table	*	*	us-gaap:StatementTable
779	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
780	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
781	Currency axis [Axis]	Axis			grin:CurrencyaxisAxis
782	Currency Domain [Domain]	Member			grin:CurrencyDomainDomain
783	United States dollars [Member]	Member			grin:UnitedStatesDollarsMember
784	Japanese yen [Member]	Member			grin:JapaneseYenMember
785	South africa rands [Member]	Member			grin:SouthAfricaRandsMember
786	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
787	Impact on profit or loss in foreign currency strengthen by 10 %	Concept (Monetary)	For Period	Credit	grin:ImpactOnProfitOrLossInForeignCurrencyStrengthenBy10Percentage
788	1099 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 4)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails4
789	Statement [Table]	Table	*	*	us-gaap:StatementTable
790	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
791	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
792	Currency axis [Axis]	Axis			grin:CurrencyaxisAxis
793	Currency Domain [Domain]	Member			grin:CurrencyDomainDomain
794	United States dollars [Member]	Member			grin:UnitedStatesDollarsMember
795	South africa rands [Member]	Member			grin:SouthAfricaRandsMember
796	Japanese yen [Member]	Member			grin:JapaneseYenMember
797	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
798	Impact on profit or loss in foreign currency weakens by 10 %	Concept (Monetary)	For Period	Debit	grin:ImpactOnProfitOrLossInForeignCurrencyWeakensBy10Percentage
799	1100 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 5)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails5
800	Statement [Table]	Table	*	*	us-gaap:StatementTable
801	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
802	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
803	Non-interest bearing [Member]	Member			grin:NonInterestRateMember
804	Variable interest rate instruments [Member]	Member			grin:VariableInterestRateMember
805	Maturity [axis]	Axis			ifrs-full:MaturityAxis
806	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
807	On demand or within 1�year	Member			ifrs-full:NotLaterThanOneYearMember
808	Within 2 to 5 years	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember
809	After 5 years	Member			ifrs-full:LaterThanFiveYearsMember
810	Adjustment	Member			grin:AdjustmentInInterestRateMember
811	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
812	Disclosure of maturity analysis for Non derivative financial liabilities group interest rate [Abstract]	Abstract			grin:DisclosureOfMaturityAnalysisForNonDerivativeFinancialLiabilitiesGroupInterestRateAbstract
813	Weighted average effective interest rate	Concept (Percent)	As Of		grin:WeightedAverageEffectiveInterestRate
814	Disclosure of maturity analysis for group interest rate [Abstract]	Abstract			grin:DisclosureOfMaturityAnalysisForGroupInterestRateAbstract
815	Non-derivative financial liabilities, undiscounted cash flows	Concept (Monetary)	As Of	Credit	ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows
816	1101 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 6)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails6
817	Statement [Table]	Table	*	*	us-gaap:StatementTable
818	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
819	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
820	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
821	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
822	Gross inflow [Member]	Member			grin:GrossInflowMember
823	Gross outflow [Member]	Member			grin:GrossOutflowMember
824	Maturity [axis]	Axis			ifrs-full:MaturityAxis
825	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
826	On demand or within 1�year	Member			ifrs-full:NotLaterThanOneYearMember
827	Within 2 to 5 years	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember
828	Adjustment	Member			grin:AdjustmentInInterestRateMember
829	Credit Derivatives [Axis]	Axis			grin:CreditDerivativesAxis
830	Credit Derivatives [Domain]	Member			grin:CreditDerivativesDomain
831	Swap contract [member]	Member			ifrs-full:SwapContractMember
832	Forward freight agreements [Member]	Member			grin:ForwardFreightAgreementsMember
833	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
834	Disclosure of maturity analysis for derivative financial liabilities group interest rate [Abstract]	Abstract			grin:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesGroupInterestRateAbstract
835	Gross settled:	Abstract			grin:DisclosureOfGrossSettledAbstractAbstract
836	Derivative financial liabilities, undiscounted cash flows	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
837	1102 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 7)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails7
838	Statement [Table]	Table	*	*	us-gaap:StatementTable
839	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
840	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
841	Recurring fair value measurement [member]	Member			ifrs-full:RecurringFairValueMeasurementMember
842	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
843	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
844	Swap contract [member]	Member			ifrs-full:SwapContractMember
845	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
846	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
847	Forward freight agreements [Member]	Member			grin:ForwardFreightAgreementsMember
848	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
849	Financial Assets	Abstract			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsAbstract
850	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
851	Financial Liabilities	Abstract			ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesAbstract
852	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
853	1103 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details 8)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetails8
854	Statement [Table]	Table	*	*	us-gaap:StatementTable
855	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
856	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
857	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
858	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
859	Level 1	Member			ifrs-full:Level1OfFairValueHierarchyMember
860	Level 2	Member			ifrs-full:Level2OfFairValueHierarchyMember
861	Level 3	Member			ifrs-full:Level3OfFairValueHierarchyMember
862	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
863	Financial assets	Abstract			ifrs-full:FinancialAssetsDesignatedAsMeasuredAtFairValueAbstract
864	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
865	Financial liabilities	Abstract			grin:FinancialLiabilitiesDesignatedAsMeasuredAtFairValueAbstract
866	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
867	1104 - Disclosure - FINANCIAL INSTRUMENTS, FINANCIAL RISKS AND CAPITAL MANAGEMENT (Details Textual)	Network	*	*	http://www.grinshipping.com/role/FinancialInstrumentsFinancialRisksAndCapitalManagementDetailsTextual
868	Statement [Table]	Table	*	*	us-gaap:StatementTable
869	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
870	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
871	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
872	Increase decrease in interest rate	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseInInterestRate
873	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
874	Market price rate	Concept (Percent)	For Period		grin:MarketPriceRate
875	Increase Decrease In Shipping Market Price	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseInShippingMarketPrice
876	Increase decrease in hedging reserve in commodity price	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseInHedgingReserveInCommodityPrice
877	Commodity price rate	Concept (Percent)	As Of		grin:CommodityPriceRate
878	Increase decrease in commodity price	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseInCommodityPrice
879	Increase decrease in hedging reserve	Concept (Monetary)	As Of	Credit	grin:IncreaseDecreaseInHedgingReserve
880	1105 - Disclosure - RELATED PARTIES TRANSACTIONS (Details)	Network	*	*	http://www.grinshipping.com/role/RelatedPartiesTransactionsDetails
881	Disclosure of holding company and related parties transactions [Table]	Table	*	*	grin:DisclosureOfHoldingCompanyAndRelatedPartiesTransactionsTable
882	Range [Axis]	Axis			ifrs-full:RangeAxis
883	Ranges [member]	Member			ifrs-full:RangesMember
884	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
885	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
886	Joint ventures where entity is venturer [member]	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
887	Disclosure of holding company and related parties transactions [Line Items]	LineItems			grin:DisclosureOfHoldingCompanyAndRelatedPartiesTransactionsLineItems
888	Freight revenue from related parties	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
889	Fuel and port expenses to related parties	Concept (Monetary)	For Period	Debit	grin:FuelAndPortExpensesToRelatedPartyTransactions
890	Bunker swaps from related companies	Concept (Monetary)	For Period	Credit	grin:BunkerSwapsFromRelatedPartyTransactions
891	Guarantee fees from related parties	Concept (Monetary)	For Period	Credit	grin:GuranteeFeesFromRelatedPartyTransactions
892	Guarantee fees to related parties	Concept (Monetary)	For Period	Debit	grin:GuranteeFeesToRelatedPartyTransactions
893	Interest expense on loans from related parties	Concept (Monetary)	For Period	Debit	grin:InterestExpenseOnLoansFromRelatedPartyTransactions
894	Interest income on amounts due from related parties	Concept (Monetary)	For Period	Credit	grin:InterestIncomeOnAmountsDueFromRelatedPartyTransactions
895	Management fees to related parties	Concept (Monetary)	For Period	Debit	grin:ManagementFeesToRelatedPartyTransactions
896	Net gain on disposal of businesses	Concept (Monetary)	For Period	Credit	grin:GainOnDisposalOfBusiness
897	Overhead recovery from/ (to) related party (included in administrative expenses)	Concept (Monetary)	For Period	Debit	grin:OverheadRecoveryToRelatedPartyTransactions
898	Dividend paid to related party	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
899	Other expenses to related parties	Concept (Monetary)	For Period	Debit	grin:OtherExpenseToRelatedParty
900	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromInterest
901	Technical management fee income	Concept (Monetary)	For Period	Credit	grin:TechnicalManagementFeeIncome
902	Agency Fees from joint ventures	Concept (Monetary)	For Period	Credit	grin:AgencyFeesFromJoinVentures
903	Charter hire and other related revenue	Concept (Monetary)	For Period	Credit	grin:CharterHireAndOtherRelatedRevenue
904	Charter hire and other related expenses	Concept (Monetary)	For Period	Debit	grin:CharterHireAndOtherRelatedExpense
905	Payments on behalf of a joint venture	Concept (Monetary)	For Period	Credit	grin:PaymentsOnBehalfOfJointVenture
906	Purchase of ship from joint venture	Concept (Monetary)	For Period	Debit	grin:PurchaseOfShipFromJointVentures
907	Management fee income	Concept (Monetary)	For Period	Credit	grin:ManagementFeeIncome
908	1106 - Disclosure - RELATED PARTIES TRANSACTIONS (Details 1)	Network	*	*	http://www.grinshipping.com/role/RelatedPartiesTransactionsDetails1
909	Disclosure of holding company and related parties transactions [Table]	Table	*	*	grin:DisclosureOfHoldingCompanyAndRelatedPartiesTransactionsTable
910	Range [Axis]	Axis			ifrs-full:RangeAxis
911	Ranges [member]	Member			ifrs-full:RangesMember
912	Disclosure of holding company and related parties transactions [Line Items]	LineItems			grin:DisclosureOfHoldingCompanyAndRelatedPartiesTransactionsLineItems
913	Short-term benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
914	Share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
915	Total director's remuneration	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
916	1107 - Disclosure - CASH AND BANK BALANCES INCLUDING RESTRICTED CASH (Details)	Network	*	*	http://www.grinshipping.com/role/CashAndBankBalancesIncludingRestrictedCashDetails
917	Disclosure of cash and bank balances [Table]	Table	*	*	grin:DisclosureOfCashAndBankBalancesTable
918	Range [Axis]	Axis			ifrs-full:RangeAxis
919	Ranges [member]	Member			ifrs-full:RangesMember
920	Category of Restricted Cash [Axis]	Axis			grin:CategoryOfRestrictedCashAxis
921	Category of Restricted Cash [Domain]	Member			grin:CategoryOfRestrictedCashDomain
922	Short Term [Member]	Member			grin:ShortTermMember
923	Long Term [Member]	Member			grin:LongTermMember
924	Disclosure of cash and bank balances [Line Items]	LineItems			grin:DisclosureOfCashAndBankBalancesLineItems
925	Current Portion of Restricted Cash	Concept (Monetary)	As Of	Debit	grin:CurrentPortionOfRestrictedCash
926	Cash on hand	Concept (Monetary)	As Of	Debit	ifrs-full:CashOnHand
927	Cash at bank	Concept (Monetary)	As Of	Debit	ifrs-full:BalancesWithBanks
928	Cash and bank balances	Concept (Monetary)	As Of	Debit	grin:CashAndBankBalances
929	Less: Restricted cash, current portion	Concept (Monetary)	As Of	Debit	grin:CurrentPortionOfRestrictedCash
930	Less: Bank overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
931	Cash and Cash Equivalents Not part of Disposal Group	Concept (Monetary)	As Of	Debit	grin:CashAndCashEquivalentsNotPartOfDisposalGroup
932	Add: Cash and cash equivalents included in a disposal group held for sale (Note 39)	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale
933	Cash and cash equivalents in the statements of cash flows	Concept (Monetary)	As Of	Debit	grin:CashAndCashEquivalentsIncludedInADisposalGroupHeldForSale
934	Restricted cash	Abstract			grin:RestrictedCashCurrentAndNonCurrentAbstract
935	Current	Concept (Monetary)	As Of	Debit	grin:CashRestricted
936	Non-current	Concept (Monetary)	As Of	Debit	grin:CashNonCurrentRestricted
937	Current and Non Current	Concept (Monetary)	As Of	Debit	grin:CurrentAndNonCurrent
938	1108 - Disclosure - TRADE RECEIVABLES (Details)	Network	*	*	http://www.grinshipping.com/role/TradeReceivablesDetails
939	Statement [Table]	Table	*	*	us-gaap:StatementTable
940	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
941	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
942	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
943	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
944	Less: Loss allowance	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebtsOnTradeReceivables
945	Loss allowance	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebts
946	Included in assets of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebtsIncludedInAssetDisposalGroupHeldForSale
947	Trade Receivables Net allowances	Concept (Monetary)	As Of	Debit	grin:TradeReceivablesNetAllowances
948	Trade receivables due from the pools	Concept (Monetary)	As Of	Debit	grin:TradeReceivablesDueFromThePools
949	Forward freight agreements	Concept (Monetary)	As Of	Credit	grin:TradeReceivablesForwardFreightAgreements
950	Included in assets of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Debit	grin:ForwardFreightAgreementsIncludedInAssetDisposalGroupHeldForSale
951	Total trade receivables, net	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
952	1109 - Disclosure - TRADE RECEIVABLES (Details 1)	Network	*	*	http://www.grinshipping.com/role/TradeReceivablesDetails1
953	Statement [Table]	Table	*	*	us-gaap:StatementTable
954	Financing Receivables Period Pasts Due [Axis]	Axis			grin:FinancingReceivablesPeriodPastsDueAxis
955	Entitys total for impairment of financial assets [Domain]	Member			grin:EntitysTotalForImpairmentOfFinancialAssetsDomain
956	Financing Receivables No past Due Member [Member]	Member			grin:FinancingReceivablesNoPastDueMemberMember
957	Financing Receivables 1 to 30 Days Past Due [Member]	Member			grin:FinancingReceivables1To30DaysPastDueMember
958	Financing Receivables 31 to 60 Days Past Due [Member]	Member			grin:FinancingReceivables31To60DaysPastDueMember
959	Financing Receivables 61 to 90 Days Past Due [Member]	Member			grin:FinancingReceivables61To90DaysPastDueMember
960	Financing Receivables 91 To 120 Days Past Due [Member]	Member			grin:FinancingReceivables91To120DaysPastDueMember
961	Financing Receivable Equal To Greater Than 120 Days Past Due [Member]	Member			grin:FinancingReceivableEqualToGreaterThan120DaysPastDueMember
962	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
963	Current trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
964	1110 - Disclosure - TRADE RECEIVABLE (Details 2)	Network	*	*	http://www.grinshipping.com/role/TradeReceivableDetails2
965	Statement [Table]	Table	*	*	us-gaap:StatementTable
966	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
967	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
968	Financing Receivables Period Pasts Due [Axis]	Axis			grin:FinancingReceivablesPeriodPastsDueAxis
969	Entitys total for impairment of financial assets [Domain]	Member			grin:EntitysTotalForImpairmentOfFinancialAssetsDomain
970	1�day to 30�days	Member			grin:FinancingReceivables1To30DaysPastDueMember
971	31�days to 60�days	Member			grin:FinancingReceivables31To60DaysPastDueMember
972	61�days to 90�days	Member			grin:FinancingReceivables61To90DaysPastDueMember
973	More than 90�days	Member			grin:FinancingReceivableEqualToGreaterThan90DaysPastDueMember
974	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
975	Trade receivable not impaired	Concept (Monetary)	As Of	Debit	grin:TradeReceivablesPastDueButNotImpaired
976	1111 - Disclosure - TRADE RECEIVABLES (Details 3)	Network	*	*	http://www.grinshipping.com/role/TradeReceivablesDetails3
977	Statement [Table]	Table	*	*	us-gaap:StatementTable
978	Disposal Group Classification [Axis]	Axis			grin:DisposalGroupsClassificationAxis
979	Disposal Group Classification [Member]	Member			grin:DisposalGroupsClassificationMember
980	Discontinued Operation Held for sale [Member]	Member			grin:DiscontinuedOperationHeldForSaleMember
981	Continued Operation [Member]	Member			grin:ContinuedOperationMember
982	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
983	Balance at beginning of the year	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebts
984	Increase in allowance for doubtful debts	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForAllowanceForReversalOfDoubtfulDebts
985	Effect of foreign exchange differences	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
986	Balance at end of year	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebts
987	1112 - Disclosure - TRADE RECEIVABLES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/TradeReceivablesDetailsTextual
988	Implied Table	Table	*	*	implied:Table
989	Disclosure Of Trade And Other Receivables [Abstract]	Abstract			grin:DisclosureOfTradeAndOtherReceivablesAbstract
990	Trade receivable debtors carrying amount	Concept (Monetary)	As Of	Debit	grin:TradeReceivablesPastDueButNotImpaired
991	Allowance for Doubtful Debts on Trade Receivables	Concept (Monetary)	As Of	Credit	grin:AllowanceForDoubtfulDebtsOnTradeReceivables
992	Disclosure of Risk Profile of Trade Receivables	Concept (Text/String)	For Period		grin:DisclosureOfRiskProfileOfTradeReceivables
993	1113 - Disclosure - OTHER RECEIVABLES AND PREPAYMENTS (Details)	Network	*	*	http://www.grinshipping.com/role/OtherReceivablesAndPrepaymentsDetails
994	Statement [Table]	Table	*	*	us-gaap:StatementTable
995	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
996	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
997	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
998	Current:	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
999	Deposits	Concept (Monetary)	As Of	Debit	grin:DepositsOfOtherReceivables
1000	Prepayments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepayments
1001	Voyages in progress	Concept (Monetary)	As Of	Debit	grin:VoyagesInProgressCurrent
1002	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
1003	Other current receivables and prepayments not part of disposal group	Concept (Monetary)	As Of	Debit	grin:OtherCurrentReceivablesAndPrepaymentsNotPartOfDisposalGroup
1004	Included in assets of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Credit	grin:OtherCurrentReceivablesAndPrepaymentsIncludedInAssetsOfADisposalGroupHeldForSale
1005	Other receivables and prepayments current	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsCurrent
1006	Non-current:	Abstract			ifrs-full:NoncurrentAssetsAbstract
1007	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherReceivables
1008	Included in assets of a disposal group held for sale (Note 39)	Concept (Monetary)	As Of	Credit	grin:OtherNonCurrentReceivablesIncludedInAssetsOfDisposalGroupHeldForSale
1009	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsNonCurrent
1010	Other receivables and prepayments current and non current	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsCurrentAndNonCurrent
1011	1114 - Disclosure - OTHER RECEIVABLES AND PREPAYMENTS (Details1)	Network	*	*	http://www.grinshipping.com/role/OtherReceivablesAndPrepaymentsDetails1
1012	Statement [Table]	Table	*	*	us-gaap:StatementTable
1013	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1014	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1015	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1016	Balance	Concept (Monetary)	As Of	Debit	grin:ExpectedCreditLossCarryingValue
1017	Adjustment upon application of IFRS 9	Concept (Monetary)	For Period	Debit	grin:IncreaseDecreaseInExpectedCreditLossUponApplicationOfIFRS9
1018	Change in loss allowance due to new trade receivables originated, net of those derecognised due to settlement	Concept (Monetary)	For Period	Debit	grin:ChangeInExpectedCreditLossNetOfSettlements
1019	Amount written off	Concept (Monetary)	For Period	Debit	grin:ExpectedCreditLossAmountWrittenOff
1020	Balance	Concept (Monetary)	As Of	Debit	grin:ExpectedCreditLossCarryingValue
1021	1115 - Disclosure - DUE FROM RELATED PARTIES (Details)	Network	*	*	http://www.grinshipping.com/role/DueFromRelatedPartiesDetails
1022	Statement [Table]	Table	*	*	us-gaap:StatementTable
1023	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1024	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1025	Due from related parties [Member]	Member			ifrs-full:RelatedPartiesMember
1026	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1027	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1028	Due from joint ventures [Member]	Member			ifrs-full:JointVenturesMember
1029	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1030	Trade and other receivables [abstract]	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
1031	- non-interest bearing - trade	Concept (Monetary)	As Of	Debit	grin:TradeNonInterestBearing
1032	- non-interest bearing - non-trade	Concept (Monetary)	As Of	Debit	grin:NonTradeNonInterestBearing
1033	-interest bearing-non-trade	Concept (Monetary)	As Of	Debit	grin:NonTradeInterestBearing
1034	Due From Related Parties not part of disposal group	Concept (Monetary)	As Of	Debit	grin:DueFromRelatedPartiesNotPartOfDisposalGroup
1035	Included in assets of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Debit	grin:DueFromRelatedPartiesIncludedInAssetsOfADisposalGroupHeldForSale
1036	Receivables due from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
1037	1116 - Disclosure - DUE FROM RELATED PARTIES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/DueFromRelatedPartiesDetailsTextual
1038	Statement [Table]	Table	*	*	us-gaap:StatementTable
1039	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1040	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1041	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1042	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1043	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
1044	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1045	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1046	Due from related parties [Member]	Member			ifrs-full:RelatedPartiesMember
1047	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1048	Interest income on loans and receivables	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndReceivables
1049	Interest Rate	Concept (Percent)	As Of		grin:InterestRate
1050	1117 - Disclosure - LOANS TO JOINT VENTURES (Details)	Network	*	*	http://www.grinshipping.com/role/LoansToJointVenturesDetails
1051	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1052	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1053	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1054	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
1055	Disclosure of joint ventures [line items]	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1056	Assets	Abstract			ifrs-full:AssetsAbstract
1057	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1058	Provision for losses on joint ventures	Concept (Monetary)	As Of	Credit	grin:ProvisionForLossesOnJointVenturesCurrent
1059	Current Loans to Joint Ventures	Concept (Monetary)	As Of	Debit	grin:CurrentLoansToJointVentures
1060	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
1061	Provision for losses on joint ventures	Concept (Monetary)	As Of	Credit	grin:ProvisionForLossesOnJointVenturesNonCurrent
1062	Non Current Loans to Joint Ventures	Concept (Monetary)	As Of	Debit	grin:NonCurrentLoansToJointVentures
1063	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1064	1118 - Disclosure - LOANS TO JOINT VENTURES (Details 1)	Network	*	*	http://www.grinshipping.com/role/LoansToJointVenturesDetails1
1065	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1066	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1067	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1068	Joint ventures where entity is venturer [member]	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
1069	Disclosure of joint ventures [line items]	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1070	Balance	Concept (Monetary)	As Of	Debit	grin:ExpectedCreditLossCarryingValue
1071	Loss allowance recognised in profit or loss	Concept (Monetary)	For Period	Debit	grin:ExpectedCreditLossRecognisedInProfitAndLoss
1072	Amount written off	Concept (Monetary)	For Period	Debit	grin:ExpectedCreditLossAmountWrittenOff
1073	Balance	Concept (Monetary)	As Of	Debit	grin:ExpectedCreditLossCarryingValue
1074	1119 - Disclosure - LOANS TO JOINT VENTURES (Details textual)	Network	*	*	http://www.grinshipping.com/role/LoansToJointVenturesDetailsTextual
1075	Statement [Table]	Table	*	*	us-gaap:StatementTable
1076	Range [Axis]	Axis			ifrs-full:RangeAxis
1077	Ranges [member]	Member			ifrs-full:RangesMember
1078	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1079	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1080	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1081	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1082	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1083	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1084	Two ships [Member]	Member			grin:TwoShipsMember
1085	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1086	Loans to Joint Venture	Concept (Monetary)	As Of	Debit	grin:LoansToJointVenture
1087	Unsecured Interest Rate	Concept (Percent)	As Of		grin:UnsecuredInterestRate
1088	Unsecured Loans To Joint Ventures	Concept (Monetary)	As Of	Debit	grin:UnsecuredLoansToJointVentures
1089	Loans Repayable Period	Concept (xbrli:durationItemType)	For Period		grin:LoansRepayablePeriod
1090	Allowance for Impairement on Loan Losses	Concept (Monetary)	For Period	Credit	grin:AllowanceForImpairementOnLoanLosses
1091	1120 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details)	Network	*	*	http://www.grinshipping.com/role/DerivativeFinancialInstrumentsDetails
1092	DERIVATIVE FINANCIAL INSTRUMENTS [Table]	Table	*	*	grin:DERIVATIVEFINANCIALINSTRUMENTSTable
1093	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1094	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1095	DERIVATIVE FINANCIAL INSTRUMENTS [Line Items]	LineItems			grin:DERIVATIVEFINANCIALINSTRUMENTSLineItems
1096	Assets	Abstract			ifrs-full:AssetsAbstract
1097	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
1098	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
1099	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
1100	1121 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details1)	Network	*	*	http://www.grinshipping.com/role/DerivativeFinancialInstrumentsDetails1
1101	Statement [Table]	Table	*	*	us-gaap:StatementTable
1102	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1103	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1104	Hedging instruments [axis]	Axis			ifrs-full:HedgingInstrumentsAxis
1105	Hedging instruments [member]	Member			ifrs-full:HedgingInstrumentsMember
1106	January 2018 to March 2018, BSI�Ave, 45 days	Member			grin:DerivativeFreightContractOneMember
1107	January 2018 to March 2018, BSI�Ave, 40 days	Member			grin:DerivativeFreightContractTwoMember
1108	January 2018 to March 2018, BSI�Ave, 30 days	Member			grin:DerivativeFreightContractThreeMember
1109	January 2018 to March 2018, BSI�Ave, 90 days	Member			grin:DerivativeFreightContractFourMember
1110	January 2018 to March 2018, BHSI�Ave, 90 days	Member			grin:DerivativeFreightContractFiveMember
1111	January 2018 to March 2018, BHSI�Ave, 15 days	Member			grin:DerivativeFreightContractSixMember
1112	January 2018 to March 2018, BHSI�Ave, 30 days	Member			grin:DerivativeFreightContractSevenMember
1113	Derivative type [Axis]	Axis			grin:DerivativeTypeAxis
1114	Derivative type [Domain]	Member			grin:DerivativeTypeDomain
1115	Current Liabilities	Member			grin:DerivativeLiabilityMember
1116	Current Assets	Member			grin:DerivativeAssetMember
1117	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1118	Disclosure of detailed information about hedges [abstract]	Abstract			ifrs-full:DisclosureOfHedgeAccountingAbstract
1119	Categories of current financial [abstract]	Abstract			ifrs-full:CategoriesOfCurrentFinancialAssetsAbstract
1120	Strike Price	Concept (Monetary)	As Of	Credit	grin:DerivativeContractStrikePrice
1121	Notional value	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1122	Fair value gain (loss)	Concept (Monetary)	As Of		ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
1123	1122 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details 2)	Network	*	*	http://www.grinshipping.com/role/DerivativeFinancialInstrumentsDetails2
1124	Statement [Table]	Table	*	*	us-gaap:StatementTable
1125	Hedging instruments [axis]	Axis			ifrs-full:HedgingInstrumentsAxis
1126	Hedging instruments [member]	Member			ifrs-full:HedgingInstrumentsMember
1127	January 2019 to February 2019 MOPS 380 Bunker Swaps 457.75 Strike Rate [Member]	Member			grin:January2019ToFebruary2019MOPS380BunkerSwaps45775StrikeRateMember
1128	January 2019 MOPS 380 Bunker Swaps 419.00 Strike Rate [Member]	Member			grin:January2019MOPS380BunkerSwaps41900StrikeRateMember
1129	January 2019 MOPS 180 Bunker Swaps 425.25 Strike Rate [Member]	Member			grin:January2019MOPS180BunkerSwaps42525StrikeRateMember
1130	May 2019 MOPS 180 Bunker Swaps 403.50 Strike Rate [Member]	Member			grin:May2019MOPS180BunkerSwaps40350StrikeRateMember
1131	September 2019 MOPS 180 Bunker Swaps 377.50 Strike Rate [Member]	Member			grin:September2019MOPS180BunkerSwaps37750StrikeRateMember
1132	January 2019 to September 2019 Rott 35 Brg Bunker Swaps 338.50 Strike Rate [Member]	Member			grin:January2019ToSeptember2019Rott35BrgBunkerSwaps33850StrikeRateMember
1133	January 2019 to September 2019 MOPS 180 Bunker Swaps 368.50 Strike Rate [Member]	Member			grin:January2019ToSeptember2019MOPS180BunkerSwaps36850StrikeRateMember
1134	January 2019 to September 2019 Rott 3.5% Brg Bunker Swaps 369.75 Strike Rate [Member]	Member			grin:JanuaryToSeptember2019Rott35BrgBunkerSwaps36975StrikeRateMember
1135	January 2019 to September 2019 MOPS 180 Bunker Swaps 403.00 Strike Rate [Member]	Member			grin:January2019ToSeptember2019MOPS180BunkerSwaps40300StrikeRateMember
1136	January 2019 to March 2019 MOPS 380 Bunker Swaps 406.00 Strike Rate [Member]	Member			grin:January2019ToMarch2019MOPS380BunkerSwaps40600StrikeRateMember
1137	January 2018 to December 2018 Rott 35 Brg Bunker Swaps 326 Strike Rate [Member]	Member			grin:January2018ToDecember2018Rott35BrgBunkerSwaps326StrikeRateMember
1138	Derivative type [Axis]	Axis			grin:DerivativeTypeAxis
1139	Derivative type [Domain]	Member			grin:DerivativeTypeDomain
1140	Current Assets	Member			grin:DerivativeAssetMember
1141	Current Liabilities	Member			grin:DerivativeLiabilityMember
1142	Derivative Instruments Swaps [Axis]	Axis			grin:DerivativeInstrumentsSwapsAxis
1143	Derivative Instruments Swaps [Domain]	Member			grin:DerivativeInstrumentsSwapsDomain
1144	Bunker Swaps [Member]	Member			grin:BunkerSwapsMember
1145	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1146	Categories of current financial assets [abstract]	Abstract			ifrs-full:CategoriesOfCurrentFinancialAssetsAbstract
1147	Disclosure of detailed information about hedges [abstract]	Abstract			ifrs-full:DisclosureOfHedgeAccountingAbstract
1148	Strike Price	Concept (Monetary)	As Of	Credit	grin:DerivativeContractStrikePrice
1149	Quantity	Concept (num:massItemType)	As Of		grin:DerivativeNonMonetaryNotionalAmountQuantity
1150	Notional value	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1151	Fair value gain	Concept (Monetary)	As Of		ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
1152	1123 - Disclosure - INVENTORIES (Details)	Network	*	*	http://www.grinshipping.com/role/InventoriesDetails
1153	Statement [Table]	Table	*	*	us-gaap:StatementTable
1154	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1155	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1156	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1157	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1158	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1159	Bunkers and other consumables at cost	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
1160	Ships recognised as inventories	Concept (Monetary)	As Of	Debit	grin:ShipsRecognisedAsInventories
1161	Ships reclassified from Ships, property, plant and equipment as inventories (Note�14)	Concept (Monetary)	As Of	Credit	grin:ReclassificationOfShipsPropertyPlantAndEquipmentAsInventories
1162	Sale of ships recognised as inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesAtFairValueLessCostsToSell
1163	Included in assets of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Debit	grin:InventoriesClassifiedAsPartOfDisposalGroupHeldForSale
1164	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1165	1124 - Disclosure - INVENTORIES (Details 1)	Network	*	*	http://www.grinshipping.com/role/InventoriesDetails1
1166	Statement [Table]	Table	*	*	us-gaap:StatementTable
1167	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1168	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1169	Cost [member]	Member			ifrs-full:AtCostMember
1170	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1171	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1172	Accumulated depreciation [member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1173	Impairment [member]	Member			ifrs-full:AccumulatedImpairmentMember
1174	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1175	Reclassified Asset as Inventories	Concept (Monetary)	As Of	Debit	grin:ReclassifiedAssetAsInventories
1176	1125 - Disclosure - INVENTORIES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/InventoriesDetailsTextual
1177	Implied Table	Table	*	*	implied:Table
1178	DisclosureOfInventories [Abstract]	Abstract			grin:DisclosureOfInventoriesAbstract
1179	Purchase Consideration	Concept (Monetary)	For Period	Credit	grin:PurchaseConsideration
1180	1126 - Disclosure - SHIPS, PROPERTY, PLANT AND EQUIPMENT (Details)	Network	*	*	http://www.grinshipping.com/role/ShipsPropertyPlantAndEquipmentDetails
1181	Statement [Table]	Table	*	*	us-gaap:StatementTable
1182	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1183	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1184	Office equipment, furniture and fittings and motor vehicles [member]	Member			grin:OfficeEquipmentFurnitureAndFittingsAndMotorVehiclesMember
1185	Plant and equipment [Member]	Member			grin:PlantsAndEquipmentMember
1186	Plant and equipment construction in progress [Member]	Member			grin:PlantAndEquipmentConstructionInProgressMember
1187	Ships [member]	Member			ifrs-full:ShipsMember
1188	Dry docking [Member]	Member			grin:DryDockingMember
1189	Construction in progress [member]	Member			ifrs-full:ConstructionInProgressMember
1190	Free hold land and buildings [Member]	Member			grin:FreeHoldLandAndBuildingsMember
1191	Leasehold Improvements [Member]	Member			ifrs-full:LeaseholdImprovementsMember
1192	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1193	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1194	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1195	Accumulated depreciation and amortisation [member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1196	Accumulated impairment [member]	Member			ifrs-full:AccumulatedImpairmentMember
1197	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1198	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1199	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1200	Depreciation	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1201	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
1202	Transfer	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
1203	Acquired on acquisition of subsidiary (Note 41.2)	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1204	Impairment loss recognised on financial assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1205	Reclassified to disposal group held for sale (Note�39)	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
1206	Reclassification to inventories (Note 13)	Concept (Monetary)	For Period	Credit	grin:DecreaseThroughInventoriesPropertyPlantAndEquipment
1207	Effect of foreign currency exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1208	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1209	1127 - Disclosure - SUBSIDIARIES (Details)	Network	*	*	http://www.grinshipping.com/role/SubsidiariesDetails
1210	Statement [Table]	Table	*	*	us-gaap:StatementTable
1211	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1212	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1213	Unicorn Bunker Services Proprietary Limited [Member]	Member			grin:UnicornBunkerServicesProprietaryLimitedMember
1214	Comshipco Schiffahrts Agentur GmbH [Member]	Member			grin:ComshipcoSchiffahrtsAgenturGmbHMember
1215	Unicorn Calulo Shipping Services Proprietary Limited [Member]	Member			grin:UnicornCaluloShippingServicesProprietaryLimitedMember
1216	IVS Bulk Owning Pte. Ltd. [member]	Member			grin:IVSBulkOwningPteLtdMember
1217	IVS Bulk Carriers Pte. Ltd. [member]	Member			grin:VSBulkCarriersPteLtdMember
1218	IVS Bulk 430 Pte.�Ltd.[member]	Member			grin:IVSBulk430PteLtdMember
1219	IVS Bulk 462 Pte. Ltd. [member]	Member			grin:IVSBulk462PteLtdMember
1220	IVS Bulk 475 Pte. Ltd. [member]	Member			grin:IVSBulk475PteLtdMember
1221	IVS Bulk 511 Pte.�Ltd.[member]	Member			grin:IVSBulk511PteLtdMember
1222	IVS Bulk 512 Pte.�Ltd.[member]�	Member			grin:IVSBulk512PteLtdMember
1223	IVS Bulk 603 Pte.�Ltd.[member]�	Member			grin:IVSBulk603PteLtdMember
1224	IVS Bulk 609 Pte.�Ltd.�[member]	Member			grin:IVSBulk609PteLtdMember
1225	IVS Bulk 611 Pte. Ltd. [member]�	Member			grin:IVSBulk611PteLtdMember
1226	IVS Bulk 612 Pte.�Ltd.[member]	Member			grin:IVSBulk612PteLtdMember
1227	Grindrod Shipping Services UK Limited [Member]	Member			grin:GrindrodShippingServicesUKLimitedMember
1228	Unicorn Atlantic Pte. Ltd. [member]	Member			grin:UnicornAtlanticPteLtdMember
1229	Unicorn Baltic Pte. Ltd.[member]	Member			grin:UnicornBalticPteLtdMember
1230	Unicorn Ionia Pte. Ltd. [member]	Member			grin:UnicornIoniaPteLtdMember
1231	Unicorn Tanker Operations (434) Pte. Ltd. [member]	Member			grin:UnicornTankerOperations434PteLtdMember
1232	Unicorn Ross Pte. Ltd. [member]	Member			grin:UnicornRossPteLtdMember
1233	Nyathi Limited [Member]	Member			grin:NyathiLimitedMember
1234	Unicorn Caspian Pte.�Ltd.[member]	Member			grin:UnicornCaspianPteLtdMember
1235	Unicorn Marmara Pte.�Ltd.[member]�	Member			grin:UnicornMarmaraPteLtdMember
1236	Unicorn Scotia Pte.�Ltd. [member]	Member			grin:UnicornScotiaPteLtdMember
1237	Unicorn Malacca Pte.�Ltd.�[member]	Member			grin:UnicornMalaccaPteLtdMember
1238	Unicorn Bulk Carriers Ltd [member]	Member			grin:UnicornBulkCarriersLtdMember
1239	Unicorn Tankers International�Ltd [member]	Member			grin:UnicornTankersInternationalLtdMember
1240	Grindrod Maritime�LLC [member]	Member			grin:GrindrodMaritimeLLCMember
1241	IVS Bulk 707 Pte. Ltd.[Member]	Member			grin:IVSBulk707PteLtdMember
1242	IM Shipping Pte. Ltd. [member]	Member			grin:IMShippingPteLtdMember
1243	Grindrod Shipping Pte Ltd [Member]	Member			grin:GrindrodShippingPteLtdMember
1244	Grindrod Shipping South Africa [Member]	Member			grin:GrindrodShippingSouthAfricaMember
1245	IVS Bulk 3708 Pte Ltd [Member]	Member			grin:IVSBulk3708PteLtdMember
1246	IVS Bulk 3720 Pte Ltd [Member]	Member			grin:IVSBulk3720PteLtdMember
1247	Unicorn Sun Pte Ltd [Member]	Member			grin:UnicornSunPteLtdMember
1248	Unicorn Moon Pte Ltd [Member]	Member			grin:UnicornMoonPteLtdMember
1249	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1250	Name of subsidiary	Concept (Text/String)	For Period		ifrs-full:NameOfSubsidiary
1251	Principal activity	Concept (Text/String)	For Period		ifrs-full:PrincipalPlaceOfBusinessOfSubsidiary
1252	Country of incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
1253	Proportion of ownership interest and voting power held by the Group	Concept (Percent)	For Period		grin:ProportionOfOwnershipInterestAndVotingRightsInSubsidiary
1254	1128 - Disclosure - INTEREST IN JOINT VENTURES (Details)	Network	*	*	http://www.grinshipping.com/role/InterestInJointVenturesDetails
1255	Statement [Table]	Table	*	*	us-gaap:StatementTable
1256	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1257	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1258	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1259	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1260	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1261	Cost of investment in joint ventures	Concept (Monetary)	As Of	Debit	grin:CostOfInvestmentInJointVentures
1262	Share of post-acquisition loss, net of dividends received	Concept (Monetary)	As Of	Credit	grin:ShareOfPostAcquisitionLossNetOfDividendsReceived
1263	Reclassification to assets classified as held for sale	Concept (Monetary)	As Of	Debit	grin:ReclassificationToNonCurrentAssetsHeldForSale
1264	Carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
1265	1129 - Disclosure - INTEREST IN JOINT VENTURES (Details 1)	Network	*	*	http://www.grinshipping.com/role/InterestInJointVenturesDetails1
1266	Statement [Table]	Table	*	*	us-gaap:StatementTable
1267	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1268	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1269	Tri-View Shipping Pte.�Ltd. [member]	Member			grin:TriViewShippingPteLtdmemberMember
1270	IM Shipping Pte. Ltd. [member]	Member			grin:IMShippingPteLtdMember
1271	Island Bulk Carriers Pte.�Ltd. [member]	Member			grin:IslandBulkCarriersPteLtdMember
1272	IVS Bulk Pte.�Ltd. [member]	Member			grin:IVSBulkPteLtdMember
1273	Petrochemical Shipping Limited [member]	Member			grin:PetrochemicalShippingLimitedMember
1274	Leopard Tankers Pte.�Ltd. [member]	Member			grin:LeopardTankersPteLtdMember
1275	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1276	Name of joint venture	Concept (Text/String)	For Period		ifrs-full:NameOfJointVenture
1277	Principal activity	Concept (Text/String)	For Period		ifrs-full:PrincipalPlaceOfBusinessOfJointVenture
1278	Country of incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOfJointVenture
1279	Proportion of ownership interest and voting power held by the Group	Concept (Percent)	For Period		grin:ProportionOfOwnershipInterestAndVotingRightsInJointVenture
1280	Cost of investment in joint ventures	Concept (Monetary)	As Of	Debit	grin:CostOfInvestmentInJointVentures
1281	1130 - Disclosure - INTEREST IN JOINT VENTURES (Details 2)	Network	*	*	http://www.grinshipping.com/role/InterestInJointVenturesDetails2
1282	Statement [Table]	Table	*	*	us-gaap:StatementTable
1283	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1284	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1285	Tri-View Shipping Pte.�Ltd. [member]	Member			grin:TriViewShippingPteLtdmemberMember
1286	IM Shipping Pte. Ltd. [member]	Member			grin:IMShippingPteLtdMember
1287	Island Bulk Carriers Pte.�Ltd. [member]	Member			grin:IslandBulkCarriersPteLtdMember
1288	IVS Bulk Pte.�Ltd. [member]	Member			grin:IVSBulkPteLtdMember
1289	Petrochemical Shipping Limited	Member			grin:PetrochemicalShippingLtdMember
1290	Leopard Tankers Pte.�Ltd. [member]	Member			grin:LeopardTankersPteLtdMember
1291	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1292	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1293	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
1294	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1295	Non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
1296	The above amounts of assets and liabilities include the following:	Abstract			grin:AssetsAndLiablitiesAbstract
1297	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1298	Current financial liabilities (excluding trade and other payables and provisions)	Concept (Monetary)	As Of	Credit	grin:CurrentFinancialLiabilitiesExcludingTradeAndOtherPayablesAndProvision
1299	Non-current financial liabilities (excluding trade and other payables and provisions)	Concept (Monetary)	As Of	Credit	grin:NonCurrentFinancialLiabilitiesExcludingTradeAndOtherPayablesAndProvision
1300	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1301	Gross profit (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
1302	Profit (loss) for the year, representing total comprehensive income (loss) for the year	Concept (Monetary)	For Period	Credit	grin:ComprehensiveIncomeLossNetOfTax
1303	The above profit (loss) for the year include the following:	Abstract			grin:LossAbstract
1304	Depreciation and amortisation	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
1305	Impairment loss	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1306	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromInterest
1307	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
1308	Income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1309	Reconciliation of the above summarised financial information to the carrying amount of the interest in the joint venture recognised in the consolidated and combined financial statements:	Abstract			grin:ReconciliationOfSummarisedFinancialInformationOfJointVentureAccountedForUsingEquityMethodToCarryingAmountOfInterestInJointVentureAbstract
1310	Net assets of the joint venture	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1311	Net liabilities of the joint venture	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1312	Proportion of the Group's ownership interest in the joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1313	Provision for losses on joint venture	Concept (Monetary)	As Of	Credit	grin:ProvisionForLossesOnJointVentures
1314	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1315	Other adjustments	Concept (Monetary)	For Period	Debit	grin:OtherAdjustmentsInJointVenture
1316	Carrying amount of the Group's interest in the joint venture	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
1317	1131 - Disclosure - INTEREST IN JOINT VENTURES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/InterestInJointVenturesDetailsTextual
1318	Statement [Table]	Table	*	*	us-gaap:StatementTable
1319	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1320	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1321	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1322	Provision for Losses on Joint Ventures	Concept (Monetary)	As Of	Credit	grin:ProvisionForLossesOnJointVentures
1323	Unrecognised share of losses of joint ventures	Concept (Monetary)	For Period	Debit	ifrs-full:UnrecognisedShareOfLossesOfJointVentures
1324	1132 - Disclosure - INTANGIBLE ASSETS (Details)	Network	*	*	http://www.grinshipping.com/role/IntangibleAssetsDetails
1325	Statement [Table]	Table	*	*	us-gaap:StatementTable
1326	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1327	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1328	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1329	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1330	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1331	Accumulated depreciation and amortisation [member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1332	Impairment [member]	Member			ifrs-full:AccumulatedImpairmentMember
1333	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1334	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
1335	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1336	Disposal	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
1337	Amortisation	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1338	Reclassified to assets held for sale	Concept (Monetary)	As Of	Debit	grin:IntangibleAssetsReclassifiedToAssetsAsPartOfDisposalGroupHeldForSale
1339	Effect of foreign currency exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
1340	Impairment losses recognised in profit or loss	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
1341	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
1342	1133 - Disclosure - INTANGIBLE ASSETS (Details Textual)	Network	*	*	http://www.grinshipping.com/role/IntangibleAssetsDetailsTextual
1343	Statement [Table]	Table	*	*	us-gaap:StatementTable
1344	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1345	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1346	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1347	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1348	Customer-related intangible assets [member]	Member			ifrs-full:CustomerrelatedIntangibleAssetsMember
1349	Licences [member]	Member			ifrs-full:LicencesMember
1350	Range [Axis]	Axis			ifrs-full:RangeAxis
1351	Ranges [member]	Member			ifrs-full:RangesMember
1352	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1353	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1354	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1355	Impairment loss	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1356	Pre Tax Discount Rate	Concept (Percent)	As Of		grin:PreTaxDiscountRate
1357	Growth rate used to extrapolate cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1358	Intangible Assets Other than Goodwil useful Life	Concept (xbrli:durationItemType)	For Period		grin:IntangibleAssetsOtherThanGoodwilUsefulLife
1359	Amortization of Finance Lease Term	Concept (xbrli:durationItemType)	For Period		grin:AmortizationOfFinanceLeaseTerm
1360	1134 - Disclosure - GOODWILL (Details)	Network	*	*	http://www.grinshipping.com/role/GoodwillDetails
1361	Statement [Table]	Table	*	*	us-gaap:StatementTable
1362	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1363	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1364	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1365	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1366	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1367	Accumulated impairment [member]	Member			ifrs-full:AccumulatedImpairmentMember
1368	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1369	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1370	Impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1371	Effect of foreign currency exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill
1372	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1373	1135 - Disclosure - GOODWILL (Details1)	Network	*	*	http://www.grinshipping.com/role/GoodwillDetails1
1374	Statement [Table]	Table	*	*	us-gaap:StatementTable
1375	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1376	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1377	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1378	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1379	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1380	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1381	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1382	Island Trading and Shipping [Member]	Member			grin:IslandTradingAndShippingMember
1383	Unicorn Tankers, a division of Grindrod Shipping (South Africa) Pty Ltd [Member]	Member			grin:UnicornTankersADivisionOfGrindrodShippingSouthAfricaPtyLtdMember
1384	Unicorn Tankers International [Member]	Member			grin:UnicornTankersInternationalMember
1385	Service [Axis]	Axis			grin:ServiceAxis
1386	Service [Domain]	Member			grin:ServiceDomain
1387	Parcel Service [Member]	Member			grin:ParcelServiceMember
1388	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1389	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1390	1136 - Disclosure - GOODWILL (Details Textual)	Network	*	*	http://www.grinshipping.com/role/GoodwillDetailsTextual
1391	Statement [Table]	Table	*	*	us-gaap:StatementTable
1392	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1393	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1394	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1395	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1396	Unicorn Tankers a division of Grindrod Shipping South Africa PtyLtd [Member]	Member			grin:UnicornTankersADivisionOfGrindrodShippingSouthAfricaPtyLtdMember
1397	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1398	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1399	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1400	Growth rate used to extrapolate cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1401	Discount rate applied to cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1402	Impairment loss	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1403	1137 - Disclosure - DEFERRED TAX (Details)	Network	*	*	http://www.grinshipping.com/role/DeferredTaxDetails
1404	Statement [Table]	Table	*	*	us-gaap:StatementTable
1405	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1406	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1407	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1408	Deferred taxation analysed by major category:	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1409	Capital allowances	Concept (Monetary)	As Of	Credit	grin:IncreaseDecreaseThroughCapitalAllowancesDeferredTaxAssetsOrLiabilities
1410	Other timing differences	Concept (Monetary)	As Of		ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1411	Included in assets held for sale	Concept (Monetary)	As Of	Credit	grin:AssetsHeldForSaleDeferredTaxLiabilityAsset
1412	Deferred tax liability (asset)	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1413	Reconciliation of deferred taxation:	Abstract			ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract
1414	Opening balance	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1415	IFRS 9 adjustment	Concept (Monetary)	For Period	Debit	grin:DeferredTaxAssetAccountingPronouncemnetAdjustment
1416	Adjusted opening balance	Concept (Monetary)	For Period	Credit	grin:IncreasedecreaseThroughAcquisitionOfAssetsDeferredTaxLiabilityasset
1417	Credit to profit or loss for the year	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1418	Reclassified to asset held for sale	Concept (Monetary)	For Period	Credit	grin:IncreaseDecreaseThroughReclassificationsMadeToAssetsHeldForSaleDeferredTaxLiabilityAsset
1419	Exchange differences	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
1420	Closing balance	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1421	1138 - Disclosure - DEFERRED TAX (Detail Textuals)	Network	*	*	http://www.grinshipping.com/role/DeferredTaxDetailTextuals
1422	Statement [Table]	Table	*	*	us-gaap:StatementTable
1423	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1424	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1425	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1426	Temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements for which deferred tax liabilities have not been recognised	Concept (Monetary)	As Of		ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
1427	Unabsorbed tax losses	Concept (Monetary)	As Of	Debit	grin:UnabsorbedTaxLosses
1428	1139 - Disclosure - BANK LOANS (Details)	Network	*	*	http://www.grinshipping.com/role/BankLoansDetails
1429	Statement [Table]	Table	*	*	us-gaap:StatementTable
1430	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1431	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1432	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1433	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1434	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1435	Secured�at amortised cost:	Abstract			grin:SecuredAbstract
1436	Bank Loans	Concept (Monetary)	As Of	Credit	ifrs-full:SecuredBankLoansReceived
1437	Analysed between:	Abstract			grin:AnalysedBetweenAbstract
1438	Current portion	Abstract			grin:CurrentPortionAbstract
1439	Within 1 year	Concept (Monetary)	As Of	Credit	grin:CurrentPortionOfSecuredLoanReceivedIncludingDisposalGroup
1440	Less: included as part of a disposal group held for sale	Concept (Monetary)	As Of	Credit	grin:ShortTermBorrowingsClassifiedAsPartOfDisposalGroupHeldForSale
1441	Current portion of secured bank loan received including disposal group	Concept (Monetary)	As Of	Credit	grin:CurrentPortionOfSecuredBankLoanReceivedIncludingDisposalGroup
1442	Non-current portion	Abstract			grin:NonCurrentPortionAbstract
1443	Within 2 to 5 years	Concept (Monetary)	As Of	Credit	grin:NonCurrentPortionOfSecuredBankLoanReceivedIncludingDisposalGroup
1444	Less: included as part of a disposal group held for sale	Concept (Monetary)	As Of	Credit	grin:LongTermBorrowingsClassifiedAsPartOfDisposalGroupHeldForSale
1445	Non current portion of secured bank loan received	Concept (Monetary)	As Of	Credit	grin:NonCurrentPortionOfSecuredBankLoanReceived
1446	Total Bank Loan	Concept (Monetary)	As Of	Credit	grin:TotalBankLoan
1447	Interest payable (included in bank loans)	Concept (Monetary)	As Of	Credit	ifrs-full:InterestPayable
1448	1140 - Disclosure - BANK LOANS (Details Textual)	Network	*	*	http://www.grinshipping.com/role/BankLoansDetailsTextual
1449	Statement [Table]	Table	*	*	us-gaap:StatementTable
1450	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1451	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1452	Credit Facilities [Axis]	Axis			grin:CreditFacilitiesAxis
1453	Credit Facilities [Domain]	Member			grin:CreditFacilitiesDomain
1454	Previous Senior Secured Credit Facility one [Member]	Member			grin:PreviousSeniorSecuredCreditFacilityOneMember
1455	Previous Senior Secured Credit Facility [Member]	Member			grin:PreviousSeniorSecuredCreditFacilityMember
1456	Previous Senior Secured Credit Facility Two [Member]	Member			grin:PreviousSeniorSecuredCreditFacilityTwoMember
1457	Secured Term Facility [Member]	Member			grin:SecuredTermFacilityMember
1458	Senior Secured Credit Facility one [Member]	Member			grin:SeniorSecuredCreditFacilityOneMember
1459	Senior Secured Credit Facility Two [Member]	Member			grin:SeniorSecuredCreditFacilityTwoMember
1460	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1461	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1462	Variable interest rate [Member]	Member			grin:VariableInterestRateMember
1463	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1464	Restricted Cash and Cash Equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
1465	Carrying value Security charge	Concept (Monetary)	As Of	Debit	grin:CarryingValueSecurityCharge
1466	Weighted average effective interest rate	Concept (Percent)	As Of		grin:WeightedAverageEffectiveInterestRate
1467	Undrawn borrowing facilities	Concept (Monetary)	As Of	Credit	ifrs-full:UndrawnBorrowingFacilities
1468	Line of Credit Facility Available Borrowing Capacity	Concept (Monetary)	As Of	Credit	grin:LineOfCreditFacilityAvailableBorrowingCapacity
1469	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1470	Borrowing facility fee	Concept (Monetary)	As Of	Credit	grin:BorrowingFacilityFee
1471	Line credit facility	Concept (Monetary)	As Of	Credit	grin:LineCreditFacility
1472	Debt ratio	Concept (Percent)	As Of		grin:DebtRatio
1473	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1474	Line of credit facility fee	Concept (Monetary)	As Of	Credit	grin:LineOfCreditFacilityFee
1475	Secured term facility	Concept (Monetary)	As Of	Credit	grin:SecuredTermFacility
1476	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1477	1141 - Disclosure - TRADE AND OTHER PAYABLES (Details)	Network	*	*	http://www.grinshipping.com/role/TradeAndOtherPayablesDetails
1478	Statement [Table]	Table	*	*	us-gaap:StatementTable
1479	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1480	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1481	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1482	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1483	Accrued expenses	Concept (Monetary)	As Of	Credit	ifrs-full:Accruals
1484	Advances received	Concept (Monetary)	As Of	Credit	ifrs-full:Advances
1485	Others	Concept (Monetary)	As Of	Credit	ifrs-full:OtherPayables
1486	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayables
1487	Non-current trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayables
1488	Non current payable and other payables including disposal group held for sale	Concept (Monetary)	As Of	Credit	grin:NonCurrentPayableAndOtherPayablesIncludingDisposalGroupHeldForSale
1489	Less: included as part of a disposal group held for sale (Note 39)	Concept (Monetary)	As Of	Credit	grin:TradeAndOtherPayablesClassifiedAsPartOfDisposalGroupHeldForSale
1490	Current trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
1491	1142 - Disclosure - PROVISIONS (Details)	Network	*	*	http://www.grinshipping.com/role/ProvisionsDetails
1492	Implied Table	Table	*	*	implied:Table
1493	Provision for onerous contracts [Abstract]	Abstract			grin:ProvisionForOnerousContractsAbstract
1494	Provision for onerous contracts	Abstract			grin:ProvisionForContractAbstract
1495	Provision for losses on investment in joint ventures	Concept (Monetary)	As Of	Credit	grin:AllowancesForLossesOnInvestmentsInJointVenture
1496	Provision for onerous contracts	Concept (Monetary)	As Of	Credit	ifrs-full:OnerousContractsProvision
1497	Total Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermOnerousContractsProvision
1498	1143 - Disclosure - PROVISIONS (Details 1)	Network	*	*	http://www.grinshipping.com/role/ProvisionsDetails1
1499	Implied Table	Table	*	*	implied:Table
1500	Provision for onerous contracts [Abstract]	Abstract			grin:ProvisionForOnerousContractsAbstract
1501	Analysis of provision for onerous contracts:	Abstract			grin:ProvisionForContractAbstract
1502	At beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:OnerousContractsProvision
1503	Released to profit or loss	Concept (Monetary)	For Period	Credit	grin:AdjustmentsForReversalOfProvisionOfOnerousContracts
1504	At the end of the financial year	Concept (Monetary)	As Of	Credit	ifrs-full:OnerousContractsProvision
1505	1144 - Disclosure - PROVISIONS (Details textual)	Network	*	*	http://www.grinshipping.com/role/ProvisionsDetailsTextual
1506	Implied Table	Table	*	*	implied:Table
1507	Provision for onerous contracts [Abstract]	Abstract			grin:ProvisionForOnerousContractsAbstract
1508	Provision for losses on investment in joint ventures	Concept (Monetary)	As Of	Credit	grin:AllowancesForLossesOnInvestmentsInJointVenture
1509	Discount rate in onerous contract provision	Concept (Percent)	As Of		grin:DiscountRateInOnerousContractProvision
1510	1145 - Disclosure - DUE TO RELATED PARTIES (Details)	Network	*	*	http://www.grinshipping.com/role/DueToRelatedPartiesDetails
1511	Statement [Table]	Table	*	*	us-gaap:StatementTable
1512	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1513	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1514	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1515	Due to related parties�trade (Note�5)	Concept (Monetary)	As Of	Credit	grin:TradePayableToRelatedPaties
1516	Due to related parties�non-trade (Note�5)	Concept (Monetary)	As Of	Credit	grin:NonTradePayablesToRelatedParties
1517	Due to joint ventures�non-trade (Note 5)	Concept (Monetary)	As Of	Credit	grin:NonTradePayablesToJointVentures
1518	At the end of the financial year	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToRelatedParties
1519	Less: included as part of a disposal group held for sale (Note�39)	Concept (Monetary)	As Of	Credit	grin:DueToRelatedPartiesClassifiedAsPartOfDisposalGroupHeldForSale
1520	Current payables to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1521	1146 - Disclosure - RETIREMENT BENEFIT OBLIGATION (Details)	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligationDetails
1522	Statement [Table]	Table	*	*	us-gaap:StatementTable
1523	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1524	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1525	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1526	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1527	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1528	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1529	Range [Axis]	Axis			ifrs-full:RangeAxis
1530	Ranges [member]	Member			ifrs-full:RangesMember
1531	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1532	Recognised liability at beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1533	Recognised in profit or loss in the current year	Concept (Monetary)	For Period	Credit	grin:DefinedBenefitLiabilityassetRecognisedInProfitOrLoss
1534	Interest on obligation	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1535	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1536	Other	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
1537	Recognised in other comprehensive income in the current year	Concept (Monetary)	For Period	Credit	grin:DefinedBenefitLiabilityassetRecognisedInOtherComprehensiveIncome
1538	Actuarial gains	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1539	Translation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1540	Present value of unfunded obligation recognised as a liability at end of year	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1541	Less: current portion	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentRecognisedLiabilitiesDefinedBenefitPlan
1542	Long term portion	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentRecognisedLiabilitiesDefinedBenefitPlan
1543	The principal actuarial assumptions applied in the determination of fair values include:	Abstract			grin:ScheduleOfPrincipalActuarialAssumptionsUsedAbstract
1544	Health care cost inflation rate (p.a.)	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
1545	Discount rate (p.a.)	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1546	Continuation at retirement	Concept (Decimal)	As Of		ifrs-full:ActuarialAssumptionOfLifeExpectancyAfterRetirement
1547	1147 - Disclosure - RETIREMENT BENEFIT OBLIGATION (Details 1)	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligationDetails1
1548	Statement [Table]	Table	*	*	us-gaap:StatementTable
1549	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1550	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1551	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1552	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1553	Actuarial assumption of medical cost trend rates [member]	Member			ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember
1554	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1555	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1556	Current service Cost and interest cost [Member]	Member			grin:CurrentServiceCostAndInterestCostMember
1557	Accrued liability [Member]	Member			grin:AccruedLiabilityMember
1558	Range [Axis]	Axis			ifrs-full:RangeAxis
1559	Ranges [member]	Member			ifrs-full:RangesMember
1560	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1561	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1562	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1563	Percentage of reasonably possible increase decrease in actuarial assumption	Concept (Percent)	As Of		grin:PercentageOfReasonablyPossibleIncreaseDecreaseInActuarialAssumption
1564	1148 - Disclosure - RETIREMENT BENEFIT OBLIGATION (Details 2)	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligationDetails2
1565	Statement [Table]	Table	*	*	us-gaap:StatementTable
1566	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1567	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1568	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1569	Present value of unfunded obligations	Concept (Monetary)	As Of	Credit	grin:PresentValueOfUnfundedObligations
1570	Present Value of Obligations in excess of Plan Assets	Concept (Monetary)	As Of	Credit	grin:PresentValueOfObligationsInExcessOfPlanAssets
1571	1149 - Disclosure - RETIREMENT BENEFIT OBLIGATION (Details Textual)	Network	*	*	http://www.grinshipping.com/role/RetirementBenefitObligationDetailsTextual
1572	Statement [Table]	Table	*	*	us-gaap:StatementTable
1573	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1574	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1575	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1576	Medical cost trend rates	Concept (Percent)	For Period		grin:IncreaseOrDecreaseAssumedMedicalCostTrendRates
1577	Weighted average duration of defined benefit obligation	Concept (xbrli:durationItemType)	For Period		grin:WeightedAverageDefinedBenefitObligation
1578	1150 - Disclosure - SHARE CAPITAL (Details)	Network	*	*	http://www.grinshipping.com/role/ShareCapitalDetails
1579	Statement [Table]	Table	*	*	us-gaap:StatementTable
1580	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1581	Equity [Member]	Member			ifrs-full:EquityMember
1582	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1583	shares issued and fully paid up [Axis]	Axis			grin:SharesIssuedAndFullyPaidUpAxis
1584	shares issued and fully paid up [Domain]	Member			grin:SharesIssuedAndFullyPaidUpDomain
1585	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1586	Issued and paid up:	Abstract			grin:IssuedAndFullyPaidUpAbstract
1587	Number of shares, Balance	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1588	Number of shares, Issue of ordinary shares	Concept (Shares)	For Period		grin:NumberOfOrdinarySharesIssued
1589	Number of shares, Balance	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1590	Share capital, Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1591	Share capital, Issue of ordinary shares	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
1592	Share capital, Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1593	1151 - Disclosure - OTHER RESERVES (Details)	Network	*	*	http://www.grinshipping.com/role/OtherReservesDetails
1594	Statement [Table]	Table	*	*	us-gaap:StatementTable
1595	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1596	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1597	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1598	Share compensation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
1599	Hedging reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
1600	Translation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
1601	Merger reserve	Concept (Monetary)	As Of	Credit	ifrs-full:MergerReserve
1602	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
1603	1152 - Disclosure - OTHER RESERVES (Details 1)	Network	*	*	http://www.grinshipping.com/role/OtherReservesDetails1
1604	Statement [Table]	Table	*	*	us-gaap:StatementTable
1605	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1606	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1607	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1608	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
1609	Share-based payments expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1610	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
1611	1153 - Disclosure - OTHER RESERVES (Details 2)	Network	*	*	http://www.grinshipping.com/role/OtherReservesDetails2
1612	Implied Table	Table	*	*	implied:Table
1613	Other reserves [abstract]	Abstract			ifrs-full:OtherReservesAbstract
1614	Number of share awards, Outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1615	Number of share awards, Granted during the year	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1616	Number of share awards, Forfeited during the year	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1617	Number of share awards, Outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1618	Fair value at grand date, Granted during the year	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
1619	1154 - Disclosure - OTHER RESERVES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/OtherReservesDetailsTextual
1620	Statement [Table]	Table	*	*	us-gaap:StatementTable
1621	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1622	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1623	Range [Axis]	Axis			ifrs-full:RangeAxis
1624	Ranges [member]	Member			ifrs-full:RangesMember
1625	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1626	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1627	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1628	2018 FSP [Member]	Member			grin:TwoThousandEighteenFSPMember
1629	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1630	Description of vesting requirements for share-based payment arrangement	Concept (Text/String)	For Period		ifrs-full:DescriptionOfVestingRequirementsForSharebasedPaymentArrangement
1631	Issued Capital Shares	Concept (Shares)	As Of		grin:IssuedCapitalShares
1632	Increase in Number of issued Shares New Issues	Concept (Shares)	As Of		grin:IncreaseInNumberOfIssuedSharesNewIssues
1633	Share based CompensationNumber Of Shares Nonvested Subjected to Awards	Concept (Shares)	As Of		grin:ShareBasedCompensationNumberOfSharesNonvestedSubjectedToAwards
1634	Share based Payments Number of Awards Available for Grant	Concept (Shares)	As Of		grin:ShareBasedPaymentsNumberOfAwardsAvailableForGrant
1635	Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
1636	Expense from share-based payment transactions with employees	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1637	Incremental fair value granted, modified share-based payment arrangements	Concept (Monetary)	For Period		ifrs-full:IncrementalFairValueGrantedModifiedSharebasedPaymentArrangements
1638	1155 - Disclosure - REVENUE (Details)	Network	*	*	http://www.grinshipping.com/role/RevenueDetails
1639	Statement [Table]	Table	*	*	us-gaap:StatementTable
1640	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1641	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1642	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1643	Over time:	Abstract			grin:OverTimeAbstract
1644	Charter hire	Concept (Monetary)	For Period	Credit	grin:CharterHireRevenue
1645	Freight revenue	Concept (Monetary)	For Period	Credit	grin:FreightRevenue
1646	Vessel revenue	Concept (Monetary)	For Period	Credit	grin:VesselRevenue
1647	Management fees	Concept (Monetary)	For Period	Credit	grin:RevenueFromManagementFees
1648	Miscellaneous	Concept (Monetary)	For Period	Credit	grin:Miscellaneous
1649	Other	Concept (Monetary)	For Period	Credit	ifrs-full:OtherFeeAndCommissionIncome
1650	At a point in time:	Abstract			grin:AtAPointInTimeAbstract
1651	Sale of ships	Concept (Monetary)	For Period	Credit	grin:SaleOfShips
1652	Sale of bunkers and other consumables	Concept (Monetary)	For Period	Credit	grin:RevenueFromSaleOfBunkersAndOtherConsumables
1653	Ship sales	Concept (Monetary)	For Period	Credit	grin:RevenueFromSaleOfShipTotal
1654	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1655	1156 - Disclosure - REVENUE (Details Textual)	Network	*	*	http://www.grinshipping.com/role/RevenueDetailsTextual
1656	Statement [Table]	Table	*	*	us-gaap:StatementTable
1657	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1658	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1659	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1660	Percentage of Unsatisfied Revenue Expected to be Recognized	Concept (Percent)	For Period		grin:PercentageOfUnsatisfiedRevenueExpectedToBeRecognized
1661	1157 - Disclosure - SEGMENT INFORMATION (Details)	Network	*	*	http://www.grinshipping.com/role/SegmentInformationDetails
1662	Statement [Table]	Table	*	*	us-gaap:StatementTable
1663	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1664	Segments [member]	Member			ifrs-full:SegmentsMember
1665	Drybulk carrier business [Member]	Member			grin:DrybulkCarrierBusinessMember
1666	Tanker business [Member]	Member			grin:TankerBusinessMember
1667	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
1668	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1669	Unallocated Total [member]	Member			ifrs-full:UnallocatedAmountsMember
1670	Adjustments [member]	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
1671	Combined Total [Member]	Member			grin:UnalloctedCombinedSegmentMember
1672	Total [member]	Member			grin:GrossTotalMember
1673	Subsegment [Axis]	Axis			grin:SubsegmentAxis
1674	Subsegment [Domain]	Member			grin:SubsegmentDomain
1675	Handysize [Member]	Member			grin:HandysizeMember
1676	Supermax [Member]	Member			grin:SupermaxMember
1677	Others [Member]	Member			grin:OthersMember
1678	MR tanker [Member]	Member			grin:MRTankerMember
1679	Small tanker [Member]	Member			grin:SmallTankerMember
1680	Impairment loss recognised on financial assets	LineItems			us-gaap:StatementLineItems
1681	Vessel revenue	Concept (Monetary)	For Period	Credit	grin:VesselRevenues
1682	Ship sale revenue	Concept (Monetary)	For Period	Credit	grin:RevenueFromSaleOfShip
1683	Other	Concept (Monetary)	For Period	Credit	ifrs-full:OtherRevenue
1684	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1685	Voyage expenses	Concept (Monetary)	For Period	Debit	grin:VoyageExpenses
1686	Vessel operating costs	Concept (Monetary)	For Period	Debit	grin:VesselOperatingCosts
1687	Charter hire costs	Concept (Monetary)	For Period	Debit	grin:CharterHireExpenses
1688	Depreciation and amortisation	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1689	Cost of ship sale	Concept (Monetary)	For Period	Debit	grin:CostIncurredInSaleOfShip
1690	Other	Concept (Monetary)	For Period	Debit	grin:ReserveForShareBasedPayments
1691	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
1692	Gross profit (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
1693	Operating (loss) profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
1694	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromInterest
1695	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
1696	Share of losses of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
1697	Impairment loss recognised on financial assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1698	Taxation	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1699	(Loss) profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1700	Impairment loss on net assets of disposal group	Concept (Monetary)	For Period	Debit	grin:ImpairmentLossRecognisedOnAssetsOfDisposalGroup
1701	Impairment loss on goodwill and intangible assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1702	Impairment loss on ships	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossOnShips
1703	Capital expenditure	Concept (Monetary)	For Period	Debit	grin:CapitalExpenditure
1704	1158 - Disclosure - SEGMENT INFORMATION (Details Textual)	Network	*	*	http://www.grinshipping.com/role/SegmentInformationDetailsTextual
1705	Statement [Table]	Table	*	*	us-gaap:StatementTable
1706	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1707	Segments [member]	Member			ifrs-full:SegmentsMember
1708	Drybulk carrier business [Member]	Member			grin:DrybulkCarrierBusinessMember
1709	Tanker business [Member]	Member			grin:TankerBusinessMember
1710	Concentration risk type [Axis]	Axis			grin:ConcentrationRiskTypesAxis
1711	Concentration risk type [Domain]	Member			grin:ConcentrationRiskTypesDomain
1712	Customer one [Member]	Member			grin:CustomerOneMember
1713	Customer two [Member]	Member			grin:CustomerTwoMember
1714	Customer three [Member]	Member			grin:CustomerThreeMember
1715	Customer four [Member]	Member			grin:CustomerFourMember
1716	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1717	Customer risk percentage	Concept (Percent)	For Period		grin:CustomerRiskPercentage
1718	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1719	1159 - Disclosure - OTHER OPERATING INCOME (Details)	Network	*	*	http://www.grinshipping.com/role/OtherOperatingIncomeDetails
1720	Implied Table	Table	*	*	implied:Table
1721	Disclosure of other operating income expense [Abstract]	Abstract			grin:DisclosureOfOtherOperatingIncomeExpenseAbstract
1722	Foreign exchange gain	Concept (Monetary)	For Period	Credit	ifrs-full:NetForeignExchangeGain
1723	Gain on deemed disposal of previously held joint venture interest	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
1724	Gain on disposal of business	Concept (Monetary)	For Period	Credit	grin:GainOnDisposalOfBusiness
1725	Other operating income	Concept (Monetary)	For Period	Credit	ifrs-full:MiscellaneousOtherOperatingIncome
1726	Other Income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
1727	1160 - Disclosure - OTHER OPERATING EXPENSES (Details)	Network	*	*	http://www.grinshipping.com/role/OtherOperatingExpensesDetails
1728	Implied Table	Table	*	*	implied:Table
1729	Disclosure Of Other Operating Expense Explanatory [Abstract]	Abstract			grin:DisclosureOfOtherOperatingExpenseExplanatoryAbstract
1730	Impairment loss on ships (Note 14)	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1731	Impairment loss on goodwill and intangibles	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1732	Impairment loss on assets of disposal group (Note�39)	Concept (Monetary)	For Period	Debit	grin:ImpairmentLossRecognisedOnAssetsOfDisposalGroup
1733	Loss on disposal of business	Concept (Monetary)	For Period	Debit	grin:LossOnDisposalOfBusiness
1734	Foreign exchange loss	Concept (Monetary)	For Period	Debit	ifrs-full:NetForeignExchangeLoss
1735	Other operating expenses	Concept (Monetary)	For Period	Debit	ifrs-full:MiscellaneousOtherOperatingExpense
1736	Other operating expense	Concept (Monetary)	For Period	Debit	grin:OtherOperatingExpense
1737	1161 - Disclosure - INTEREST INCOME (Details)	Network	*	*	http://www.grinshipping.com/role/InterestIncomeDetails
1738	Implied Table	Table	*	*	implied:Table
1739	Disclosure of interest income [Abstract]	Abstract			grin:DisclosureOfInterestIncomeAbstract
1740	Interests on loans to joint ventures (Note�5)	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndReceivables
1741	Guarantee fees from related parties (Note�5)	Concept (Monetary)	For Period	Credit	grin:GuaranteeFeesFromRelatedParties
1742	Bank interests	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndAdvancesToBanks
1743	Other interests	Concept (Monetary)	For Period	Credit	grin:OtherInterestIncome
1744	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromInterest
1745	1162 - Disclosure - INTEREST EXPENSE (Details)	Network	*	*	http://www.grinshipping.com/role/InterestExpenseDetails
1746	Implied Table	Table	*	*	implied:Table
1747	Disclosure of interest expenses [Abstract]	Abstract			grin:DisclosureOfInterestExpensesAbstract
1748	Interest on bank loans	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBankLoansAndOverdrafts
1749	Interest on loans from related parties (Note�5)	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBorrowings
1750	Amortisation of upfront fees on bank loans	Concept (Monetary)	For Period	Debit	grin:AmortisationOfUpfrontFeesOnBankLoans
1751	Guarantee fees to related parties (Note�5)	Concept (Monetary)	For Period	Debit	grin:GuaranteeFeesToRelatedParties
1752	Other finance cost	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnOtherFinancialLiabilities
1753	Interest Expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
1754	1163 - Disclosure - LOSS BEFORE TAXATION (Details)	Network	*	*	http://www.grinshipping.com/role/LossBeforeTaxationDetails
1755	Statement [Table]	Table	*	*	us-gaap:StatementTable
1756	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1757	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1758	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1759	Depreciation of ships, dry-docking and plant and equipment (Note�14)	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1760	Depreciation of other property, plant and equipment	Concept (Monetary)	For Period	Debit	grin:DepreciationOfOtherPropertyPlantAndEquipment
1761	Amortisation of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
1762	Total depreciation and amortisation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
1763	Impairment loss net of reversals recognised on financial assets	Concept (Monetary)	For Period	Credit	grin:ImpairmentGainLossOnFinancialAssets
1764	Net gain on disposal of businesses	Concept (Monetary)	For Period	Credit	grin:GainOnDisposalOfBusiness
1765	Gain on deemed disposal of previously held joint venture interest	Concept (Monetary)	For Period	Credit	grin:GainOnDeemedDisposalOfPreviouslyHeldJointVentureInterest
1766	Cost of inventories recognised as expense (included in voyage expenses)	Concept (Monetary)	For Period	Debit	grin:CostOfInventoriesRecognisedAsExpenseDuringPeriodIncludesTheVoyageExpenses
1767	Expense recognised in respect of equity-settled share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
1768	Employee benefits expenses (including directors' remuneration and share ��based payments)	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
1769	Cost of defined benefit plan and defined contribution plans included in employee benefits expenses	Concept (Monetary)	For Period	Debit	grin:AdjustmentsForDefinedBenefitPlanAndDefinedContributionPlanCostsIncludedInEmployeeBenefitExpenses
1770	1164 - Disclosure - INCOME TAX (Details)	Network	*	*	http://www.grinshipping.com/role/IncomeTaxDetails
1771	Statement [Table]	Table	*	*	us-gaap:StatementTable
1772	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1773	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1774	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1775	Current tax	Abstract			grin:CurrentTaxAbstract
1776	In respect of the current year	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
1777	Capital gains taxation	Concept (Monetary)	For Period	Credit	grin:CapitalGainTaxation
1778	In respect of prior years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
1779	Current tax expense (income) and adjustments for current tax of prior periods	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
1780	Deferred tax	Abstract			grin:DeferredTaxAbstract
1781	In respect of the current year	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxExpense
1782	In respect of prior years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
1783	Deferred tax expense (income)	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
1784	Tax expense (income), continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1785	1165 - Disclosure - INCOME TAX (Details 1)	Network	*	*	http://www.grinshipping.com/role/IncomeTaxDetails1
1786	Statement [Table]	Table	*	*	us-gaap:StatementTable
1787	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1788	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1789	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1790	Loss before tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
1791	Income tax benefit calculated at corporate rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
1792	Adjusted for:	Abstract			grin:AdjustmentsForCalculatingIncomeTaxExpenseAbstract
1793	Effect of income that is exempted from tax	Concept (Monetary)	For Period	Credit	ifrs-full:TaxEffectOfRevenuesExemptFromTaxation2011
1794	Effect of expenses that are not deductible in determining taxable profit	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
1795	Effect of different tax rates of subsidiaries operating in other jurisdictions	Concept (Monetary)	For Period	Debit	grin:TaxEffectOfDifferentTaxRatesOfSubsidiaries
1796	Effect of tax losses disallowed to be brought forward	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfTaxLosses
1797	(Over)underprovision of tax in prior year	Concept (Monetary)	For Period	Debit	grin:TaxEffectOfOverprovisionInPriorYear
1798	Effect of different tax rate applied for capital gains	Concept (Monetary)	For Period	Debit	grin:TaxEffectOfCapitalGainTaxation
1799	Withholding tax	Concept (Monetary)	For Period	Debit	grin:TaxEffectOfTaxWithholdings
1800	Tax expense (income), continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1801	1166 - Disclosure - INCOME TAX (Details Textual)	Network	*	*	http://www.grinshipping.com/role/IncomeTaxDetailsTextual
1802	Statement [Table]	Table	*	*	us-gaap:StatementTable
1803	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1804	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1805	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1806	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1807	South africa [Member]	Member			country:ZA
1808	Singapore [Member]	Member			country:SG
1809	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1810	Applicable tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
1811	1167 - Disclosure - DIVIDENDS (Details Textual)	Network	*	*	http://www.grinshipping.com/role/DividendsDetailsTextual
1812	Statement [Table]	Table	*	*	us-gaap:StatementTable
1813	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1814	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1815	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1816	Dividends paid, ordinary shares per share	Concept (Share)	For Period		ifrs-full:DividendsPaidOrdinarySharesPerShare
1817	Dividends paid, ordinary shares	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaidOrdinaryShares
1818	1168 - Disclosure - CONTINGENT LIABILITIES (Details Textual)	Network	*	*	http://www.grinshipping.com/role/ContingentLiabilitiesDetailsTextual
1819	Statement [Table]	Table	*	*	us-gaap:StatementTable
1820	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1821	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1822	Lender name axis [Axis]	Axis			grin:LenderNameaxisAxis
1823	Lender name Domain [Domain]	Member			grin:LenderNameDomainDomain
1824	MitsuiCo Financial Services [Member]	Member			grin:MitsuiCoFinancialServicesMember
1825	Grindrod Shipping Pte Ltd and its subsidiaries [Member]	Member			grin:GrindrodShippingPteLtdAndItsSubsidiariesMember
1826	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1827	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1828	Leopard Tanker [Member]	Member			grin:LeopardTankerMember
1829	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1830	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1831	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
1832	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
1833	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1834	Credit facility face amount	Concept (Monetary)	As Of	Credit	grin:CreditFacilityFaceAmount
1835	Proportion of ownership interest in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1836	Percentage of guarantee provided	Concept (Percent)	For Period		grin:PercentageOfGuaranteeProvided
1837	Percentage of fee to be paid for guarantee provided	Concept (Percent)	For Period		grin:PercentageOfFeeToBePaidForGuaranteeProvided
1838	Line of credits	Concept (Monetary)	As Of	Credit	grin:LineOfCredits
1839	Description of guarantee provided	Concept (Text/String)	For Period		grin:DescriptionOfGuaranteeProvided
1840	1169 - Disclosure - LEASES AND SHIP CHARTERS (Details)	Network	*	*	http://www.grinshipping.com/role/LeasesAndShipChartersDetails
1841	Statement [Table]	Table	*	*	us-gaap:StatementTable
1842	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1843	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1844	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1845	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1846	With in one year	Member			ifrs-full:NotLaterThanOneYearMember
1847	Between two to five years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1848	After five years	Member			ifrs-full:LaterThanFiveYearsMember
1849	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1850	Minimum lease payments receivable under non-cancellable operating lease	Concept (Monetary)	As Of	Debit	ifrs-full:MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLease
1851	1170 - Disclosure - LEASES AND SHIP CHARTERS (Details 1)	Network	*	*	http://www.grinshipping.com/role/LeasesAndShipChartersDetails1
1852	Statement [Table]	Table	*	*	us-gaap:StatementTable
1853	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1854	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1855	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1856	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1857	On demand or within 1�year	Member			ifrs-full:NotLaterThanOneYearMember
1858	Between two to five years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1859	After five years	Member			ifrs-full:LaterThanFiveYearsMember
1860	Type of lease [Axis]	Axis			grin:TypeOfLeaseAxis
1861	Type of lease [Domain]	Member			grin:TypeOfLeaseDomain
1862	Office leases [Member]	Member			grin:OfficeLeasesMember
1863	Residential property leases [Member]	Member			grin:ResidentialPropertyLeasesMember
1864	Other leases member [Member]	Member			grin:OtherLeasesmemberMember
1865	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1866	Minimum lease payments payable under non-cancellable operating lease	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1867	Minimum operating lease payments recognised as expense	Concept (Monetary)	For Period	Debit	ifrs-full:MinimumOperatingLeasePayments
1868	1171 - Disclosure - LEASES AND SHIP CHARTERS (Details Textual)	Network	*	*	http://www.grinshipping.com/role/LeasesAndShipChartersDetailsTextual
1869	Statement [Table]	Table	*	*	us-gaap:StatementTable
1870	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1871	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1872	Type of lease [Axis]	Axis			grin:TypeOfLeaseAxis
1873	Type of lease [Domain]	Member			grin:TypeOfLeaseDomain
1874	Office leases [Member]	Member			grin:OfficeLeasesMember
1875	Residential property leases [Member]	Member			grin:ResidentialPropertyLeasesMember
1876	Range [Axis]	Axis			ifrs-full:RangeAxis
1877	Ranges [member]	Member			ifrs-full:RangesMember
1878	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1879	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1880	Arrangements involving legal form of lease [axis]	Axis			ifrs-full:ArrangementsInvolvingLegalFormOfLeaseAxis
1881	Arrangements involving legal form of lease [member]	Member			ifrs-full:ArrangementsInvolvingLegalFormOfLeaseMember
1882	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1883	Operating lease remaining lease term	Concept (xbrli:durationItemType)	For Period		grin:OperatingLeaseRemainingLeaseTerm
1884	Description Of Number Of Leasing Arrangements Entered By Lessee And Remaining Lease Term Classified As Operating Lease	Concept (Text/String)	For Period		grin:DescriptionOfNumberOfLeasingArrangementsEnteredByLesseeAndRemainingLeaseTermClassifiedAsOperatingLease
1885	1172 - Disclosure - ASSETS CLASSIFIED AS HELD FOR SALE (Details)	Network	*	*	http://www.grinshipping.com/role/AssetsClassifiedAsHeldForSaleDetails
1886	Statement [Table]	Table	*	*	us-gaap:StatementTable
1887	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1888	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1889	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1890	Assets and liabilities classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
1891	Non-current assets held for sale [member]	Member			ifrs-full:NoncurrentAssetsHeldForSaleMember
1892	Disposal groups classified as held for sale [member]	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
1893	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1894	Investment in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
1895	Net assets of disposal group	Concept (Monetary)	As Of	Debit	grin:AssetsLiabilitiesDisposalGroup
1896	Non-current assets or disposal groups classified as held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
1897	1173 - Disclosure - ASSETS CLASSIFIED AS HELD FOR SALE (Details 1)	Network	*	*	http://www.grinshipping.com/role/AssetsClassifiedAsHeldForSaleDetails1
1898	Statement [Table]	Table	*	*	us-gaap:StatementTable
1899	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1900	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1901	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1902	Assets	Abstract			grin:AssetsClassifiedAsPartOfDisposalGroupHeldForSaleabstractAbstract
1903	Cash and bank balances	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale
1904	Trade receivables	Concept (Monetary)	As Of	Debit	grin:TradeReceivablesClassifiedAsPartOfDisposalGroupHeldForSale
1905	Other receivables and prepayments	Concept (Monetary)	As Of	Debit	grin:OtherReceivablesAndPrepaymentsCurrentClassifiedAsPartOfDisposalGroupHeldForSale
1906	Due from related parties	Concept (Monetary)	As Of	Debit	grin:DueFromRelatedPartiesClassifiedAsPartOfDisposalGroupHeldForSale
1907	Inventories	Concept (Monetary)	As Of	Debit	grin:InventoriesClassifiedAsPartOfDisposalGroupHeldForSale
1908	Taxation	Concept (Monetary)	As Of	Debit	grin:TaxesClassifiedAsPartOfAssetDisposalGroupHeldForSale
1909	Ships, property, plant and equipment	Concept (Monetary)	As Of	Debit	grin:ShipsPropertyPlantAndEquipmentClassifiedAsPartOfDisposalGroupHeldForSale
1910	Intangible assets	Concept (Monetary)	As Of	Debit	grin:IntangibleAssetsClassifiedCarryingAmount
1911	Deferred tax assets	Concept (Monetary)	As Of	Debit	grin:DeferredTaxAssetsClassifiedAsPartOfDisposalGroupHeldForSale
1912	Assets classified as held for sale	Concept (Monetary)	As Of	Debit	grin:TotalAssetsIncludedInDisposalGroupsClassifiedAsHeldForSale
1913	Liabilities	Abstract			grin:LiabilitiesClassifiedAsPartOfDisposalGroupHeldForSaleabstractAbstract
1914	Short term borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
1915	Trade and other payables	Concept (Monetary)	As Of	Credit	grin:TradeAndOtherPayablesForDisposalGroupOfHeldForSale
1916	Due to related parties	Concept (Monetary)	As Of	Credit	grin:DueToRelatedPartiesPayable
1917	Taxation	Concept (Monetary)	As Of	Credit	grin:TaxesClassifiedAsPartOfDisposalGroupHeldForSale
1918	Long-term borrowings	Concept (Monetary)	As Of	Credit	grin:LongTermsBorrowings
1919	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	grin:DeferredTaxLiabilitiesClassifiedAsPartOfDisposalGroupHeldForSale
1920	Liabilities directly associated with assets classified as held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
1921	Net assets of disposal group	Concept (Monetary)	As Of	Debit	grin:NetAssetsIncludedInDisposalGroupClassifiedAsHeldForSale
1922	1174 - Disclosure - ASSETS CLASSIFIED AS HELD FOR SALE (Details Textual)	Network	*	*	http://www.grinshipping.com/role/AssetsClassifiedAsHeldForSaleDetailsTextual
1923	Statement [Table]	Table	*	*	us-gaap:StatementTable
1924	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1925	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1926	Disposal group name axis [Axis]	Axis			grin:DisposalGroupNameaxisAxis
1927	Disposal group name Domain [Domain]	Member			grin:DisposalGroupNameDomainDomain
1928	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1929	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
1930	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1931	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1932	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1933	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1934	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1935	Proceeds from disposal or maturity of available-for-sale financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
1936	Purchase of investments other than investments accounted for using equity method	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
1937	Impairment loss recognised on assets of disposal group	Concept (Monetary)	For Period	Debit	grin:ImpairmentLossRecognisedOnAssetsOfDisposalGroup
1938	1175 - Disclosure - COMMITMENTS (Details)	Network	*	*	http://www.grinshipping.com/role/CommitmentsDetails
1939	Statement [Table]	Table	*	*	us-gaap:StatementTable
1940	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1941	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1942	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1943	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1944	With in one year	Member			ifrs-full:NotLaterThanOneYearMember
1945	With in 2 to 5 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1946	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1947	Contractual capital commitments	Concept (Monetary)	As Of	Credit	ifrs-full:ContractualCapitalCommitments
1948	1176 - Disclosure - DISPOSALS OF BUSINESSES AND ASSET ACQUISITION (Details)	Network	*	*	http://www.grinshipping.com/role/DisposalsOfBusinessesAndAssetAcquisitionDetails
1949	Statement [Table]	Table	*	*	us-gaap:StatementTable
1950	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1951	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1952	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1953	Total sales consideration	Concept (Monetary)	For Period	Credit	ifrs-full:ConsiderationPaidReceived
1954	Carrying amount of net assets sold	Concept (Monetary)	As Of	Debit	grin:CarryingValueOfAssetsAndLiabilitiesNetHeldForSale
1955	Reclassification of translation reserve to profit or loss	Concept (Monetary)	As Of	Debit	grin:ReclassificationOfTranslationReserveToProfitOrLoss
1956	Gain on sale before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:GainsOnDisposalsOfInvestments
1957	Net cash inflow arising on disposal	Abstract			grin:CashInflowArisingOnDisposalAbstract
1958	Total sales consideration	Concept (Monetary)	For Period	Credit	ifrs-full:ConsiderationPaidReceived
1959	Less: Net settlement of amount due to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:AmountsPayableRelatedPartyTransactions
1960	Cash consideration received	Concept (Monetary)	For Period	Debit	ifrs-full:AssetsOtherThanCashOrCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
1961	Cash and cash equivalents disposed of	Concept (Monetary)	For Period	Debit	ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
1962	Consideration Received Net	Concept (Monetary)	For Period	Credit	grin:ConsiderationReceivedNet
1963	1177 - Disclosure - DISPOSALS OF BUSINESSES AND ASSET ACQUISITION (Details textual)	Network	*	*	http://www.grinshipping.com/role/DisposalsOfBusinessesAndAssetAcquisitionDetailsTextual
1964	Statement [Table]	Table	*	*	us-gaap:StatementTable
1965	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1966	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1967	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1968	Business combinations [member]	Member			ifrs-full:BusinessCombinationsMember
1969	Ocean Africa Container Lines [Member]	Member			grin:OceanAfricaContainerLinesMember
1970	Unicorn Bunker Services [Member]	Member			grin:UnicornBunkerServicesMember
1971	IM Shipping [Member]	Member			grin:IMShippingMember
1972	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1973	Carrying Value Of Assets Held For Sale	Concept (Monetary)	As Of	Debit	grin:CarryingValueOfAssetsHeldForSale
1974	Carrying Value Of Liabilities Held For Sale	Concept (Monetary)	As Of	Credit	grin:CarryingValueOfLiabilitiesHeldForSale
1975	Proportion of ownership interest in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1976	Cumulative Proportion Of Ownership Interest In Joint Venture After All Transactions	Concept (Percent)	For Period		grin:CumulativeProportionOfOwnershipInterestInJointVentureAfterAllTransactions
1977	Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
1978	Property, plant and equipment recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
1979	Cash and cash equivalents recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
1980	Consideration transferred, acquisition-date fair value	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
1981	Net asset sold disposal group	Concept (Monetary)	As Of	Debit	grin:NetAssetSoldDisposalGroup
1982	Adjustments for losses (gains) on disposal of non-current assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
1983	Financial assets reclassified out of financial assets at fair value through profit or loss, carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsReclassifiedOutOfFinancialAssetsAtFairValueThroughProfitOrLossCarryingAmount
1984	1178 - Disclosure - EARNINGS PER SHARE (Details)	Network	*	*	http://www.grinshipping.com/role/EarningsPerShareDetails
1985	Statement [Table]	Table	*	*	us-gaap:StatementTable
1986	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1987	Currently stated [member]	Member			ifrs-full:RestatedMember
1988	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1989	Loss for the purpose of basic earnings per share	Abstract			ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityAbstract
1990	Net loss attributable to the shareholders of the Group	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
1991	Effect of dilutive potential on ordinary share	Concept (Monetary)	For Period	Debit	grin:AdjustmentToProfitlossForDilutiveEffectOnOrdinaryShare
1992	Earnings for the purposes of diluted earnings per share	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
1993	Number of shares	Abstract			ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
1994	Weighted average number of ordinary shares for the purpose of basic earnings per share	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
1995	Basic and diluted loss per share	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
1996	1179 - Disclosure - EARNINGS PER SHARE (Details 1)	Network	*	*	http://www.grinshipping.com/role/EarningsPerShareDetails1
1997	Statement [Table]	Table	*	*	us-gaap:StatementTable
1998	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
1999	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
2000	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
2001	Currently stated [member]	Member			ifrs-full:RestatedMember
2002	Impact of the adoption of IFRS 9 [Member]	Member			grin:IncreaseDecreaseDueToApplicationOfIFRS9Member
2003	Impact of the adoption of IFRS 15 [Member]	Member			ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
2004	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
2005	Impact on profit for the year from continuing operations	Concept (Monetary)	For Period	Debit	grin:EffectOfIncreaseDecreaseInProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
2006	Impact on basic earnings per share	Concept (Share)	For Period		grin:EffectOfIncreaseDecreaseInBasicEarningsLossPerShare
2007	Impact on diluted earnings per share	Concept (Share)	For Period		grin:EffectOfIncreaseDecreaseInDilutedEarningsLossPerShare
2008	1180 - Disclosure - EARNINGS PER SHARE (Details Textual)	Network	*	*	http://www.grinshipping.com/role/EarningsPerShareDetailsTextual
2009	Statement [Table]	Table	*	*	us-gaap:StatementTable
2010	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
2011	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
2012	Ordinary Share [Member]	Member			grin:OrdinaryShareMember
2013	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
2014	Number Of Instruments Other Equity Instruments Granted	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
2015	1181 - Disclosure - EVENTS AFTER THE REPORTING PERIOD (Details Textual)	Network	*	*	http://www.grinshipping.com/role/EventsAfterTheReportingPeriodDetailsTextual
2016	Statement [Table]	Table	*	*	us-gaap:StatementTable
2017	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
2018	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
2019	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
2020	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
2021	Leopard Tankers PteLtd [Member]	Member			grin:LeopardTankersPteLtdMember
2022	Petrochemical Shipping Limited [Member]	Member			grin:PetrochemicalShippingLimitedMember
2023	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
2024	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
2025	Ships [member]	Member			ifrs-full:ShipsMember
2026	Characteristics of defined benefit plans [axis]	Axis			ifrs-full:CharacteristicsOfDefinedBenefitPlansAxis
2027	Characteristics of defined benefit plans [member]	Member			ifrs-full:CharacteristicsOfDefinedBenefitPlansMember
2028	Pension defined benefit plans [member]	Member			ifrs-full:PensionDefinedBenefitPlansMember
2029	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2030	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
2031	Nonadjusting Events After Reporting [Member]	Member			grin:NonadjustingEventsAfterReportingMember
2032	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
2033	Additions other than through business combinations, property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
2034	Disposals, property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
2035	Percentage of pension fund surplus	Concept (Percent)	For Period		grin:PercentageOfPensionFundSurplus
2036	Ships	Concept (Monetary)	As Of	Debit	ifrs-full:Ships