Piedmont Lithium Ltd (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	000100 - Document - Document and Entity Information	Network	*	*	http://piedmontlithium.com/role/DocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document and Entity Information [Abstract]	Abstract			plll:DocumentAndEntityInformationAbstract
4	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
5	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
6	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
7	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
8	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
9	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
10	Entity Shell Company	Concept (Yes/No)	For Period		dei:EntityShellCompany
11	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
12	Entity Small Business	Concept (Yes/No)	For Period		dei:EntitySmallBusiness
13	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
14	Entity Ex Transition Period	Concept (Yes/No)	For Period		dei:EntityExTransitionPeriod
15	Entity Public Float	Concept (Monetary)	As Of	Credit	dei:EntityPublicFloat
16	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
17	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
18	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
19	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
20	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
21	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
22	010000 - Statement - CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME	Network	*	*	http://piedmontlithium.com/role/ConsolidatedStatementsOfProfitOrLossAndOtherComprehensiveIncome
23	Implied Table	Table	*	*	implied:Table
24	CONSOLIDATED STATEMENT OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME [Abstract]	Abstract			ifrs-full:IncomeStatementAbstract
25	Continuing operations	Abstract			plll:ContinuingOperationsAbstract
26	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromInterest
27	Exploration and evaluation expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
28	Corporate and administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SellingGeneralAndAdministrativeExpense
29	Business development expenses	Concept (Monetary)	For Period	Debit	plll:BusinessDevelopmentExpenses
30	Share based payments	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
31	Foreign stock exchange listing expenses	Concept (Monetary)	For Period	Debit	plll:StockExchangeListingCosts
32	Other income and expenses	Concept (Monetary)	For Period	Credit	ifrs-full:OtherOperatingIncomeExpense
33	Loss before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
34	Income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
35	Loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
36	Loss attributable to members of Piedmont Lithium Limited	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
37	Other comprehensive income	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
38	Items that may be reclassified subsequently to profit or loss:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
39	Exchange differences arising on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
40	Other comprehensive (loss)/income for the year, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
41	Total comprehensive loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
42	Total comprehensive loss attributable to members of Piedmont Lithium Limited	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
43	Basic loss per share (cents per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
44	Diluted loss per share (cents per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
45	020000 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION	Network	*	*	http://piedmontlithium.com/role/ConsolidatedStatementsOfFinancialPosition
46	Implied Table	Table	*	*	implied:Table
47	CONSOLIDATED STATEMENT OF FINANCIAL POSITION [Abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
48	ASSETS	Abstract			ifrs-full:AssetsAbstract
49	Current Assets	Abstract			ifrs-full:CurrentAssetsAbstract
50	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
51	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
52	Total Current Assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
53	Non-Current Assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
54	Exploration and evaluation assets	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
55	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
56	Total Non-Current Assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
57	TOTAL ASSETS	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
58	LIABILITIES	Abstract			ifrs-full:LiabilitiesAbstract
59	Current Liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
60	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
61	Total Current Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
62	TOTAL LIABILITIES	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
63	NET ASSETS	Concept (Monetary)	As Of	Debit	ifrs-full:NetAssetsLiabilities
64	EQUITY	Abstract			ifrs-full:EquityAbstract
65	Contributed equity	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
66	Reserves	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalReserve
67	Accumulated losses	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
68	TOTAL EQUITY	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
69	030000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY	Network	*	*	http://piedmontlithium.com/role/ConsolidatedStatementsOfChangesInEquity
70	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
71	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
72	Equity [member]	Member			ifrs-full:EquityMember
73	Contributed Equity [Member]	Member			ifrs-full:IssuedCapitalMember
74	Share Based Payments Reserve [Member]	Member			ifrs-full:ReserveOfSharebasedPaymentsMember
75	Foreign Currency Translation Reserve [Member]	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
76	Accumulated Losses [Member]	Member			ifrs-full:RetainedEarningsMember
77	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
78	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
79	Net loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
80	Exchange differences arising on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
81	Total comprehensive loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
82	Issue of shares	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
83	Exercise of options	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
84	Share issue costs	Concept (Monetary)	For Period	Debit	ifrs-full:ShareIssueRelatedCost
85	Share based payments	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
86	Balances	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
87	040000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS	Network	*	*	http://piedmontlithium.com/role/ConsolidatedStatementsOfCashFlows
88	Implied Table	Table	*	*	implied:Table
89	CONSOLIDATED STATEMENT OF CASH FLOWS [Abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
90	Operating activities	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
91	Payments to suppliers and employees	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToSuppliersForGoodsAndServicesAndToAndOnBehalfOfEmployees
92	Interest received	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsOperatingActivities
93	Net cash flows used in operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
94	Investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
95	Purchase of exploration and evaluation assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfExplorationAndEvaluationAssets
96	Purchase of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
97	Payment of deposits	Concept (Monetary)	For Period	Credit	plll:PaymentOfAdvancesToSuppliers
98	Proceeds from sale of available-for-sale investments	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
99	Net cash flows used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
100	Financing activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
101	Proceeds from issue of shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
102	Share issue costs	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsForShareIssueCosts
103	Net cash flows from financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
104	Net increase/(decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
105	Net foreign exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
106	Cash and cash equivalents at beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
107	Cash and cash equivalents at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
108	060100 - Disclosure - STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES	Network	*	*	http://piedmontlithium.com/role/StatementOfSignificantAccountingPolicies
109	Implied Table	Table	*	*	implied:Table
110	STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]	Abstract			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
111	STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
112	060200 - Disclosure - OTHER INCOME AND EXPENSES	Network	*	*	http://piedmontlithium.com/role/OtherIncomeAndExpenses
113	Implied Table	Table	*	*	implied:Table
114	OTHER INCOME AND EXPENSES [Abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
115	OTHER INCOME AND EXPENSES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
116	060300 - Disclosure - INCOME TAX	Network	*	*	http://piedmontlithium.com/role/IncomeTax
117	Implied Table	Table	*	*	implied:Table
118	INCOME TAX [Abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
119	INCOME TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
120	060400 - Disclosure - DIVIDENDS PAID OR PROVIDED FOR ON ORDINARY SHARES	Network	*	*	http://piedmontlithium.com/role/DividendsPaidOrProvidedForOnOrdinaryShares
121	Implied Table	Table	*	*	implied:Table
122	DIVIDENDS PAID OR PROVIDED FOR ON ORDINARY SHARES [Abstract]	Abstract			plll:DIVIDENDSPAIDORPROVIDEDFORONORDINARYSHARESAbstract
123	DIVIDENDS PAID OR PROVIDED FOR ON ORDINARY SHARES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
124	060500 - Disclosure - CASH AND CASH EQUIVALENTS	Network	*	*	http://piedmontlithium.com/role/CashAndCashEquivalents
125	Implied Table	Table	*	*	implied:Table
126	CASH AND CASH EQUIVALENTS [Abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
127	CASH AND CASH EQUIVALENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
128	060600 - Disclosure - TRADE AND OTHER RECEIVABLES	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherReceivables
129	Implied Table	Table	*	*	implied:Table
130	TRADE AND OTHER RECEIVABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
131	TRADE AND OTHER RECEIVABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
132	060700 - Disclosure - EXPLORATION AND EVALUATION ASSETS	Network	*	*	http://piedmontlithium.com/role/ExplorationAndEvaluationAssets
133	Implied Table	Table	*	*	implied:Table
134	EXPLORATION AND EVALUATION ASSETS [Abstract]	Abstract			plll:EXPLORATIONANDEVALUATIONASSETSAbstract
135	EXPLORATION AND EVALUATION ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfExplorationAndEvaluationAssetsExplanatory
136	060800 - Disclosure - PROPERTY, PLANT AND EQUIPMENT	Network	*	*	http://piedmontlithium.com/role/PropertyPlantAndEquipment
137	Implied Table	Table	*	*	implied:Table
138	PROPERTY, PLANT AND EQUIPMENT [Abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
139	PROPERTY, PLANT AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
140	060900 - Disclosure - TRADE AND OTHER PAYABLES	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherPayables
141	Implied Table	Table	*	*	implied:Table
142	TRADE AND OTHER PAYABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
143	TRADE AND OTHER PAYABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
144	061000 - Disclosure - CONTRIBUTED EQUITY	Network	*	*	http://piedmontlithium.com/role/ContributedEquity
145	Implied Table	Table	*	*	implied:Table
146	CONTRIBUTED EQUITY [Abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
147	CONTRIBUTED EQUITY	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
148	061100 - Disclosure - RESERVES	Network	*	*	http://piedmontlithium.com/role/Reserves
149	Implied Table	Table	*	*	implied:Table
150	RESERVES [Abstract]	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
151	RESERVES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
152	061200 - Disclosure - ACCUMULATED LOSSES	Network	*	*	http://piedmontlithium.com/role/AccumulatedLosses
153	Implied Table	Table	*	*	implied:Table
154	ACCUMULATED LOSSES [Abstract]	Abstract			plll:AccumulatedLossesAbstract
155	ACCUMULATED LOSSES	Concept (Text Block (HTML))	For Period		plll:AccumulatedLossesTextBlock
156	061300 - Disclosure - EARNINGS PER SHARE	Network	*	*	http://piedmontlithium.com/role/EarningsPerShare
157	Implied Table	Table	*	*	implied:Table
158	EARNINGS PER SHARE [Abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
159	EARNINGS PER SHARE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
160	061400 - Disclosure - RELATED PARTIES	Network	*	*	http://piedmontlithium.com/role/RelatedParties
161	Implied Table	Table	*	*	implied:Table
162	RELATED PARTIES [Abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
163	RELATED PARTIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
164	061500 - Disclosure - SHARE-BASED PAYMENTS	Network	*	*	http://piedmontlithium.com/role/SharebasedPayments
165	Implied Table	Table	*	*	implied:Table
166	SHARE-BASED PAYMENTS [Abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
167	SHARE-BASED PAYMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
168	061600 - Disclosure - SEGMENT INFORMATION	Network	*	*	http://piedmontlithium.com/role/SegmentInformation
169	Implied Table	Table	*	*	implied:Table
170	SEGMENT INFORMATION [Abstract]	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
171	SEGMENT INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
172	061700 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPolicies
173	Implied Table	Table	*	*	implied:Table
174	FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES [Abstract]	Abstract			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
175	FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
176	061800 - Disclosure - CONTINGENT ASSETS AND LIABILITIES	Network	*	*	http://piedmontlithium.com/role/ContingentAssetsAndLiabilities
177	Implied Table	Table	*	*	implied:Table
178	CONTINGENT ASSETS AND LIABILITIES [Abstract]	Abstract			plll:ContingentAssetsAndLiabilitiesAbstract
179	CONTINGENT ASSETS AND LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory
180	061900 - Disclosure - COMMITMENTS	Network	*	*	http://piedmontlithium.com/role/Commitments
181	Implied Table	Table	*	*	implied:Table
182	COMMITMENTS [Abstract]	Abstract			plll:COMMITMENTSAbstract
183	COMMITMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsExplanatory
184	062000 - Disclosure - EVENTS SUBSEQUENT TO BALANCE DATE	Network	*	*	http://piedmontlithium.com/role/EventsSubsequentToBalanceDate
185	Implied Table	Table	*	*	implied:Table
186	EVENTS SUBSEQUENT TO BALANCE DATE [Abstract]	Abstract			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract
187	EVENTS SUBSEQUENT TO BALANCE DATE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
188	070100 - Disclosure - STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Network	*	*	http://piedmontlithium.com/role/StatementOfSignificantAccountingPoliciesPolicies
189	Implied Table	Table	*	*	implied:Table
190	STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]	Abstract			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
191	Basis of Preparation	Concept (Text Block (HTML))	For Period		plll:DescriptionOfAccountingPolicyForBasisOfPreparationPolicyTextBlock
192	Change in presentation currency	Concept (Text Block (HTML))	For Period		plll:DescriptionOfAccountingPolicyForChangeInPresentationCurrencyTextBlock
193	Statement of Compliance	Concept (Text Block (HTML))	For Period		plll:DescriptionOfAccountingPolicyForStatementOfCompliancePolicyTextBlock
194	Principles of Consolidation	Concept (Text Block (HTML))	For Period		plll:DescriptionOfAccountingPolicyForPrinciplesOfConsolidationPolicyTextBlock
195	Foreign Currencies	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
196	Cash and Cash Equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
197	Trade and Other Receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
198	Investments and Other Financial Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
199	Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
200	Exploration and Development Expenditure	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures
201	Payables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
202	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
203	Interest Income	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory
204	Income Tax	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
205	Employee Entitlements	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
206	Earnings per Share	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
207	Goods and Services Tax	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTaxesOtherThanIncomeTaxExplanatory
208	Use and Revision of Accounting Estimates, Judgements and Assumptions	Concept (Text Block (HTML))	For Period		plll:DescriptionOfAccountingPolicyForUseAndRevisionOfAccountingEstimatesPolicyTextBlock
209	Operating Segments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
210	Impairment of Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
211	Fair Value Estimation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory
212	Issued and Unissued Capital	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory
213	Dividends	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory
214	Share-Based Payments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
215	080100 - Disclosure - STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Network	*	*	http://piedmontlithium.com/role/StatementOfSignificantAccountingPoliciesTables
216	Implied Table	Table	*	*	implied:Table
217	STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]	Abstract			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
218	International Financial Reporting Standards and Interpretations that may be Relevant to the Group	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
219	Depreciation on Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		plll:DisclosureOfDetailedInformationOfDepreciationOnPropertyPlantAndEquipmentTableTextBlock
220	080200 - Disclosure - OTHER INCOME AND EXPENSES (Tables)	Network	*	*	http://piedmontlithium.com/role/OtherIncomeAndExpensesTables
221	Implied Table	Table	*	*	implied:Table
222	OTHER INCOME AND EXPENSES [Abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
223	Other Income and Expenses	Concept (Text Block (HTML))	For Period		plll:DisclosureOfDetailsOfOtherOperatingIncomeAndExpenseTableTextBlock
224	080300 - Disclosure - INCOME TAX (Tables)	Network	*	*	http://piedmontlithium.com/role/IncomeTaxTables
225	Implied Table	Table	*	*	implied:Table
226	INCOME TAX [Abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
227	Income Tax	Concept (Text Block (HTML))	For Period		plll:DisclosureOfIncomeTaxTableTextBlock
228	080500 - Disclosure - CASH AND CASH EQUIVALENTS (Tables)	Network	*	*	http://piedmontlithium.com/role/CashAndCashEquivalentsTables
229	Implied Table	Table	*	*	implied:Table
230	CASH AND CASH EQUIVALENTS [Abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
231	Cash and Cash Equivalents	Concept (Text Block (HTML))	For Period		plll:DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock
232	080600 - Disclosure - TRADE AND OTHER RECEIVABLES (Tables)	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherReceivablesTables
233	Implied Table	Table	*	*	implied:Table
234	TRADE AND OTHER RECEIVABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
235	Trade and Other Receivables	Concept (Text Block (HTML))	For Period		plll:DisclosureOfTradeAndOtherReceivablesTableTextBlock
236	080700 - Disclosure - EXPLORATION AND EVALUATION ASSETS (Tables)	Network	*	*	http://piedmontlithium.com/role/ExplorationAndEvaluationAssetsTables
237	Implied Table	Table	*	*	implied:Table
238	EXPLORATION AND EVALUATION ASSETS [Abstract]	Abstract			plll:EXPLORATIONANDEVALUATIONASSETSAbstract
239	Exploration and Evaluation Assets	Concept (Text Block (HTML))	For Period		plll:DisclosureOfExplorationAndEvaluationAssetsTableTextBlock
240	080800 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables)	Network	*	*	http://piedmontlithium.com/role/PropertyPlantAndEquipmentTables
241	Implied Table	Table	*	*	implied:Table
242	PROPERTY, PLANT AND EQUIPMENT [Abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
243	Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
244	080900 - Disclosure - TRADE AND OTHER PAYABLES (Tables)	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherPayablesTables
245	Implied Table	Table	*	*	implied:Table
246	TRADE AND OTHER PAYABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
247	Trade and Other Payables	Concept (Text Block (HTML))	For Period		plll:DisclosureOfDetailedInformationAboutTradeAndOtherPayablesTableTextBlock
248	081000 - Disclosure - CONTRIBUTED EQUITY (Tables)	Network	*	*	http://piedmontlithium.com/role/ContributedEquityTables
249	Implied Table	Table	*	*	implied:Table
250	CONTRIBUTED EQUITY [Abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
251	Issued Capital	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIssuedCapitalExplanatory
252	081100 - Disclosure - RESERVES (Tables)	Network	*	*	http://piedmontlithium.com/role/ReservesTables
253	Implied Table	Table	*	*	implied:Table
254	RESERVES [Abstract]	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
255	Reserves	Concept (Text Block (HTML))	For Period		plll:DisclosureOfReservesTableTextBlock
256	Movements in Share-based Payments Reserve	Concept (Text Block (HTML))	For Period		plll:DisclosureOfMovementsInShareBasedPaymentsReserveTableTextBlock
257	Movements in Foreign Currency Translation Reserve	Concept (Text Block (HTML))	For Period		plll:DisclosureOfMovementsInForeignCurrencyTranslationReserveTableTextBlock
258	081200 - Disclosure - ACCUMULATED LOSSES (Tables)	Network	*	*	http://piedmontlithium.com/role/AccumulatedLossesTables
259	Implied Table	Table	*	*	implied:Table
260	ACCUMULATED LOSSES [Abstract]	Abstract			plll:AccumulatedLossesAbstract
261	Accumulated Losses	Concept (Text Block (HTML))	For Period		plll:DisclosureOfAccumulatedLossesTextBlock
262	081300 - Disclosure - EARNINGS PER SHARE (Tables)	Network	*	*	http://piedmontlithium.com/role/EarningsPerShareTables
263	Implied Table	Table	*	*	implied:Table
264	EARNINGS PER SHARE [Abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
265	Basic and Diluted Loss per Share	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
266	Income and Share Data Used in Calculations of Basic Earnings Per Share	Concept (Text Block (HTML))	For Period		plll:IncomeAndShareDataUsedInCalculationsOfBasicEarningsPerShareTableTextBlock
267	Weighted Average Number of Ordinary Shares Used in Calculating Basic and Dilutive Earnings Per Share	Concept (Text Block (HTML))	For Period		plll:WeightedAverageNumberOfOrdinarySharesUsedInCalculatingBasicAndDilutiveEarningsPerShareTableTextBlock
268	081400 - Disclosure - RELATED PARTIES (Tables)	Network	*	*	http://piedmontlithium.com/role/RelatedPartiesTables
269	Implied Table	Table	*	*	implied:Table
270	RELATED PARTIES [Abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
271	Subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
272	Aggregate Compensation Made to Key Management Personnel	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
273	081500 - Disclosure - SHARE-BASED PAYMENTS (Tables)	Network	*	*	http://piedmontlithium.com/role/SharebasedPaymentsTables
274	Implied Table	Table	*	*	implied:Table
275	SHARE-BASED PAYMENTS [Abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
276	Equity-Settled Share-Based Payments	Concept (Text Block (HTML))	For Period		ifrs-full:ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss
277	Number and Weighted Average Exercise Prices of Incentive Options and Performance Rights Granted	Concept (Text Block (HTML))	For Period		plll:DisclosureOfNumberAndWeightedAverageExercisePricesOfInstrumentsOutstandingTableTextBlock
278	Incentive Options and Performance Rights Granted	Concept (Text Block (HTML))	For Period		plll:DisclosureOfIncentiveOptionsAndPerformanceRightsWereGrantedAsShareBasedPaymentsTableTextBlock
279	Valuation Model Used for Share Options Granted	Concept (Text Block (HTML))	For Period		plll:DisclosureOfValuationModelUsedForInstrumentsGrantedTableTextBlock
280	081600 - Disclosure - SEGMENT INFORMATION (Tables)	Network	*	*	http://piedmontlithium.com/role/SegmentInformationTables
281	Implied Table	Table	*	*	implied:Table
282	SEGMENT INFORMATION [Abstract]	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
283	Reconciliation of non-current assets by geographical location	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
284	081700 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES (Tables)	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPoliciesTables
285	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
286	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
287	Risks [member]	Member			ifrs-full:TypesOfRisksMember
288	Interest Rate Risk [Member]	Member			ifrs-full:InterestRateRiskMember
289	Foreign Currency Risk [Member]	Member			ifrs-full:CurrencyRiskMember
290	Disclosure of nature and extent of risks arising from financial instruments [line items]	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
291	Sensitivity Analysis	Concept (Text Block (HTML))	For Period		ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
292	081900 - Disclosure - COMMITMENTS (Tables)	Network	*	*	http://piedmontlithium.com/role/CommitmentsTables
293	Implied Table	Table	*	*	implied:Table
294	COMMITMENTS [Abstract]	Abstract			plll:COMMITMENTSAbstract
295	Material Commitments for Consolidated Group	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
296	090100 - Disclosure - STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://piedmontlithium.com/role/StatementOfSignificantAccountingPoliciesDetails
297	Disclosure of expected impact of initial application of new standards or interpretations [table]	Table	*	*	ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
298	New IFRSs [axis]	Axis			ifrs-full:NewIFRSsAxis
299	New IFRSs [member]	Member			ifrs-full:NewIFRSsMember
300	IFRS 9 Financial Instruments, and Relevant Amending Standards [Member]	Member			plll:IFRS9FinancialInstrumentsAndRelevantAmendingStandardsMember
301	IFRS 15 Revenue from Contracts with Customers, and Relevant Amending Standards [Member]	Member			plll:IFRS15RevenueFromContractsWithCustomersAndRelevantAmendingStandardsMember
302	Amendments to IFRS 2 Share-based Payments - Classification and Measurement of Share-based Payment Transactions [Member]	Member			plll:AmendmentsToIFRS2ShareBasedPaymentsClassificationAndMeasurementOfShareBasedPaymentTransactionsMember
303	IFRIC 22 Foreign Currency Transactions and Advance Consideration [Member]	Member			plll:IFRIC22ForeignCurrencyTransactionsAndAdvanceConsiderationMember
304	IFRS 16 Leases [Member]	Member			plll:IFRS16LeasesMember
305	Disclosure of expected impact of initial application of new standards or interpretations [line items]	LineItems			ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
306	New standards and amendments to standards issued but not effected [Abstract]	Abstract			plll:NewStandardsAndAmendmentsToStandardsIssuedButNotEffectedAbstract
307	Standard/Interpretation	Concept (Text/String)	For Period		ifrs-full:TitleOfNewIFRS
308	Application Date of Standard	Concept (Date)	For Period		ifrs-full:DateByWhichApplicationOfNewIFRSIsRequired
309	Application Date for Group	Concept (Date)	For Period		ifrs-full:DateAsAtWhichEntityPlansToApplyNewIFRSInitially
310	090100 - Disclosure - STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://piedmontlithium.com/role/StatementOfSignificantAccountingPoliciesDetails
311	Implied Table	Table	*	*	implied:Table
312	STATEMENT OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]	Abstract			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
313	Change in presentation currency [Abstract]	Abstract			plll:FunctionalAndPresentationCurrencyAbstractAbstract
314	Foreign currency translation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
315	Major depreciation periods are [Abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
316	Plant and equipment	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
317	Payables [Abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
318	Settlement period of trade accounts payable	Concept (xbrli:durationItemType)	For Period		plll:SettlementPeriodOfTradeAccountsPayable
319	090200 - Disclosure - OTHER INCOME AND EXPENSES (Details)	Network	*	*	http://piedmontlithium.com/role/OtherIncomeAndExpensesDetails
320	Implied Table	Table	*	*	implied:Table
321	OTHER INCOME AND EXPENSES [Abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
322	Other income [Abstract]	Abstract			plll:OthersIncomeAbstract
323	Net foreign exchange gain	Concept (Monetary)	For Period	Credit	ifrs-full:NetForeignExchangeGain
324	Net gain on sale of available-for-sale investments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnAvailableforsaleFinancialAssets
325	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
326	Other expenses [abstract]	Abstract			ifrs-full:ExpenseByNatureAbstract
327	Net foreign exchange loss	Concept (Monetary)	For Period	Debit	ifrs-full:NetForeignExchangeLoss
328	Depreciation, amortisation and impairment	Abstract			ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossAbstract
329	Included in corporate and administrative expenses [Abstract]	Abstract			plll:DepreciationAndImpairmentIncludedInCorporateAndAdministrativeExpensesAbstract
330	Depreciation of plant and equipment	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
331	Included in exploration and evaluation expenses [Abstract]	Abstract			plll:DepreciationAndImpairmentIncludedInExplorationAndEvaluationExpensesAbstract
332	Impairment of exploration and evaluation asset	Concept (Monetary)	For Period	Debit	plll:ImpairmentLossRecognizedInProfitOrLossExplorationAndEvaluationAssets
333	Depreciation and impairment	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
334	Employee benefits expense (including KMP) [Abstract]	Abstract			ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
335	Included in corporate and administrative expenses [Abstract]	Abstract			plll:EmployeeBenefitsExpenseIncludedInCorporateAndAdministrativeExpensesAbstract
336	Wages, salaries and fees	Concept (Monetary)	For Period	Debit	plll:CorporateAndAdministrativeExpensesWagesSalariesAndFees
337	Defined contribution plans	Concept (Monetary)	For Period	Debit	plll:CorporateAndAdministrativeExpensesPostEmploymentBenefitExpenseDefinedContributionPlans
338	Other employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:OtherEmployeeExpense
339	Included in exploration and evaluation expenses [Abstract]	Abstract			plll:EmployeeBenefitsExpenseIncludedInExplorationAndEvaluationExpensesAbstract
340	Wages, salaries and fees	Concept (Monetary)	For Period	Debit	plll:ExplorationAndEvaluationExpensesWagesSalariesAndFees
341	Defined contribution plans	Concept (Monetary)	For Period	Debit	plll:ExplorationAndEvaluationExpensesPostEmploymentBenefitExpenseDefinedContributionPlans
342	Termination payments	Concept (Monetary)	For Period	Debit	plll:ExplorationAndEvaluationExpensesTerminationBenefitsExpense
343	Included in business development expenses [Abstract]	Abstract			plll:EmployeeBenefitsExpenseIncludedInBusinessDevelopmentExpensesAbstract
344	Wages, salaries and fees	Concept (Monetary)	For Period	Debit	plll:BusinessDevelopmentExpensesWagesSalariesAndFees
345	Defined contribution plans	Concept (Monetary)	For Period	Debit	plll:BusinessDevelopmentExpensesPostEmploymentBenefitExpenseDefinedContributionPlans
346	Termination payments	Concept (Monetary)	For Period	Debit	plll:BusinessDevelopmentExpensesTerminationBenefitsExpense
347	Included in share-based payments:	Abstract			plll:EmployeeBenefitsExpenseIncludedInShareBasedPaymentsAbstract
348	Share based payments	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
349	Employee benefits expense (including key management personnel)	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
350	090300 - Disclosure - INCOME TAX (Details)	Network	*	*	http://piedmontlithium.com/role/IncomeTaxDetails
351	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
352	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
353	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
354	Accrued Interest [Member]	Member			plll:UnusedTaxLossesAccruedInterestMember
355	Exploration and Evaluation Assets [Member]	Member			plll:UnusedTaxLossesExplorationAndEvaluationAssetsMember
356	Accrued Expenditures [Member]	Member			plll:UnusedTaxCreditsAccruedExpenditureMember
357	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
358	Deferred Tax Assets and Liabilities [Abstract]	Abstract			ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
359	Deferred Tax Liabilities [Abstract]	Abstract			plll:DeferredTaxLiabilityAbstract
360	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
361	Deferred tax assets used to offset deferred tax liabilities	Concept (Monetary)	As Of	Debit	plll:DeferredTaxAssetsOffsettingDeferredTaxLiabilities
362	Deferred tax liability (asset)	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
363	Deferred Tax Assets [Abstract]	Abstract			plll:DeferredTaxAssetsAbstract
364	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
365	Deferred tax assets used to offset deferred tax liabilities	Concept (Monetary)	As Of	Debit	plll:DeferredTaxAssetsOffsettingDeferredTaxLiabilities
366	Deferred tax assets not brought to account	Concept (Monetary)	As Of		plll:DeferredTaxAssetsUnused
367	Deferred tax liability (asset)	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
368	090300 - Disclosure - INCOME TAX (Details)	Network	*	*	http://piedmontlithium.com/role/IncomeTaxDetails
369	Implied Table	Table	*	*	implied:Table
370	INCOME TAX [Abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
371	Recognized in profit or loss [Abstract]	Abstract			plll:IncomeTaxRecognisedInProfitOrLossAbstract
372	Current income tax [Abstract]	Abstract			ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
373	Current income tax benefit in respect of the current year	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
374	Deferred income tax [Abstract]	Abstract			ifrs-full:DeferredTaxExpenseIncomeAbstract
375	Origination and reversal of temporary differences	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
376	Income tax expense reported in profit or loss	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
377	Reconciliation between tax expense and accounting loss before income tax [Abstract]	Abstract			ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
378	Accounting loss before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
379	At the Australian income tax rate of 27.5% (2017: 27.5%) (2016: 30%)	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
380	Expenditure not allowable for income tax purposes	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
381	Income not assessable for income tax purposes	Concept (Monetary)	For Period	Credit	ifrs-full:TaxEffectOfRevenuesExemptFromTaxation2011
382	Effect of decrease in Australian income tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
383	Effect of higher tax rates in the United States	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfForeignTaxRates
384	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Debit	plll:TaxEffectOfTranslationDifferences
385	Adjustments in respect of deferred income tax of previous years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
386	Effect of deferred tax assets not brought to account	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
387	Income tax expense reported in profit or loss	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
388	Corporate tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
389	090400 - Disclosure - DIVIDENDS PAID OR PROVIDED FOR ON ORDINARY SHARES (Details)	Network	*	*	http://piedmontlithium.com/role/DividendsPaidOrProvidedForOnOrdinarySharesDetails
390	Implied Table	Table	*	*	implied:Table
391	DIVIDENDS PAID OR PROVIDED FOR ON ORDINARY SHARES [Abstract]	Abstract			plll:DIVIDENDSPAIDORPROVIDEDFORONORDINARYSHARESAbstract
392	Dividends paid	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaidOrdinaryShares
393	Dividends proposed	Concept (Monetary)	For Period		ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners
394	090500 - Disclosure - CASH AND CASH EQUIVALENTS (Details)	Network	*	*	http://piedmontlithium.com/role/CashAndCashEquivalentsDetails
395	Implied Table	Table	*	*	implied:Table
396	CASH AND CASH EQUIVALENTS [Abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
397	Cash at bank and on hand	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
398	Short term deposits	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
399	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
400	Reconciliation of loss before income tax to net cash flows from operations [Abstract]	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
401	Net loss	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
402	Adjustment for non-cash income and expense items [Abstract]	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
403	Depreciation and impairment	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
404	Share-based payments expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
405	Net foreign exchange (gain)/loss	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
406	Net gain on available-for-sale investments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnAvailableforsaleFinancialAssets
407	Change in assets and liabilities [Abstract]	Abstract			plll:ChangeInAssetsAndLiabilitiesAbstract
408	(Increase)/decrease in trade and other receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
409	Increase in trade and other payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
410	Decrease in provisions	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
411	Exchange differences arising on translation of foreign operations	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationNetOfTax
412	Net cash outflow from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
413	090600 - Disclosure - TRADE AND OTHER RECEIVABLES (Details)	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherReceivablesDetails
414	Implied Table	Table	*	*	implied:Table
415	TRADE AND OTHER RECEIVABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
416	Accrued interest receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInterestReceivable
417	Deposits	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAdvancesToSuppliers
418	GST receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
419	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
420	090700 - Disclosure - EXPLORATION AND EVALUATION ASSETS, Areas of Interest (Details)	Network	*	*	http://piedmontlithium.com/role/ExplorationAndEvaluationAssetsAreasOfInterestDetails
421	Exploration and evaluation assets [Table]	Table	*	*	plll:ExplorationAndEvaluationAssetsTable
422	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
423	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
424	Piedmont Lithium Project [Member]	Member			plll:PiedmontLithiumProjectMember
425	Yalgoo Gold Project [Member]	Member			plll:YalgooGoldProjectMember
426	Exploration And Evaluation Assets [Line Items]	LineItems			plll:ExplorationAndEvaluationAssetsLineItems
427	Areas of Interest [Abstract]	Abstract			plll:AreasOfInterestAbstract
428	Carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
429	Surface area of property	Concept (num:areaItemType)	For Period		plll:ExplorationAndEvaluationAssetsAreaOfLand
430	090702 - Disclosure - EXPLORATION AND EVALUATION ASSETS, Reconciliation (Details)	Network	*	*	http://piedmontlithium.com/role/ExplorationAndEvaluationAssetsReconciliationDetails
431	Implied Table	Table	*	*	implied:Table
432	EXPLORATION AND EVALUATION ASSETS [Abstract]	Abstract			plll:EXPLORATIONANDEVALUATIONASSETSAbstract
433	Reconciliation [Abstract]	Abstract			plll:ReconciliationOfChangesInExplorationAndEvaluationAssetsAbstract
434	Carrying amount, beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
435	Additions	Concept (Monetary)	For Period	Debit	plll:AdditionsExplorationAndEvaluationAssets
436	Impairment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossExplorationAndEvaluationAssets
437	Exchange differences	Concept (Monetary)	For Period	Debit	plll:IncreaseDecreaseThroughNetExchangeDifferencesExplorationAndEvaluationAssets
438	Carrying amount, end of period	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
439	090800 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, Plant and Equipment (Details)	Network	*	*	http://piedmontlithium.com/role/PropertyPlantAndEquipmentPlantAndEquipmentDetails
440	Disclosure of detailed information about property, plant and equipment [Table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
441	Carrying amount, accumulated depreciation, amortization and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
442	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
443	At Cost [Member]	Member			ifrs-full:GrossCarryingAmountMember
444	Accumulated Depreciation and Impairment [Member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
445	Disclosure of detailed information about property, plant and equipment [Line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
446	Plant and Equipment [Abstract]	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
447	Plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
448	090802 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, Reconciliation (Details)	Network	*	*	http://piedmontlithium.com/role/PropertyPlantAndEquipmentReconciliationDetails
449	Implied Table	Table	*	*	implied:Table
450	PROPERTY, PLANT AND EQUIPMENT [Abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
451	Reconciliation [Abstract]	Abstract			ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
452	Carrying amount, beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
453	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
454	Depreciation	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
455	Exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
456	Carrying amount, end of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
457	090900 - Disclosure - TRADE AND OTHER PAYABLES (Details)	Network	*	*	http://piedmontlithium.com/role/TradeAndOtherPayablesDetails
458	Implied Table	Table	*	*	implied:Table
459	TRADE AND OTHER PAYABLES [Abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
460	Trade creditors	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
461	Accrued expenses	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsClassifiedAsCurrent
462	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
463	091000 - Disclosure - CONTRIBUTED EQUITY, Issued Capital (Details)	Network	*	*	http://piedmontlithium.com/role/ContributedEquityIssuedCapitalDetails
464	Implied Table	Table	*	*	implied:Table
465	CONTRIBUTED EQUITY [Abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
466	559,030,352 fully paid ordinary shares (2017: 454,030,352) (2016: 397,808,129)	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
467	Fully paid ordinary shares outstanding (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
468	091002 - Disclosure - CONTRIBUTED EQUITY, Movements in Issued Capital (Details)	Network	*	*	http://piedmontlithium.com/role/ContributedEquityMovementsInIssuedCapitalDetails
469	Implied Table	Table	*	*	implied:Table
470	CONTRIBUTED EQUITY [Abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
471	Number of Ordinary Shares [Abstract]	Abstract			ifrs-full:NumberOfSharesIssuedAbstract
472	Number of ordinary shares, Opening balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
473	Share placement (in shares)	Concept (Shares)	For Period		ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
474	Exercise of incentive options (in shares)	Concept (Shares)	For Period		plll:NumberOfSharesExerciseOfOptionsEquity
475	Number of ordinary shares, Closing balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
476	Issue Price [Abstract]	Abstract			plll:IssuePriceAbstract
477	Share placement (in dollars per share)	Concept (Share)	For Period		plll:PricePerShareSharesIssued
478	Exercise of incentive options (in dollars per share)	Concept (Share)	For Period		plll:PricePerShareExerciseOfOptionsEquity
479	Issue Capital [Abstract]	Abstract			ifrs-full:ReconciliationOfNumberOfSharesOutstandingAbstract
480	Issued capital, Opening balance	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
481	Share placement	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
482	Exercise of incentive options	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
483	Transfer from share-based payment reserve	Concept (Monetary)	For Period	Credit	plll:IncreaseDecreaseThroughShareBasedPaymentTransactionsReserveEquity
484	Share issue costs	Concept (Monetary)	For Period	Debit	ifrs-full:ShareIssueRelatedCost
485	Issued capital, Closing balance	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
486	Meetings of Members [Abstract]	Abstract			plll:MeetingsOfMembersAbstract
487	Quorum, number of shareholders	Concept (Integer)	For Period		plll:QuorumNumberOfShareholders
488	Voting [Abstract]	Abstract			plll:VotingAbstract
489	Number of votes for each eligible voter present	Concept (Integer)	For Period		plll:ProportionalVotingRightsHeldBy
490	Number of votes eligible for each fully paid share	Concept (Integer)	For Period		plll:ProportionalVotingRightsPerFullyPaidShare
491	Changes to the Constitution [Abstract]	Abstract			plll:ChangesToConstitutionAbstract
492	Minimum percentage of present meeting members required to amend Company Constitution	Concept (Percent)	For Period		plll:CompanyConstitutionAmendmentMinimumPercentageOfPresentMemberVotesRequired
493	Minimum written notice required to propose special resolution	Concept (xbrli:durationItemType)	For Period		plll:WrittenNoticeToProposeSpecialResolutionMinimumPeriod
494	091100 - Disclosure - RESERVES (Details)	Network	*	*	http://piedmontlithium.com/role/ReservesDetails
495	Implied Table	Table	*	*	implied:Table
496	RESERVES [Abstract]	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
497	Share-based payments reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
498	Foreign currency translation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
499	Capital reserve	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalReserve
500	091102 - Disclosure - RESERVES, Movements in Share-based Payments Reserve (Details)	Network	*	*	http://piedmontlithium.com/role/ReservesMovementsInSharebasedPaymentsReserveDetails
501	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
502	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
503	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
504	Subsequent Events [Member]	Member			plll:SubsequentEventsMember
505	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
506	Movements in share-based payments reserve [Abstract]	Abstract			ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsAbstract
507	Opening balance, Number of incentive options (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
508	Number of incentive share options granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
509	Number of incentive share options exercised (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
510	Closing balance, Number of incentive options (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
511	Opening balance, Number of performance rights (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
512	Number of performance rights granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
513	Number of performance rights expiry/lapsed (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
514	Closing balance, Number of performance rights (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
515	Opening balance, Share-based payments reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
516	Exercise of incentive options	Concept (Monetary)	For Period	Credit	plll:ShareOptionsExercisedInShareBasedPaymentArrangementValue
517	Share-based payment expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
518	Closing balance, Share-based payments reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
519	Number of incentive share options issued (in shares)	Concept (Decimal)	For Period		plll:NumberOfShareOptionsIssuedInShareBasedPaymentArrangement
520	Number of performance rights issued (in shares)	Concept (Decimal)	For Period		plll:NumberOfOtherEquityInstrumentsIssuedInShareBasedPaymentArrangement
521	091104 - Disclosure - RESERVES, Terms and Conditions of Incentive Options (Details)	Network	*	*	http://piedmontlithium.com/role/ReservesTermsAndConditionsOfIncentiveOptionsDetails
522	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
523	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
524	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
525	Incentive Options [Member]	Member			plll:IncentiveOptionsMember
526	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
527	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
528	Exercisable at A$0.05 Expiring on December 31, 2019 [Member]	Member			plll:ShareBasedPaymentAwardExpiringOneMember
529	Exercisable at A$0.08 Expiring on December 31, 2019 [Member]	Member			plll:ShareBasedPaymentAwardExpiringTwoMember
530	Exercisable at A$0.10 Expiring on December 31, 2019 [Member]	Member			plll:ShareBasedPaymentAwardExpiringThreeMember
531	Exercisable at A$0.15 Expiring on December 31, 2019 [Member]	Member			plll:ShareBasedPaymentAwardExpiringFourMember
532	Exercisable at A$0.15 Expiring on June 30, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringFiveMember
533	Exercisable at A$0.20 Expiring on June 30, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringSixMember
534	Exercisable at A$0.25 Expiring on June 30, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringSevenMember
535	Exercisable at A$0.10 Expiring July 10, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringEightMember
536	Exercisable at A$0.12 Expiring January 10, 2021 [Member]	Member			plll:ShareBasedPaymentAwardExpiryNineMember
537	Exercisable at A$0.16 Expiring July 10, 2021 [Member]	Member			plll:ShareBasedPaymentAwardExpiringTenMember
538	Exercisable at A$0.24 Expiring July 10, 2022 [Member]	Member			plll:ShareBasedPaymentAwardExpiringElevenMember
539	Exercisable at A$0.35 Expiring December 31, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringTwelveMember
540	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
541	Terms and conditions of incentive options [Abstract]	Abstract			plll:TermsAndConditionsOfIncentiveOptionsAbstract
542	Right to holder to subscribe shares upon exercise (in shares)	Concept (Shares)	For Period		plll:ShareBasedPaymentArrangementSubscriptionRights
543	Options exercisable (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
544	Exercise price (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:ExercisePriceShareOptionsGranted
545	091106 - Disclosure - RESERVES, Terms and Conditions of Performance Rights (Details)	Network	*	*	http://piedmontlithium.com/role/ReservesTermsAndConditionsOfPerformanceRightsDetails
546	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
547	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
548	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
549	Performance Rights [Member]	Member			plll:PerformanceRightsMember
550	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
551	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
552	Exercisable at A$0.25 Expiring on December 31, 2018 [Member]	Member			plll:ShareBasedPaymentAwardExpiringFourteenMember
553	Exercisable at A$0.25 Expiring on December 31, 2019 [Member]	Member			plll:ShareBasedPaymentAwardExpiringFifteenMember
554	Exercisable at A$0.25 Expiring on December 31, 2020 [Member]	Member			plll:ShareBasedPaymentAwardExpiringThirteenMember
555	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
556	Terms and conditions of performance rights [Abstract]	Abstract			plll:TermsAndConditionsOfPerformanceRightsAbstract
557	Number of shares converted upon vesting (in shares)	Concept (Shares)	For Period		plll:ConversionOfShareBasedPaymentAwardNumberOfSharesConvertedFromVestingOfEachRight
558	Expiration of outstanding performance rights (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
559	091108 - Disclosure - RESERVES, Movements in Foreign Currency Translation Reserve (Details)	Network	*	*	http://piedmontlithium.com/role/ReservesMovementsInForeignCurrencyTranslationReserveDetails
560	Implied Table	Table	*	*	implied:Table
561	RESERVES [Abstract]	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
562	Movements in foreign currency translation reserve [Abstract]	Abstract			plll:MovementsInForeignCurrencyTranslationReserveAbstract
563	Foreign currency translation reserve, Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
564	Exchange differences arising on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
565	Foreign currency translation reserve, Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
566	091200 - Disclosure - ACCUMULATED LOSSES (Details)	Network	*	*	http://piedmontlithium.com/role/AccumulatedLossesDetails
567	Implied Table	Table	*	*	implied:Table
568	ACCUMULATED LOSSES [Abstract]	Abstract			plll:AccumulatedLossesAbstract
569	Balance, period start	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
570	Net loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
571	Balance, period end	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
572	091300 - Disclosure - EARNINGS PER SHARE (Details)	Network	*	*	http://piedmontlithium.com/role/EarningsPerShareDetails
573	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
574	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
575	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
576	Subsequent Events [Member]	Member			plll:SubsequentEventsMember
577	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
578	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
579	Incentive Options [Member]	Member			plll:IncentiveOptionsMember
580	Performance Rights [Member]	Member			plll:PerformanceRightsMember
581	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
582	Conversions, calls, subscriptions or issues [Abstract]	Abstract			plll:ConversionsCallsSubscriptionsOrIssuesAbstract
583	Number of ordinary shares issued upon conversion (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
584	Number of options converted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
585	091300 - Disclosure - EARNINGS PER SHARE (Details)	Network	*	*	http://piedmontlithium.com/role/EarningsPerShareDetails
586	Implied Table	Table	*	*	implied:Table
587	EARNINGS PER SHARE [Abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
588	Basic and diluted loss per share [Abstract]	Abstract			ifrs-full:BasicAndDilutedEarningsPerShareAbstract
589	Basic loss per share (cents per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
590	Diluted loss per share (cents per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
591	Income and share data used in calculations of basic earnings per share [Abstract]	Abstract			ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityAbstract
592	Net loss	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
593	Earnings used in calculating basic and dilutive earnings per share	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
594	Weighted average ordinary shares and adjusted weighted average ordinary shares [Abstract]	Abstract			ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
595	Weighted average number of ordinary shares used in calculating basic and dilutive earnings per share (in shares)	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
596	Non-Dilutive Securities [Abstract]	Abstract			plll:NonDilutiveSecuritiesAbstract
597	Anti-dilutive incentive options (in shares)	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
598	Anti-dilutive performance rights (in shares)	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
599	Potential ordinary shares considered anti-dilutive (in shares)	Concept (Shares)	For Period		plll:DilutiveEffectOfShareOptionsAndConvertibleInstrumentsOnNumberOfOrdinaryShares
600	091400 - Disclosure - RELATED PARTIES (Details)	Network	*	*	http://piedmontlithium.com/role/RelatedPartiesDetails
601	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
602	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
603	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
604	Piedmont Lithium, Inc. [Member]	Member			plll:PiedmontLithiumIncMember
605	Gaston Land Company, LLC [Member]	Member			plll:GastonLandCompanyLLCMember
606	WCP Gold Pty Ltd [Member]	Member			plll:WCPGoldPtyLtdMember
607	WCP Copper Pty Ltd [Member]	Member			plll:WCPCopperPtyLtdMember
608	Mt Phillips Exploration Pty Ltd [Member]	Member			plll:MtPhillipsExplorationPtyLtdMember
609	WCP Energy Pty Ltd [Member]	Member			plll:WCPEnergyPtyLtdMember
610	WCP Phosphate Pty Ltd [Member]	Member			plll:WCPPhosphatePtyLtdMember
611	Separate management entities [axis]	Axis			ifrs-full:SeparateManagementEntitiesAxis
612	Separate management entities [member]	Member			ifrs-full:SeparateManagementEntitiesMember
613	Apollo Group Pty Ltd [Member]	Member			plll:ApolloGroupPtyLtdMember
614	Ledger Holdings Pty Ltd [Member]	Member			plll:LedgerHoldingsPtyLtdMember
615	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
616	Subsidiaries [Abstract]	Abstract			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
617	Country of incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
618	Equity interest	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
619	Number of subsidiaries deregistered	Concept (Integer)	For Period		plll:NumberOfSubsidiariesDeregistered
620	Key Management Personnel [Abstract]	Abstract			plll:KeyManagementPersonnelAbstract
621	Short-term employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
622	Post-employment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
623	Termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits
624	Share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
625	Total compensation	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
626	Loans provided to or received from key management personnel	Concept (Monetary)	As Of	Debit	plll:KeyManagementPersonnelLoansProvidedToOrReceivedFrom
627	Transactions with related parties of Key Management Personnel [Abstract]	Abstract			ifrs-full:RelatedPartyTransactionsAbstract
628	Provision of services provided by separate management entity	Concept (Monetary)	For Period	Debit	ifrs-full:AmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity
629	Monthly retainer	Concept (Monetary)	For Period	Debit	plll:PeriodicRetainerAmount
630	Notice period for agreement termination	Concept (xbrli:durationItemType)	For Period		plll:NoticePeriodForAgreementTermination
631	091500 - Disclosure - SHARE-BASED PAYMENTS, Recognised Share-based Payment Expense (Details)	Network	*	*	http://piedmontlithium.com/role/SharebasedPaymentsRecognisedSharebasedPaymentExpenseDetails
632	Implied Table	Table	*	*	implied:Table
633	SHARE-BASED PAYMENTS [Abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
634	(Expense)/benefit arising from equity-settled share-based payment transactions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
635	091502 - Disclosure - SHARE-BASED PAYMENTS, Summary of Options and Performance Rights Granted as Share-Based Payments (Details)	Network	*	*	http://piedmontlithium.com/role/SharebasedPaymentsSummaryOfOptionsAndPerformanceRightsGrantedAsSharebasedPaymentsDetails
636	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
637	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
638	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
639	Series 1 [Member]	Member			plll:SeriesOneMember
640	Series 2 [Member]	Member			plll:SeriesTwoMember
641	Series 3 [Member]	Member			plll:SeriesThreeMember
642	Series 4 [Member]	Member			plll:SeriesFourMember
643	Series 5 [Member]	Member			plll:SeriesFiveMember
644	Series 6 [Member]	Member			plll:SeriesSixMember
645	Series 7 [Member]	Member			plll:SeriesSevenMember
646	Series 8 [Member]	Member			plll:SeriesEightMember
647	Series 9 [Member]	Member			plll:SeriesNineMember
648	Series 10 [Member]	Member			plll:SeriesTenMember
649	Series 11 [Member]	Member			plll:SeriesElevenMember
650	Series 12 [Member]	Member			plll:SeriesTwelveMember
651	Series 13 [Member]	Member			plll:SeriesThirteenMember
652	Series 14 [Member]	Member			plll:SeriesFourteenMember
653	Series 15 [Member]	Member			plll:SeriesFifteenMember
654	Series 16 [Member]	Member			plll:SeriesSixteenMember
655	Series 17 [Member]	Member			plll:SeriesSeventeenMember
656	Series 18 [Member]	Member			plll:SeriesEighteenMember
657	Series 19 [Member]	Member			plll:SeriesNineteenMember
658	Series 20 [Member]	Member			plll:SeriesTwentyMember
659	Series 21 [Member]	Member			plll:SeriesTwentyOneMember
660	Series 22 [Member]	Member			plll:SeriesTwentyTwoMember
661	Series 23 [Member]	Member			plll:SeriesTwentyThreeMember
662	Series 24 [Member]	Member			plll:SeriesTwentyFourMember
663	Series 25 [Member]	Member			plll:SeriesTwentyFiveMember
664	Series 26 [Member]	Member			plll:SeriesTwentySixMember
665	Series 27 [Member]	Member			plll:SeriesTwentySevenMember
666	Series 28 [Member]	Member			plll:SeriesTwentyEightMember
667	Series 29 [Member]	Member			plll:SeriesTwentyNineMember
668	Series 30 [Member]	Member			plll:SeriesThirtyMember
669	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
670	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
671	Options [Member]	Member			plll:IncentiveOptionsMember
672	Rights [Member]	Member			plll:PerformanceRightsMember
673	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
674	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
675	Subsequent Events [Member]	Member			plll:SubsequentEventsMember
676	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
677	Number of outstanding instruments [Abstract]	Abstract			plll:NumberOfOutstandingInstrumentsAbstract
678	Outstanding at beginning of year (in shares)	Concept (Shares)	As Of		plll:NumberOfInstrumentsOutstandingInShareBasedPaymentArrangement
679	Granted during the year (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsGrantedInSharebasedPaymentArrangement
680	Lapsed during the year (in shares)	Concept (Shares)	For Period		plll:NumberOfInstrumentsExpiredInShareBasedPaymentArrangement
681	Exercised during the year (in shares)	Concept (Shares)	For Period		plll:NumberOfInstrumentsExercisedInShareBasedPaymentArrangement
682	Outstanding at end of year (in shares)	Concept (Shares)	As Of		plll:NumberOfInstrumentsOutstandingInShareBasedPaymentArrangement
683	Number of incentive share options issued (in shares)	Concept (Decimal)	For Period		plll:NumberOfShareOptionsIssuedInShareBasedPaymentArrangement
684	Number of performance rights issued (in shares)	Concept (Decimal)	For Period		plll:NumberOfOtherEquityInstrumentsIssuedInShareBasedPaymentArrangement
685	Weighted average exercise price of instruments [Abstract]	Abstract			plll:WeightedAverageExercisePriceOfInstrumentsAbstract
686	Outstanding at beginning of year (in dollars per share)	Concept (Share)	As Of		plll:WeightedAverageExercisePriceOfInstrumentsOutstandingInShareBasedPaymentArrangement
687	Granted during the year (in dollars per share)	Concept (Share)	For Period		plll:WeightedAverageExercisePriceOfInstrumentsGrantedInShareBasedPaymentArrangement
688	Lapsed during the year (in dollars per share)	Concept (Share)	For Period		plll:WeightedAverageExercisePriceOfInstrumentsExpiredInShareBasedPaymentArrangement
689	Exercised during the year (in dollars per share)	Concept (Share)	For Period		plll:WeightedAverageExercisePriceOfInstrumentsExercisedInShareBasedPaymentArrangement
690	Outstanding at end of year (in dollars per share)	Concept (Share)	As Of		plll:WeightedAverageExercisePriceOfInstrumentsOutstandingInShareBasedPaymentArrangement
691	Incentive options and performance rights [Abstract]	Abstract			plll:IncentiveOptionsAndPerformanceRightsGrantedAsShareBasedPaymentsAbstract
692	Number (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
693	Number (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
694	Grant date	Concept (Text/String)	For Period		ifrs-full:DateOfGrantOfSharebasedPaymentArrangement
695	Expiry date	Concept (Date)	For Period		plll:DateOfExpiryOfShareBasedPaymentArrangement
696	Exercise price (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
697	Exercise price (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
698	Fair value (in dollars per share)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
699	Fair Value (in dollars per share)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
700	091504 - Disclosure - SHARE-BASED PAYMENTS, Weighted Average Remaining Contractual Life, Exercise Price and Fair Value (Details)	Network	*	*	http://piedmontlithium.com/role/SharebasedPaymentsWeightedAverageRemainingContractualLifeExercisePriceAndFairValueDetails
701	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
702	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
703	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
704	Incentive Options [Member]	Member			plll:IncentiveOptionsMember
705	Range [axis]	Axis			ifrs-full:RangeAxis
706	Ranges [member]	Member			ifrs-full:RangesMember
707	Minimum [Member]	Member			ifrs-full:BottomOfRangeMember
708	Maximum [Member]	Member			ifrs-full:TopOfRangeMember
709	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
710	Weighted Average Remaining Contractual Life [Abstract]	Abstract			plll:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingInstrumentsAbstract
711	Weighted average remaining contractual life (in years)	Concept (Decimal)	As Of		plll:WeightedAverageRemainingContractualLifeOfOutstandingInstruments
712	Range of Exercise Prices [Abstract]	Abstract			plll:DisclosureOfRangeOfExercisePricesOfGrantShareOptionsAbstract
713	Exercise price (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
714	Weighted Average Fair Value [Abstract]	Abstract			plll:WeightedAverageFairValueAbstract
715	Weighted average fair value (in dollars per share)	Concept (Monetary)	For Period	Credit	plll:WeightedAverageFairValueOfEquityInstrumentsGranted
716	091506 - Disclosure - SHARE-BASED PAYMENTS, Option and Rights Pricing Models (Details)	Network	*	*	http://piedmontlithium.com/role/SharebasedPaymentsOptionAndRightsPricingModelsDetails
717	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
718	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
719	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
720	Incentive Options [Member]	Member			plll:IncentiveOptionsMember
721	Performance Rights [Member]	Member			plll:PerformanceRightsMember
722	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
723	Valuation model used for instruments granted [Abstract]	Abstract			plll:ValuationModelUsedForInstrumentsGrantedAbstract
724	Fair value at grant date (weighted average) (in dollars per share)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
725	Fair value at grant date (weighted average) (in dollars per share)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
726	Share price at grant date (weighted average) (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageSharePriceShareOptionsGranted
727	Share price at grant date (weighted average) (in dollars per share)	Concept (Monetary)	For Period		plll:WeightedAverageSharePriceEquityInstrumentsGranted
728	Exercise price (weighted average) (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:ExercisePriceShareOptionsGranted
729	Exercise price (weighted average) (in dollars per share)	Concept (Monetary)	For Period		plll:ExercisePriceOtherEquityInstrumentsGranted
730	Expected life of options/rights (weighted average years)	Concept (Decimal)	For Period		plll:ExpectedLifeOfInstruments
731	Risk-free interest rate (weighted average)	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
732	Expected volatility	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
733	Expected dividend yield	Concept (Percent)	For Period		ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
734	091600 - Disclosure - SEGMENT INFORMATION (Details)	Network	*	*	http://piedmontlithium.com/role/SegmentInformationDetails
735	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
736	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
737	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
738	United States of America [Member]	Member			country:US
739	Australia [Member]	Member			country:AU
740	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
741	Reconciliation of non-current assets by geographical location [Abstract]	Abstract			plll:ReconciliationOfNonCurrentAssetsByGeographicalLocationAbstract
742	Number of operating segments	Concept (Integer)	For Period		plll:OperatingSegmentsNumber
743	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
744	091700 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES, Credit Risk (Details)	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPoliciesCreditRiskDetails
745	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
746	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
747	Risks [member]	Member			ifrs-full:TypesOfRisksMember
748	Credit Risk [Member]	Member			ifrs-full:CreditRiskMember
749	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
750	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
751	Cash and Cash Equivalents [Member]	Member			plll:CashAndCashEquivalentMember
752	Trade and Other Receivables [Member]	Member			plll:TradeAndOtherReceivablesMember
753	Disclosure of nature and extent of risks arising from financial instruments [line items]	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
754	Maximum credit risk exposure [Abstract]	Abstract			ifrs-full:DisclosureOfCreditRiskExposureAbstract
755	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
756	Exposure to bad debts	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
757	Impairment losses recognized on receivables	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossRecognisedInProfitOrLossTradeReceivables
758	091702 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES, Liquidity Risk (Details)	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPoliciesLiquidityRiskDetails
759	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
760	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
761	Risks [member]	Member			ifrs-full:TypesOfRisksMember
762	Liquidity Risk [Member]	Member			ifrs-full:LiquidityRiskMember
763	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
764	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
765	Trade and Other Payables [Member]	Member			plll:TradeAndOtherPayablesMember
766	Maturity [axis]	Axis			ifrs-full:MaturityAxis
767	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
768	Less Than or Equal to 6 Months [Member]	Member			plll:NotLaterThanSixMonthsMember
769	6-12 Months [Member]	Member			ifrs-full:LaterThanSixMonthsAndNotLaterThanOneYearMember
770	1-5 Years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
771	More Than or Equal to 5 Years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
772	Disclosure of nature and extent of risks arising from financial instruments [line items]	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
773	Financial Liabilities [Abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
774	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
775	091704 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES, Interest Rate Risk (Details)	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPoliciesInterestRateRiskDetails
776	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
777	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
778	Risks [member]	Member			ifrs-full:TypesOfRisksMember
779	Interest Rate Risk [Member]	Member			ifrs-full:InterestRateRiskMember
780	1% [Member]	Member			plll:InterestRateRiskPercentChangeIncreaseMember
781	-1% [Member]	Member			plll:InterestRateRiskPercentChangeDecreaseMember
782	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
783	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
784	Floating Interest Rate [Member]	Member			ifrs-full:FloatingInterestRateMember
785	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
786	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
787	Cash at Bank and on Hand [Member]	Member			plll:CashAtBanksAndOnHandMember
788	Short Term Deposits [Member]	Member			plll:ShortTermDepositsMember
789	Cash and Cash Equivalents [Member]	Member			plll:CashAndCashEquivalentMember
790	Disclosure of nature and extent of risks arising from financial instruments [line items]	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
791	Interest-bearing financial instruments [Abstract]	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateAbstract
792	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
793	Weighted average interest rate on cash at bank on hand and short-term deposits	Concept (Percent)	As Of		plll:WeightedAverageInterestRateOnDeposits
794	Amount of Increase (Decrease) on Equity and Profit or Loss [Abstract]	Abstract			plll:AmountOfIncreaseDecreaseOnEquityAndProfitOrLossAbstract
795	Profit or loss	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
796	Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
797	091706 - Disclosure - FINANCIAL RISK MANAGEMENT OBJECTIVES AND POLICIES, Foreign Currency Risk (Details)	Network	*	*	http://piedmontlithium.com/role/FinancialRiskManagementObjectivesAndPoliciesForeignCurrencyRiskDetails
798	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
799	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
800	Risks [member]	Member			ifrs-full:TypesOfRisksMember
801	Foreign Currency Risk [Member]	Member			ifrs-full:CurrencyRiskMember
802	10% Increase [Member]	Member			plll:CurrencyRiskIncreaseThroughForeignExchangeRatesMember
803	10% Decrease [Member]	Member			plll:CurrencyRiskDecreaseThroughForeignExchangeRatesMember
804	Currency [Axis]	Axis			srt:CurrencyAxis
805	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
806	US$ [Member]	Member			currency:USD
807	A$ [Member]	Member			currency:AUD
808	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
809	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
810	Cash and Cash Equivalents [Member]	Member			plll:CashAndCashEquivalentMember
811	Trade and Other Receivables [Member]	Member			plll:TradeAndOtherReceivablesMember
812	Trade and Other Payables [Member]	Member			plll:TradeAndOtherPayablesMember
813	Disclosure of nature and extent of risks arising from financial instruments [line items]	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
814	Cash reserves	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
815	Financial Assets [Abstract]	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
816	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
817	Financial Liabilities [Abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
818	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
819	Net exposure	Concept (Monetary)	As Of	Debit	plll:NetFinancialAssetsLiabilities
820	US Dollar Appreciated or Depreciated Against Australian Dollar [Abstract]	Abstract			plll:USDollarAppreciatedOrDepreciatedAgainstTheAustralianDollarAbstract
821	Profit or loss	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnChangeInValueOfForeignCurrencyBasisSpreadsNetOfTax
822	Other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxChangeInValueOfForeignCurrencyBasisSpreads
823	091800 - Disclosure - CONTINGENT ASSETS AND LIABILITIES (Details)	Network	*	*	http://piedmontlithium.com/role/ContingentAssetsAndLiabilitiesDetails
824	Disclosure of Contingent Assets and Liabilities [Table]	Table	*	*	plll:DisclosureOfContingentAssetsAndLiabilitiesTable
825	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
826	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
827	Piedmont Lithium Project [Member]	Member			plll:PiedmontLithiumProjectMember
828	Range [axis]	Axis			ifrs-full:RangeAxis
829	Ranges [member]	Member			ifrs-full:RangesMember
830	Minimum [Member]	Member			ifrs-full:BottomOfRangeMember
831	Maximum [Member]	Member			ifrs-full:TopOfRangeMember
832	Disclosure of contingent assets and liabilities [Line Items]	LineItems			plll:DisclosureOfContingentAssetsAndLiabilitiesLineItems
833	Increase decrease in assets and liabilities [Abstract]	Abstract			plll:IncreaseDecreaseInAssetsAndLiabilitiesAbstract
834	Area of property	Concept (num:areaItemType)	For Period		plll:ExplorationAndEvaluationAssetsAreaOfLand
835	Percentage of cash consideration paid if purchased	Concept (Percent)	As Of		plll:ContingentAdditionalConsiderationPercentageOfCashConsideration
836	Production royalty payable	Concept (Per Unit)	For Period		plll:ProductionRoyaltyPerTonne
837	091900 - Disclosure - COMMITMENTS (Details)	Network	*	*	http://piedmontlithium.com/role/CommitmentsDetails
838	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
839	Maturity [axis]	Axis			ifrs-full:MaturityAxis
840	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
841	Payable Within 1 Year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
842	Payable Later than 1 Year Within 5 Years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
843	Disclosure of finance lease and operating lease by lessee [Line items]	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
844	Commitments [Abstract]	Abstract			ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpenseAbstract
845	Operating lease commitments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
846	Land option payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayable
847	Lease commitments	Concept (Monetary)	As Of	Credit	ifrs-full:LeaseLiabilities
848	092000 - Disclosure - EVENTS SUBSEQUENT TO BALANCE DATE (Details)	Network	*	*	http://piedmontlithium.com/role/EventsSubsequentToBalanceDateDetails
849	Disclosure of non-adjusting events after reporting period [table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
850	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
851	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
852	Subsequent Events [Member]	Member			plll:SubsequentEventsMember
853	Disclosure of non-adjusting events after reporting period [line items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
854	Events subsequent to balance date [Abstract]	Abstract			plll:EventSubsequentToBalanceDateAbstract
855	Area of property	Concept (num:areaItemType)	For Period		plll:ExplorationAndEvaluationAssetsAreaOfLand