COSAN LTD. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	1001 - Document - Document and Entity Information	Network	*	*	http://www.cosan.com.br/taxonomy/role/DocumentandEntityInformation
2	Document Information [Table]	Table	*	*	dei:DocumentInformationTable
3	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
4	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
5	Class A common shares [Member]	Member			czz:ClassACommonSharesMember
6	Class B common shares [Member]	Member			czz:ClassBCommonSharesMember
7	Document Information [Line Items]	LineItems			dei:DocumentInformationLineItems
8	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
9	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
10	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
11	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
12	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
13	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
14	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
15	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
16	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
17	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
18	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
19	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
20	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
21	1003 - Statement - Consolidated statements of financial position	Network	*	*	http://www.cosan.com.br/taxonomy/role/StatementOfFinancialPositionCurrentNonCurrent-210000
22	Implied Table	Table	*	*	implied:Table
23	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
24	Assets	Abstract			ifrs-full:AssetsAbstract
25	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
26	Marketable securities	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
27	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
28	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
29	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
30	Receivables from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
31	Income tax receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
32	Other current tax receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
33	Dividends receivable	Concept (Monetary)	As Of	Debit	czz:DividendsReceivable1
34	Other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
35	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
36	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
37	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentTradeReceivables
38	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
39	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
40	Receivables from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesDueFromRelatedParties
41	Income tax receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsNoncurrent
42	Other non-current tax receivable	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesFromTaxesOtherThanIncomeTax
43	Judicial deposits	Concept (Monetary)	As Of	Debit	ifrs-full:LongtermDeposits
44	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentDerivativeFinancialAssets
45	Other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
46	Investments in associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
47	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
48	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
49	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
50	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
51	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
52	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
53	Loans, borrowings and debentures	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
54	Leases	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinanceLeaseLiabilities
55	Real estate credit certificates	Concept (Monetary)	As Of	Credit	czz:CurrentRealEstateCreditCertificates
56	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
57	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
58	Employee benefits payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentRecognisedLiabilitiesDefinedBenefitPlan
59	Income tax payables	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
60	Other taxes payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
61	Concessions payables	Concept (Monetary)	As Of	Credit	czz:CurrentConcessionsPayables
62	Dividends payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDividendPayables
63	Payables to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
64	Deferred revenue	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredIncomeClassifiedAsCurrent
65	Other financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentFinancialLiabilities
66	Other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentLiabilities
67	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
68	Loans, borrowings and debentures	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
69	Leases	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinanceLeaseLiabilities
70	Real estate credit certificates	Concept (Monetary)	As Of	Credit	czz:NoncurrentRealEstateCreditCertificates
71	Preferred shareholders payable in subsidiaries	Concept (Monetary)	As Of	Credit	czz:PreferredShareholdersPayableSubsidiariesNonCurrent
72	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentDerivativeFinancialLiabilities
73	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesToTradeSuppliers
74	Other taxes payable	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
75	Provision for legal proceedings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermLegalProceedingsProvision
76	Concessions payables	Concept (Monetary)	As Of	Credit	czz:NoncurrentConcessionsPayables
77	Post-employment benefits	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentRecognisedLiabilitiesDefinedBenefitPlan
78	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
79	Deferred revenue	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredIncomeClassifiedAsNoncurrent
80	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
81	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
82	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
83	Shareholders' equity	Abstract			ifrs-full:EquityAbstract
84	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
85	Additional paid-in capital	Concept (Monetary)	As Of	Credit	ifrs-full:AdditionalPaidinCapital
86	Accumulated other comprehensive loss	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
87	Retained earnings	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
88	Equity attributable to:	Abstract			czz:ShareholdersEquityAttributableToAbstract
89	Owners of the Company	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
90	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
91	Total shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
92	Total shareholders' equity and liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
93	1004 - Statement - Consolidated statements of profit or loss and other comprehensive income	Network	*	*	http://www.cosan.com.br/taxonomy/role/StatementOfComprehensiveIncomeProfitOrLossByFunctionOfExpense-310000
94	Implied Table	Table	*	*	implied:Table
95	Profit or loss [abstract]	Abstract			ifrs-full:IncomeStatementAbstract
96	Net sales	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
97	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
98	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
99	Selling expenses	Concept (Monetary)	For Period	Debit	czz:SellingExpenses
100	General and administrative expenses	Concept (Monetary)	For Period	Debit	czz:GeneralAndAdministrativeExpenses
101	Other income (expenses), net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherOperatingIncomeExpense
102	Operating expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OperatingExpense
103	Income before interest in earnings of investees and financial results	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
104	Interest in earnings of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
105	Interest in earnings of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
106	Interest in earnings of investees	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
107	Finance expense	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
108	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
109	Foreign exchange, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
110	Derivatives	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
111	Financial results, net	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncomeCost
112	Profit before taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
113	Income tax (expenses) benefits	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
114	Current	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
115	Deferred	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
116	Income tax (expenses) benefits	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
117	Profit (loss) from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
118	(Loss) profit from discontinued operation, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
119	Profit (loss) for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
120	Other comprehensive income (loss)	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
121	Items that will never be reclassified to profit or loss	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
122	Actuarial loss on defined benefit plan	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
123	Taxes over actuarial loss on defined benefit plan	Concept (Monetary)	For Period	Debit	czz:TaxEffectOnActuarialGainsLossesOnDefinedBenefitObligations
124	Gain on share subscription of subsidiary	Concept (Monetary)	For Period	Credit	czz:GainOnShareSubscriptionOfSubsidiary
125	Items that will never be reclassified to profit or loss	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
126	Items that are or may subsequently be reclassified to profit or loss:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
127	Foreign currency translation effect	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
128	Gain (loss) on cash flow hedge in joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxCashFlowHedges
129	Changes in fair value of available for sale securities	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxAvailableforsaleFinancialAssets
130	Taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss
131	Items that are or may be reclassified to profit or loss	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
132	Total other comprehensive income, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
133	Comprehensive income-Continued operation	Concept (Monetary)	For Period	Credit	czz:ComprehensiveIncomeFromContinuingOperation
134	Comprehensive income-Discontinued operation	Concept (Monetary)	For Period	Credit	czz:ComprehensiveIncomeLossFromDiscontinuedOperations
135	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
136	Total net income attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
137	Owners of the Parent	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
138	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
139	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
140	Total comprehensive income attributable to:	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
141	Owners of the Company	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
142	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
143	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
144	Basic (loss) earnings per share from: Continuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
145	Discontinuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
146	Total basic earnings (loss) per share	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
147	Diluted (loss) earnings per share from: Continuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromContinuingOperations
148	Discontinuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromDiscontinuedOperations
149	Total diluted earnings (loss) per share	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
150	1005 - Statement - Consolidated statements of changes in equity	Network	*	*	http://www.cosan.com.br/taxonomy/role/StatementOfChangesInEquity-610000
151	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
152	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
153	Equity [member]	Member			ifrs-full:EquityMember
154	Share capital [member]	Member			ifrs-full:IssuedCapitalMember
155	Additional paid-in capital [member]	Member			ifrs-full:AdditionalPaidinCapitalMember
156	Accumulated other comprehensive income [member]	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
157	Retained earnings [member]	Member			ifrs-full:RetainedEarningsMember
158	Equity attributable to owners of the company [member]	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
159	Non-controlling interest [member]	Member			ifrs-full:NoncontrollingInterestsMember
160	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
161	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
162	Net profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
163	Other comprehensive income:	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
164	Gain (loss) on cash flow hedge in joint ventures and subsidiary	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
165	Foreign currency translation effects	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
166	Actuarial loss on defined benefit plan	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
167	Investment property	Concept (Monetary)	For Period		ifrs-full:GainsLossesOnFairValueAdjustmentInvestmentProperty
168	Fair value of financial assets	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
169	Gain on share subscription of an subsidiary	Concept (Monetary)	For Period	Credit	czz:GainOnShareSubscriptionOfSubsidiary
170	Change in fair value of available for sale securities	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
171	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	czz:ComprehensiveIncomeFromContinuingOperation
172	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
173	Contributions by and distributions to owners of the Company:	Abstract			czz:ContributionsByAndDistributionsToOwnersOfParentAbstract
174	Share options exercised-Subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
175	Capital increase in subsidiary	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseInNoncontrollingInterestsArisingFromCashCapitalIncreaseOfSubsidiary
176	Dividends-non-controlling interests	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
177	Dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
178	Write-off of investment	Concept (Monetary)	For Period	Debit	czz:WriteOffOfInvestment
179	Treasury shares acquired	Concept (Monetary)	For Period	Debit	ifrs-full:PurchaseOfTreasuryShares
180	Share-based payment transactions	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
181	Total contributions by and distributions to owners of the Company	Concept (Monetary)	For Period	Credit	czz:ContributionsByAndDistributionsToOwnersOfParent
182	Transactions with owners of the Company	Abstract			czz:TransactionsWithOwnersOfParentAbstract
183	Change of shareholding interest in subsidiary	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
184	Business combination-ALL	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAcquisitionOfSubsidiary
185	Share buyback cost - Rumo	Concept (Monetary)	For Period	Debit	czz:ShareBuybackCost
186	Transactions with owners of the Company	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners
187	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
188	1006 - Statement - Consolidated statements of cash flows	Network	*	*	http://www.cosan.com.br/taxonomy/role/StatementOfCashFlowsIndirectMethod-520000
189	Implied Table	Table	*	*	implied:Table
190	Statement of cash flows [abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
191	Cash flows from operating activities	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
192	Profit before taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
193	Adjustments for:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
194	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
195	Lease and concession	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForLeaseAndConcession
196	Interest in earnings of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
197	Interest in earnings of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
198	Losses on disposals of assets	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
199	Share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
200	Legal proceedings provision	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForProvisions
201	Indexation charges, interest and exchange, net	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForIndexationChargesInterestAndExchangeNet
202	Provisions for employee benefits	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForEmployeeBenefitsProvisions
203	Allowance for doubtful accounts	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForAllowanceForDoubtfulAccounts
204	Deferred revenue	Concept (Monetary)	For Period	Credit	czz:AdjustmentsForDeferredRevenue
205	Sales of credit rights	Concept (Monetary)	For Period	Credit	czz:AdjustmentsForCreditSalesToThirdParty
206	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
207	Adjustments to reconcile profit (loss)	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForReconcileProfitLoss
208	Changes in:	Abstract			czz:ChangeInOperatingAssetsAndLiabilitiesAbstract
209	Trade receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
210	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
211	Recoverable taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncomeTaxExpense
212	Related parties	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForDecreaseIncreaseInDueFromRelatedParties
213	Trade payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
214	Other financial liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInOtherOperatingPayables
215	Employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
216	Provision for legal proceedings	Concept (Monetary)	For Period	Debit	czz:IncreaseDecreaseInProvisionForLegalProceedings
217	Judicial deposits	Concept (Monetary)	For Period	Debit	czz:IncreaseDecreaseInJudicialDeposits
218	Post-employment benefits	Concept (Monetary)	For Period	Credit	czz:AdjustmentForIncreaseDecreaseInPostEmploymentBenefits
219	Income tax and other tax	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseInIncomeTaxAndOtherTax
220	Discontinued operation	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
221	Concessions payable	Concept (Monetary)	For Period	Credit	czz:AdjustmentsInConcessionsPayable
222	Other assets and liabilities, net	Concept (Monetary)	For Period	Debit	czz:AdjustmentsForIncreaseDecreaseInOtherAssetsAndLiabilities
223	Changes in assets and liabilities	Concept (Monetary)	As Of	Debit	czz:ChangesInOperatingAssetsAndLiabilities
224	Net cash generated by operating activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesContinuingOperations
225	Cash flows from investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
226	Capital contribution in associates	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
227	Non-controlling interest acquisition	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
228	Marketable securities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments
229	Restricted cash	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents
230	Dividends received from associates	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedFromAssociatesClassifiedAsInvestingActivities
231	Dividends received from joint ventures	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedFromJointVenturesClassifiedAsInvestingActivities
232	Discontinued operation	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations
233	Put option exercised paid	Concept (Monetary)	For Period	Credit	czz:PutOptionExercisedPaid
234	Acquisition of subsidiary, net of cash acquired	Concept (Monetary)	For Period	Credit	czz:BusinessCombinationNetOfCashAcquired
235	Acquisition of property, plant and equipment, intangible assets and investments	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets
236	Net cash from sale of discontinued operations	Concept (Monetary)	For Period	Debit	czz:ProceedsFromDisposalOfDiscontinuedOperations
237	Related parties	Concept (Monetary)	For Period	Debit	czz:ProceedsFromRelatedParties
238	Cash received on sale of fixed assets, and intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets
239	Net cash used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesContinuingOperations
240	Cash flows from financing activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
241	Loans and borrowings and debentures raised	Concept (Monetary)	For Period	Debit	czz:LoansAndBorrowingsAndDebenturesRaised
242	Amortization of principal on loans, borrowings and debentures	Concept (Monetary)	For Period	Credit	czz:AmortizationOfPrincipalOfLoansBorrowingsAndDebentures
243	Payment of interest on loans, borrowings and debentures	Concept (Monetary)	For Period	Credit	czz:PaymentOfInterestOfLoansBorrowingsAndDebentures
244	Derivative financial instruments	Concept (Monetary)	For Period	Credit	czz:DerivativeFinancialInstrumentsClassifiedAsFinancingActivities
245	Amortization of principal on financing leases	Concept (Monetary)	For Period	Credit	czz:AmortizationOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
246	Payment of interest on financing leases	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
247	Real estate credit certificates	Concept (Monetary)	For Period	Debit	czz:AdjustmentForIncreaseDecreaseInAdvanceRealEstateReceipts
248	Proceeds from issuing shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
249	Related parties	Concept (Monetary)	For Period	Credit	czz:ProceedsFromRelatedPartiesClassifiedAsFinancialActivities
250	Non-controlling interest subscription	Concept (Monetary)	For Period	Debit	czz:SaleOfNoncontrollingInterestsInSubsidiariesClassifiedAsFinancingActivities
251	Discontinued operation	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations
252	Dividends paid	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
253	Acquisition of non-controlling interest	Concept (Monetary)	For Period	Credit	czz:PaymentForAcquisitionOfNoncontrollingInterests
254	Payments to redeem entity's shares	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
255	Share options exercised-subsidiaries	Concept (Monetary)	For Period	Credit	czz:ShareOptionsExercisedToSubsidiariesClassifiedAsFinancingActivities
256	Net cash used in financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesContinuingOperations
257	(Decrease) increase in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
258	Cash and cash equivalents at beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
259	Effect of exchange rate fluctuations on cash held	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
260	Cash and cash equivalents at end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
261	Supplemental cash flow information	Abstract			czz:SupplementalCashFlowInformation1Abstract
262	Income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefund
263	1007 - Disclosure - Operations	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOperationsExplanatory
264	Implied Table	Table	*	*	implied:Table
265	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
266	Operations	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOperationsExplanatory
267	1008 - Disclosure - Basis of preparation	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
268	Implied Table	Table	*	*	implied:Table
269	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
270	Basis of preparation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
271	1009 - Disclosure - Significant accounting policies	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
272	Implied Table	Table	*	*	implied:Table
273	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
274	Significant accounting policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
275	1010 - Disclosure - New standards and interpretations not yet effective	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfAccountingPronouncementsNotYetAdoptedExplanatory
276	Implied Table	Table	*	*	implied:Table
277	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
278	New standards and interpretations not yet effective	Concept (Text Block (HTML))	For Period		czz:DisclosureOfAccountingPronouncementsNotYetAdoptedExplanatory
279	1011 - Disclosure - Operating segments	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntitysReportableSegmentsExplanatory
280	Implied Table	Table	*	*	implied:Table
281	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
282	Operating segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
283	1012 - Disclosure - Cash and cash equivalents	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatory
284	Implied Table	Table	*	*	implied:Table
285	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
286	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
287	1013 - Disclosure - Marketable securities and Restricted cash	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfMarketableSecuritiesAndRestrictedCashExplanatory
288	Implied Table	Table	*	*	implied:Table
289	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
290	Marketable securities and Restricted cash	Concept (Text Block (HTML))	For Period		czz:DisclosureOfMarketableSecuritiesAndRestrictedCashExplanatory
291	1014 - Disclosure - Trade receivables	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatory
292	Implied Table	Table	*	*	implied:Table
293	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
294	Trade receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
295	1015 - Disclosure - Other current tax receivables	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCurrentTaxReceivablesExplanatory
296	Implied Table	Table	*	*	implied:Table
297	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
298	Other current tax receivables	Concept (Text Block (HTML))	For Period		czz:DisclosureOfCurrentTaxReceivablesExplanatory
299	1016 - Disclosure - Other financial assets	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherFinancialAssetsExplanatory
300	Implied Table	Table	*	*	implied:Table
301	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
302	Other financial assets	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOtherFinancialAssetsExplanatory
303	1017 - Disclosure - Inventories	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatory
304	Implied Table	Table	*	*	implied:Table
305	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
306	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
307	1018 - Disclosure - Related parties	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatory
308	Implied Table	Table	*	*	implied:Table
309	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
310	Related parties	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
311	1019 - Disclosure - Investments in associates	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
312	Implied Table	Table	*	*	implied:Table
313	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
314	Investments in associates	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
315	1020 - Disclosure - Investments in joint ventures	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfJointVenturesExplanatory
316	Implied Table	Table	*	*	implied:Table
317	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
318	Investments in joint ventures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfJointVenturesExplanatory
319	1021 - Disclosure - Property, plant and equipment	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatory
320	Implied Table	Table	*	*	implied:Table
321	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
322	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
323	1022 - Disclosure - Intangible assets and goodwill	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsAndGoodwillExplanatory
324	Implied Table	Table	*	*	implied:Table
325	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
326	Intangible assets and goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsAndGoodwillExplanatory
327	1023 - Disclosure - Loans, borrowings and debentures	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingCostsExplanatory
328	Implied Table	Table	*	*	implied:Table
329	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
330	Loans, borrowings and debentures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingCostsExplanatory
331	1024 - Disclosure - Leases	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfLeasesExplanatory
332	Implied Table	Table	*	*	implied:Table
333	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
334	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfLeasesExplanatory
335	1025 - Disclosure - Concessions payable	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfConcessionsPayableExplanatory
336	Implied Table	Table	*	*	implied:Table
337	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
338	Concessions payable	Concept (Text Block (HTML))	For Period		czz:DisclosureOfConcessionsPayableExplanatory
339	1026 - Disclosure - Commitments	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
340	Implied Table	Table	*	*	implied:Table
341	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
342	Commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
343	1027 - Disclosure - Trade payables	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherPayablesExplanatory
344	Implied Table	Table	*	*	implied:Table
345	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
346	Trade payables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
347	1028 - Disclosure - Other taxes payable	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherTaxesPayableExplanatory
348	Implied Table	Table	*	*	implied:Table
349	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
350	Other taxes payable	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOtherTaxesPayableExplanatory
351	1029 - Disclosure - Income tax and social contribution	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatory
352	Implied Table	Table	*	*	implied:Table
353	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
354	Income tax and social contribution	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
355	1030 - Disclosure - Provision for legal proceedings	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfProvisionsExplanatory
356	Implied Table	Table	*	*	implied:Table
357	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
358	Provision for legal proceedings	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProvisionsExplanatory
359	1031 - Disclosure - Preferred shareholders payable in subsidiaries	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfPreferredShareholdersPayableInSubsidiariesExplanatory
360	Implied Table	Table	*	*	implied:Table
361	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
362	Preferred shareholders payable in subsidiaries	Concept (Text Block (HTML))	For Period		czz:DisclosureOfPreferredShareholdersPayableInSubsidiariesExplanatory
363	1032 - Disclosure - Shareholders' equity	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
364	Implied Table	Table	*	*	implied:Table
365	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
366	Shareholders' equity	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
367	1033 - Disclosure - Earnings per share	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatory
368	Implied Table	Table	*	*	implied:Table
369	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
370	Earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
371	1034 - Disclosure - Net sales	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueExplanatory
372	Implied Table	Table	*	*	implied:Table
373	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
374	Net sales	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
375	1035 - Disclosure - Costs and expenses by nature	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfExpensesExplanatory
376	Implied Table	Table	*	*	implied:Table
377	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
378	Costs and expenses by nature	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfExpensesExplanatory
379	1036 - Disclosure - Other income (expenses), net	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherOperatingIncomeExpenseExplanatory
380	Implied Table	Table	*	*	implied:Table
381	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
382	Other income (expenses), net	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
383	1037 - Disclosure - Finance results	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialResultsExplanatory
384	Implied Table	Table	*	*	implied:Table
385	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
386	Finance results	Concept (Text Block (HTML))	For Period		czz:DisclosureOfFinancialResultsExplanatory
387	1038 - Disclosure - Financial instruments	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatory
388	Implied Table	Table	*	*	implied:Table
389	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
390	Financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
391	1039 - Disclosure - Post-employment benefits	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatory
392	Implied Table	Table	*	*	implied:Table
393	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
394	Post-employment benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
395	1040 - Disclosure - Share-based payment	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfSharebasedPaymentArrangementsExplanatory
396	Implied Table	Table	*	*	implied:Table
397	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
398	Share-based payment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
399	1041 - Disclosure - Subsequent events	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEventsAfterReportingPeriodExplanatory
400	Implied Table	Table	*	*	implied:Table
401	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
402	Subsequent events	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
403	1042 - Disclosure - Basis of preparation (Policies)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfBasisOfPreparationOfFinancialStatementsExplanatoryPolicies
404	Implied Table	Table	*	*	implied:Table
405	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
406	Statement of compliance	Concept (Text Block (HTML))	For Period		czz:DescriptionOfAccountingPolicyForStatementOfComplianceExplanatory
407	Functional and presentation currency	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory
408	Use of judgments and estimates	Concept (Text Block (HTML))	For Period		czz:DescriptionOfAccountingPolicyForUseOfJudgementsAndEstimatesExplanatory
409	Basis of measurement	Concept (Text Block (HTML))	For Period		czz:DescriptionOfAccountingPolicyForBasisOfMeasurementExplanatory
410	Basis of consolidation	Concept (Text Block (HTML))	For Period		czz:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
411	Foreign currency	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
412	Financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
413	Inventory	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
414	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
415	Intangible assets and goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
416	Impairment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
417	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
418	Employee benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
419	Revenue	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
420	Government grants	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants
421	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
422	Finance income and finance expense	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
423	Taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
424	Cash flow	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForCashFlowsExplanatory
425	1043 - Disclosure - Significant accounting policies (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryTables
426	Implied Table	Table	*	*	implied:Table
427	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
428	Summary of Basis of Consolidation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
429	1044 - Disclosure - Operating segments (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntitysReportableSegmentsExplanatoryTables
430	Implied Table	Table	*	*	implied:Table
431	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
432	Selected information by segment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
433	Summary of Net Sales by Segment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProductsAndServicesExplanatory
434	1045 - Disclosure - Cash and cash equivalents (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatoryTables
435	Implied Table	Table	*	*	implied:Table
436	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
437	Summary of Cash and Cash Equivalents	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedCashAndCashEquivalentsExplanatory
438	Summary of Financial Investments	Concept (Text Block (HTML))	For Period		czz:DisclosureOfFinancialInvestmentsExplanatory
439	1046 - Disclosure - Marketable securities and Restricted cash (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfMarketableSecuritiesAndRestrictedCashExplanatoryTables
440	Implied Table	Table	*	*	implied:Table
441	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
442	Summary of Marketable Securities	Concept (Text Block (HTML))	For Period		czz:DisclosureOfInformationOnMarketableSecuritiesExplanatory
443	Summary of Restricted Cash	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRestrictedCashAndCashEquivalentsExplanatory
444	1047 - Disclosure - Trade receivables (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatoryTables
445	Implied Table	Table	*	*	implied:Table
446	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
447	Summary of Trade Receivables	Concept (Text Block (HTML))	For Period		czz:DisclosureOfTradeReceivablesExplanatory
448	Summary of Ageing of Trade Receivables	Concept (Text Block (HTML))	For Period		czz:DisclosureOfAgeingOfTradeReceivablesExplanatory
449	Summary of Changes in Allowance for Doubtful Accounts	Concept (Text Block (HTML))	For Period		czz:ChangesInAllowanceForDoubtfulAccountsOfTradeReceivablesExplanatory
450	1048 - Disclosure - Other current tax receivables (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCurrentTaxReceivablesExplanatoryTables
451	Implied Table	Table	*	*	implied:Table
452	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
453	Summary of Other Current Tax Receivables	Concept (Text Block (HTML))	For Period		czz:DisclosureDetailsOfTradeReceivablesAndOtherCurrentAssetsExplanatory
454	1049 - Disclosure - Inventories (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatoryTables
455	Implied Table	Table	*	*	implied:Table
456	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
457	Summary of Inventories	Concept (Text Block (HTML))	For Period		czz:DisclosureOfCurrentInventoriesExplanatory
458	1050 - Disclosure - Related parties (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatoryTables
459	Implied Table	Table	*	*	implied:Table
460	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
461	Summary of Receivables from and Payables to Related Parties	Concept (Text Block (HTML))	For Period		czz:DisclosureOfAmountDueFromToRelatedPartyExplanatory
462	Summary of Related Party Transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
463	Summary of Officers' and Directors' Compensation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
464	1051 - Disclosure - Investments in associates (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatoryTables
465	Implied Table	Table	*	*	implied:Table
466	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
467	Summary of Information in Associates of Company and Company's Ownership	Concept (Text Block (HTML))	For Period		czz:DisclosureOfSummaryOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesExplanatory
468	Summary of Financial Information of Associates	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfSummarisedFinancialInformationOfAssociateAccountedForUsingEquityMethodToCarryingAmountOfInterestInAssociateExplanatory
469	Summary of Non-controlling Interests in Subsidiaries	Concept (Text Block (HTML))	For Period		czz:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesExplanatory
470	Summary of Financial Statements	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfConsolidatedAndSeparateFinancialStatementsExplanatory
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473	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
474	Summary of Changes to Investments in Joint Ventures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfSummarisedFinancialInformationOfJointVentureAccountedForUsingEquityMethodToCarryingAmountOfInterestInJointVentureExplanatory
475	1053 - Disclosure - Property, plant and equipment (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTables
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477	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
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479	1054 - Disclosure - Intangible assets and goodwill (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsAndGoodwillExplanatoryTables
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481	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
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483	Summary Intangible Assets (Excluding Goodwill)	Concept (Text Block (HTML))	For Period		czz:DisclosureOfIntangibleAssetsExcludingGoodwillExplanatory
484	Summary of Combined Carrying Amounts of Goodwill Allocated to Cash Generating Units	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGoodwillExplanatory
485	1055 - Disclosure - Loans, borrowings and debentures (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingCostsExplanatoryTables
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487	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
488	Summary of Loans, Borrowings and Debentures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
489	Summary of Summary of Non-current Borrowings	Concept (Text Block (HTML))	For Period		czz:DisclosureOfNoncurrentBorrowingsExplanatory
490	Summary of Carrying Amounts of Loans, Borrowings and Debentures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
491	1056 - Disclosure - Leases (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfLeasesExplanatoryTables
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493	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
494	Summary of Finance and Operating Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
495	Summary of Finance Lease movements	Concept (Text Block (HTML))	For Period		czz:DisclosureOfScheduleOfFinanceLeaseMovementsExplanatory
496	Future minimum lease payments under non-cancellable leases	Concept (Text Block (HTML))	For Period		czz:DisclosureOfFutureMinimumLeasePaymentsUnderNonCancellableOperatingLeaseExplanatory
497	1057 - Disclosure - Concessions payable (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfConcessionsPayableExplanatoryTables
498	Implied Table	Table	*	*	implied:Table
499	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
500	Summary of Concessions Payable	Concept (Text Block (HTML))	For Period		czz:DisclosureOfConcessionsPayableAndJudicialDepositsExplanatory
501	Summary of judicial deposits	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedInformationAboutJudicialDepositsExplanatory
502	1058 - Disclosure - Commitments (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatoryTables
503	Implied Table	Table	*	*	implied:Table
504	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
505	Summary of Regulatory Assets (Liabilities)	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesExplanatory
506	Summary of Future Minimum Lease Payments Under the Operating Leases	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOperatingLeasesFutureMinimumPaymentsExplanatory
507	1059 - Disclosure - Trade payables (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherPayablesExplanatoryTables
508	Implied Table	Table	*	*	implied:Table
509	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
510	Summary of Trade Payables	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedOfInformationAboutTradeAndOtherPayablesExplanatory
511	1060 - Disclosure - Other taxes payable (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherTaxesPayableExplanatoryTables
512	Implied Table	Table	*	*	implied:Table
513	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
514	Summary of Other Tax Payable	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOtherThanIncomeTaxExplanatory
515	Summary of Amounts Due on Non-Current Liabilities and Maturity Schedule	Concept (Text Block (HTML))	For Period		czz:DisclosureOfAmountsDueOnNoncurrentLiabilitiesOtherThanIncomeTaxExplanatory
516	1061 - Disclosure - Income tax and social contribution (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatoryTables
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519	Schedule of Reconciliation of Income and Social Contribution Tax Expenses	Concept (Text Block (HTML))	For Period		czz:DisclosureOfReconciliationBetweenStatutoryTaxRateAndEffectiveTaxExpensesRateExplanatory
520	Summary of Deferred Income Tax Assets and Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
521	Summary of Changes in Deferred Income Taxes, Net	Concept (Text Block (HTML))	For Period		czz:DisclosureOfChangesInDeferredIncomeTaxesExplanatory
522	1062 - Disclosure - Provision for legal proceedings (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfProvisionsExplanatoryTables
523	Statement [Table]	Table	*	*	us-gaap:StatementTable
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525	Litigation Case [Domain]	Member			czz:LitigationCaseDomain
526	Tax claims [member]	Member			czz:TaxClaimsMember
527	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
528	Summary of Provision for Legal Proceedings	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedInformationAboutProvisionsExplanatory
529	Summary Changes in Provision for Legal Procedings	Concept (Text Block (HTML))	For Period		czz:DisclosureOfChangesInProvisionExplanatory
530	Summary of Judicial Claims Deemed to be Probable Losses, Fully Accrued	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedInformationOfJudicialClaimsDeemedToBeProbableLossesFullyAccruedExplanatory
531	Summary of Judicial Claims Deemed as Possible Losses, and Therefore not Accrued	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedInformationOfJudicialClaimsDeemedAsPossibleLossesAndThereforeNotAccruedExplanatory
532	1063 - Disclosure - Shareholders' equity (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatoryTables
533	Implied Table	Table	*	*	implied:Table
534	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
535	Summary of Share Capital	Concept (Text Block (HTML))	For Period		czz:DisclosureOfClassesOfShareCapitalExplanatoryTextBlock
536	Summary of Other Comprehensive (Loss) Income	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailInfprmationOfComponentsOfOtherComprehensiveLossIncomeExplanatory
537	1064 - Disclosure - Earnings per share (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatoryTables
538	Implied Table	Table	*	*	implied:Table
539	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
540	Summary of Calculation of Earnings per Share	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
541	1065 - Disclosure - Net sales (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueExplanatoryTables
542	Implied Table	Table	*	*	implied:Table
543	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
544	Summary of Net Sales	Concept (Text Block (HTML))	For Period		czz:DisclosureOfNetSalesExplanatory
545	1066 - Disclosure - Costs and expenses by nature (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfExpensesExplanatoryTables
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548	Summary of Expenses by Nature/Purpose	Concept (Text Block (HTML))	For Period		czz:DisclosureOfOperatingExpensesIncludingCostOfSalesExplanatory
549	1067 - Disclosure - Other income (expenses), net (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherOperatingIncomeExpenseExplanatoryTables
550	Implied Table	Table	*	*	implied:Table
551	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
552	Summary of Details of Other Expense Income Net	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailsOtherExpenseIncomeExplanatory
553	1068 - Disclosure - Finance results (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialResultsExplanatoryTables
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556	Summary of Finance Results	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDetailedInformationAboutFinancialResultsExplanatory
557	1069 - Disclosure - Financial instruments (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatoryTables
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559	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
560	Summary of Carrying Amount of Financial Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsExplanatory
561	Summary of Carrying Amount of Financial Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
562	Summary of Derivative Financial Instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
563	Summary of Credit Risk	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCreditRiskExposureExplanatory
564	Summary of Credit Risk Rating	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfExternalCreditExposuresExplanatory
565	Summary of Non-derivative Financial Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
566	Summary of Net Exposure to Exchange Rate Variations on Assets and Liabilities	Concept (Text Block (HTML))	For Period		czz:DisclosureOfForeignExchangeRiskExplanatory
567	Summary of Sensitivity Analysis on Changes in Foreign Exchange Rates	Concept (Text Block (HTML))	For Period		czz:DisclosureOfForeignCurrencySensitivityAnalysisExplanatory
568	Summary of Sensitivity Analysis on Changes in Foreign Exchange Rates Impact on Profit Loss	Concept (Text Block (HTML))	For Period		czz:DisclosureOfForeignCurrencySensitivityAnalysisImpactOnProfitLossExplanatory
569	Summary of Sensitivity Analysis on Interest Rates on Loans and Borrowings	Concept (Text Block (HTML))	For Period		czz:DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesExplanatory
570	Summary of Probable Scenario Considers Estimated Interest Rate	Concept (Text Block (HTML))	For Period		czz:DisclosureOfInterestRateSensitivityAnalysisExplanatory
571	Summary of Market Value of Senior Notes that are listed on Luxembourg Stock Exchange	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDebtSecuritiesExplanatory
572	Summary of Carrying Amounts and Fair Value of Financial Assets and Financial Liabilities	Concept (Text Block (HTML))	For Period		czz:DisclosureOfScheduleOfCarryingAndFairValueOfFinancialAssetsAndLiabilitiesExplanatory
573	Summary of Hedge Accounting	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfHedgeAccountingExplanatory
574	1070 - Disclosure - Post-employment benefits (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatoryTables
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576	Text block1 [abstract]	Abstract			czz:TextBlock1Abstract
577	Summary of Post-employment Benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
578	Summary of Defined Benefit Obligation and Fair Value of Plan Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
579	Summary of Expense Recognized in Profit or Loss	Concept (Text Block (HTML))	For Period		czz:DisclosureOfExpenseIncomeRecognizedNetDefinedBenefitLiabilityAssetExplanatory
580	Summary of Amount Recognised as Accumulated Other Comprehensive Income	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDefinedBenefitPlanRecognisedInAOCIExplanatory
581	Summary of Plan Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
582	Summary of Assumptions to Determine Defined Benefit Obligations	Concept (Text Block (HTML))	For Period		czz:DisclosureOfDefinedBenefitPlanAssumptionsForBenefitObligationsExplanatory
583	Summary of Changes in Discount Rate	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
584	1071 - Disclosure - Share-based payment (Tables)	Network	*	*	http://www.cosan.com.br/taxonomy/role/NotesToFinancialStatementsDisclosureOfSharebasedPaymentArrangementsExplanatoryTables
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586	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
587	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
588	Cosan S.A. Industria e Comercio [member]	Member			czz:CosanSAIndustriaeComercioMember
589	Cosan S.A. [member]	Member			czz:CosanSAMember
590	Cosan Logistica [Member]	Member			czz:CosanLogsticaMember
591	Cosan Global Limited [Member]	Member			czz:CosanGlobalLimitedMember
592	Comgas [member]	Member			czz:COMGASMember
593	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
594	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
595	Equity-settled plans [member]	Member			czz:EquitysettledPlansMember
596	Cash-settled plans [member]	Member			czz:CashsettledPlansMember
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599	Summary of Number and Weighted-average Exercise Prices of Share Options Under Share Option Programs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
600	Schedule of Restricted Shares	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
601	1072 - Disclosure - Operations - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOperationsAdditionalInformation
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603	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
604	Entity [Domain]	Member			dei:EntityDomain
605	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
606	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
607	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
608	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
609	Rumo S.A. [member]	Member			czz:RumoSAMember
610	Subsidiary Comgas [member]	Member			czz:SubsidiaryComgasMember
611	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
612	Equity [member]	Member			ifrs-full:EquityMember
613	Capital Reserve [member]	Member			ifrs-full:CapitalReserveMember
614	Disclosure of background and operations [Line Items]	LineItems			czz:DisclosureOfBackgroundAndOperationsLineItems
615	Percentage of ownership held	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
616	Number of joint ventures	Concept (Integer)	For Period		czz:NumberOfJointVentures
617	Proceed from sale of part of Radar and Radar II shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
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620	PaymentsForReplacementStockOptionsAwards	Concept (Monetary)	For Period	Credit	czz:PaymentsForReplacementStockOptionsAwards
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622	Put options amount	Concept (Decimal)	As Of		czz:NumberOfPurchaseOptions
623	Percentage of put options	Concept (Percent)	For Period		czz:PercentageOfShareHolderinPutOption
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628	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
629	Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
630	Equity attributable to controlling shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
631	Equity attributable to non - controlling shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
632	1073 - Disclosure - Basis of Preparation - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureBasisOfPreparationAdditionalInformation
633	Implied Table	Table	*	*	implied:Table
634	Disclosure of basis of preparation of financial statements [abstract]	Abstract			czz:DisclosureOfBasisOfPreparationOfFinancialStatementsAbstract
635	Ownership interest percentage in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
636	1074 - Disclosure - Significant Accounting Policies - Summary of Cosan's Subsidiaries (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfCosansSubsidiaries
637	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
638	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
639	Entity [Domain]	Member			dei:EntityDomain
640	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
641	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
642	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticsSAMember
643	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
644	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
645	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
646	Cosan Biomassa SA [member]	Member			czz:CosanBiomassaSAMember
647	Cosan Cayman I I Limited [member]	Member			czz:CosanCaymanIILimitedMember
648	Cosan Global Limited [Member]	Member			czz:CosanGlobalLimitedMember
649	Cosan Investimentose Participacoes S A [member]	Member			czz:CosanInvestimentoseParticipacoesSAMember
650	Cosan Lubes Investments Limited [member]	Member			czz:CosanLubesInvestmentsLimitedMember
651	Comma Oil Chemicals Limited [member]	Member			czz:CommaOilChemicalsMember
652	Airport Energy Limited [member]	Member			czz:AirportEnergyLimitedMember
653	Airport Energy Services Limited [member]	Member			czz:AirportEnergyServicesLimitedMember
654	Wessesx Petroleum Limited [member]	Member			czz:WessesxPetroleumLimitedMember
655	Stanbridge Group Limited [member]	Member			czz:StanbridgeGroupLimitedMember
656	Cosan Lubrificantese Especialidades S A [member]	Member			czz:CosanLubrificanteseEspecialidadesSAMember
657	Cosan Luxembourg S A [member]	Member			czz:CosanLuxembourgSAMember
658	Cosan Overseas Limited [member]	Member			czz:CosanOverseasLimitedMember
659	Cosan Paraguay S A [member]	Member			czz:CosanParaguaySAMember
660	Cosan U.S Inc [member]	Member			czz:CosanUSIncMember
661	Rumo S.A. [member]	Member			czz:RumoSAMember
662	Logispot Armazens Gerais S A [member]	Member			czz:LogispotArmazensGeraisSAMember
663	Elevacoes Portuarias S A [member]	Member			czz:ElevacoesPortuariasSAMember
664	Rumo Luxembourg Sarl [member]	Member			czz:RumoLuxembourgSarlMember
665	Rumo Intermodal SA [member]	Member			czz:RumoIntermodalSAMember
666	Rumo Malha Oeste SA [member]	Member			czz:RumoMalhaOesteSAMember
667	Rumo Malha Paulista SA [member]	Member			czz:RumoMalhaPaulistaSAMember
668	Rumo Malha Sul SA [member]	Member			czz:RumoMalhaSulSAMember
669	Rumo Malha Norte SA [member]	Member			czz:RumoMalhaNorteSAMember
670	Boswells S A [member]	Member			czz:BoswellsSAMember
671	Brado Holding S A [member]	Member			czz:BradoHoldingSAMember
672	A L L Servicos Ltda [member]	Member			czz:ALLServicosLtdaMember
673	A L L Argentina S A [member]	Member			czz:ALLArgentinaSAMember
674	Paranagua S A [member]	Member			czz:ParanaguaSAMember
675	A L L Rail Management Ltda [member]	Member			czz:ALLRailManagementLtdaMember
676	A L L Armazens Gerais Ltda [member]	Member			czz:ALLArmazensGeraisLtdaMember
677	Portofer Ltda [member]	Member			czz:PortoferLtdaMember
678	Brado Logisticae Participacoes S A [member]	Member			czz:BradoLogisticaeParticipacoesSAMember
679	Brado Logistica S A [member]	Member			czz:BradoLogisticaSAMember
680	A L L Mesopotamica S A [member]	Member			czz:ALLMesopotamicaSAMember
681	A L L Central S A [member]	Member			czz:ALLCentralSAMember
682	Servicios De Inversion Logistica Integrales SA [member]	Member			czz:ServiciosDeInversionLogisticaIntegralesSAMember
683	Disclosure of subsidiaries [line items]	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
684	Proportion of ownership interest in subsidiary	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
685	1075 - Disclosure - Significant Accounting Policies - Summary of Cosan's Subsidiaries (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfCosansSubsidiariesParenthetical
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687	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
688	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
689	Rumo S.A. [member]	Member			czz:RumoSAMember
690	Disclosure of subsidiaries [line items]	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
691	Financial investments in securities	Concept (Shares)	For Period		czz:FinancialInvestmentsInSecuritiesIssuedBySubsidiary
692	Ownership percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
693	Net proceeds in Sales of stock in subsidiary	Concept (Monetary)	For Period	Credit	czz:GainsOrLossesRecognizedInShareholdersEquity
694	Uncovered liabilities	Concept (Monetary)	For Period	Credit	czz:UncoveredLiabilities
695	Stake rate	Concept (Percent)	For Period		czz:PercentageOwnershipOfStakeholder
696	1076 - Disclosure - Significant Accounting Policies - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformation
697	Disclosure of significant accounting policies [table]	Table	*	*	czz:DisclosureOfSignificantAccountingPoliciesTable
698	Range [axis]	Axis			ifrs-full:RangeAxis
699	Ranges [member]	Member			ifrs-full:RangesMember
700	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
701	Top of range [member]	Member			ifrs-full:TopOfRangeMember
702	Unconsolidated subsidiaries [axis]	Axis			ifrs-full:UnconsolidatedSubsidiariesAxis
703	Entity's total for unconsolidated subsidiaries [member]	Member			ifrs-full:EntitysTotalForUnconsolidatedSubsidiariesMember
704	A L L Malha Norte [member]	Member			czz:ALLMalhaNorteMember
705	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
706	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
707	Rumo S.A. [member]	Member			czz:RumoSAMember
708	Segments [axis]	Axis			ifrs-full:SegmentsAxis
709	Segments [member]	Member			ifrs-full:SegmentsMember
710	Logistics segment [member]	Member			czz:LogisticsSegmentMember
711	Disclosure of significant accounting policies [line items]	LineItems			czz:DisclosureOfSignificantAccountingPoliciesLineItems
712	Foreign currency exchange rate	Concept (Decimal)	As Of		czz:ForeignCurrencyExchangeRate
713	Hedged risk position percentage	Concept (Percent)	For Period		czz:HedgedRiskPositonPercentage
714	Number of locomotives	Concept (Integer)	For Period		czz:NumberOfLocomotives
715	Agreement date	Concept (Date)	For Period		czz:AgreementCommencementDate
716	Description of agreement related to intangible assets	Concept (Text/String)	For Period		czz:DescriptionOfAgreementOfIntangibleAssets
717	Description of contribution to defined contribution plan	Concept (Text/String)	For Period		czz:DescriptionOfContributionToDefinedContributionPlan
718	Percentage of decrease in income tax	Concept (Percent)	For Period		czz:PercentageOfDecreaseInIncomeTaxExpense
719	Income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
720	Percentage of operating revenue	Concept (Percent)	For Period		ifrs-full:PercentageOfEntitysRevenue
721	Percentage of applicable tax rate over profit	Concept (Percent)	For Period		czz:PercentageOfApplicableTaxRateOverProfit
722	Additional applicable tax rate	Concept (Percent)	For Period		czz:AdditionalApplicableTaxRate
723	Operating revenues	Concept (Monetary)	For Period	Credit	czz:OperatingRevenues
724	Percentage of applicable tax rate over profit for social contribution	Concept (Percent)	For Period		czz:PercentageOfApplicableTaxRateOverProfitForSocialContribution
725	Forward purchase of property, plant and equipment	Concept (Monetary)	For Period	Credit	czz:CapitalExpendituresIncurredButNotYetPaid1
726	1077 - Disclosure - Significant Accounting Policies - Summary of Depreciation, Estimated Useful Lives of the Assets (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfDepreciationEstimatedUsefulLivesOfTheAssets
727	Disclosure of significant accounting policies [table]	Table	*	*	czz:DisclosureOfSignificantAccountingPoliciesTable
728	Range [axis]	Axis			ifrs-full:RangeAxis
729	Ranges [member]	Member			ifrs-full:RangesMember
730	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
731	Top of range [member]	Member			ifrs-full:TopOfRangeMember
732	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
733	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
734	Buildings and improvements [member]	Member			czz:BuildingsAndImprovementsMember
735	Machinery, equipment and facilities [member]	Member			czz:MachineryEquipmentAndFacilitiesMember
736	Vehicles [member]	Member			ifrs-full:VehiclesMember
737	Railcars [member]	Member			czz:RailcarsMember
738	Locomotives [member]	Member			czz:LocomotivesMember
739	Permanent railways [member]	Member			czz:PermanentRailwaysMember
740	Fixtures and fittings [member]	Member			ifrs-full:FixturesAndFittingsMember
741	Computer equipment [member]	Member			ifrs-full:ComputerEquipmentMember
742	Disclosure of significant accounting policies [line items]	LineItems			czz:DisclosureOfSignificantAccountingPoliciesLineItems
743	Percentage of depreciation rate	Concept (Percent)	For Period		czz:PercentageOfDepreciationRate
744	1078 - Disclosure - New standards and interpretations not yet effective - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureNewStandardsAndInterpretationsNotYetEffectiveAdditionalInformation
745	Implied Table	Table	*	*	implied:Table
746	Disclosure of operating segments [abstract]	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
747	Amount of sales commissions recognized	Concept (Monetary)	For Period	Debit	czz:SalesCommissions
748	1079 - Disclosure - Operating Segments - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOperatingSegmentsAdditionalInformation
749	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
750	Segments [axis]	Axis			ifrs-full:SegmentsAxis
751	Segments [member]	Member			ifrs-full:SegmentsMember
752	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
753	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
754	Number of municipalities	Concept (Integer)	For Period		czz:NumberOfMunicipalities
755	1080 - Disclosure - Operating Segments - Summary of Income or Loss (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOperatingSegmentsSummaryOfIncomeOrLoss
756	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
757	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
758	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
759	Operating segments [member]	Member			ifrs-full:OperatingSegmentsMember
760	Unallocated amounts [member]	Member			ifrs-full:UnallocatedAmountsMember
761	Deconsolidation effects IFRS 11 [member]	Member			czz:DeconsolidationEffectsIFRS11Member
762	Elimination of intersegment amounts [member]	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
763	Segments [axis]	Axis			ifrs-full:SegmentsAxis
764	Segments [member]	Member			ifrs-full:SegmentsMember
765	Raizen Energia S.A. [member]	Member			czz:RaizenEnergiaMember
766	Raizen Combustiveis [member]	Member			czz:RaizenCombustiveisMember
767	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
768	Radar [Member]	Member			czz:RadarMember
769	Moove cash generating unit [member]	Member			czz:MooveMember
770	Logistics [member]	Member			czz:LogisticsMember
771	Cosan Corporate [member]	Member			czz:CosanCorporateMember
772	Cosan S.A. [member]	Member			czz:CosanSAMember
773	Cosan Logistica [member]	Member			czz:CosanLogisticaMember
774	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
775	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
776	Domestic market [member]	Member			ifrs-full:CountryOfDomicileMember
777	External market [member]	Member			ifrs-full:ForeignCountriesMember
778	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
779	Net sales	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
780	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
781	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
782	Selling expenses	Concept (Monetary)	For Period	Debit	czz:SellingExpenses
783	General and administrative expenses	Concept (Monetary)	For Period	Debit	czz:GeneralAndAdministrativeExpenses
784	Other income (expense), net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherOperatingIncomeExpense
785	Financial results	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncomeCost
786	Finance expense	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
787	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
788	Foreign exchange losses, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
789	Derivatives	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
790	Interest in earnings of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
791	Interest in earnings of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
792	Income tax expense benefit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
793	Profit (loss) from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
794	Profit from discontinued operation, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
795	Total net income attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
796	Owners of the Company	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
797	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
798	Profit loss	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
799	Other selected data:	Abstract			czz:OtherSelectedDataAbstract
800	Depreciation and amortization	Concept (Monetary)	For Period	Debit	czz:DepreciationAndAmortization1
801	EBITDA	Concept (Monetary)	For Period	Credit	czz:EarningsBeforeInterestTaxDepreciationAndAmortization
802	Additions to PP&E, intangible and biological assets	Concept (Monetary)	For Period	Debit	czz:AdditionsToPropertyPlantAndEquipmentIntangibleAndBiologicalAssets
803	Reconciliation of EBITDA:	Abstract			czz:ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract
804	Profit (loss) for the period	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
805	Income tax and social contribution	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
806	Financial result, net	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncomeCost
807	Depreciation and amortization	Concept (Monetary)	For Period	Debit	czz:DepreciationAndAmortization1
808	EBITDA	Concept (Monetary)	For Period	Credit	czz:EarningsBeforeInterestTaxDepreciationAndAmortization
809	1081 - Disclosure - Operating Segments - Summary of Financial Position (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOperatingSegmentsSummaryOfFinancialPosition
810	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
811	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
812	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
813	Operating segments [member]	Member			ifrs-full:OperatingSegmentsMember
814	Unallocated amounts [member]	Member			ifrs-full:UnallocatedAmountsMember
815	Deconsolidation effects IFRS 11 [member]	Member			czz:DeconsolidationEffectsIFRS11Member
816	Elimination of intersegment amounts [member]	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
817	Segments [axis]	Axis			ifrs-full:SegmentsAxis
818	Segments [member]	Member			ifrs-full:SegmentsMember
819	Raizen Energia S.A. [member]	Member			czz:RaizenEnergiaMember
820	Raizen Combustiveis [member]	Member			czz:RaizenCombustiveisMember
821	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
822	Moove cash generating unit [member]	Member			czz:MooveMember
823	Logistics [member]	Member			czz:LogisticsMember
824	Cosan Corporate [member]	Member			czz:CosanCorporateMember
825	Cosan S.A. [member]	Member			czz:CosanSAMember
826	Cosan Logistica [member]	Member			czz:CosanLogisticaMember
827	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
828	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
829	Marketable securities	Concept (Monetary)	As Of	Debit	czz:MarketableSecurities1
830	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
831	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:DerivativeFinancialAssets
832	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
833	Other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherFinancialAssets
834	Assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
835	Other current assets	Concept (Monetary)	As Of	Debit	czz:OtherCurrentAssetsOther
836	Other non-currentassets	Concept (Monetary)	As Of	Debit	czz:OtherNonCurrentAssetsOther
837	Investments in associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
838	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
839	Biological assets	Concept (Monetary)	As Of	Debit	ifrs-full:BiologicalAssets
840	Investment property	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
841	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
842	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
843	Loans, borrowings and debentures	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
844	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
845	Trade payables	Concept (Monetary)	As Of	Credit	czz:TradePayable
846	Real estate credit certificates	Concept (Monetary)	As Of	Credit	czz:RealEstateCreditCertificates
847	Employee benefits payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentRecognisedLiabilitiesDefinedBenefitPlan
848	Preferred shareholders payable in subsidiaries	Concept (Monetary)	As Of	Credit	czz:PreferredShareholdersPayableSubsidiariesNonCurrent
849	Lease	Concept (Monetary)	As Of	Credit	ifrs-full:FinanceLeaseLiabilities
850	Other current liabilities	Concept (Monetary)	As Of	Credit	czz:OtherCurrentLiabilitiesClassifiedAsOther
851	Other non-current liabilities	Concept (Monetary)	As Of	Credit	czz:OtherNoncurrentLiabilitiesOther
852	Total assets (net of liabilities) allocated by segment	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
853	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
854	Equity attributable to owners of the Company	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
855	Non-controllinginterests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
856	Total shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
857	1082 - Disclosure - Operating Segments - Summary of Net Sales by Segment (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOperatingSegmentsSummaryOfNetSalesBySegment
858	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
859	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
860	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
861	Operating segments [member]	Member			ifrs-full:OperatingSegmentsMember
862	Unallocated amounts [member]	Member			ifrs-full:UnallocatedAmountsMember
863	IFRS 11 - Deconsolidation of adjustments/eliminations joint ventures and eliminations [member]	Member			czz:DeconsolidationOfAdjustmentsEliminationsJointVenturesAndEliminationsMember
864	Segments [axis]	Axis			ifrs-full:SegmentsAxis
865	Segments [member]	Member			ifrs-full:SegmentsMember
866	Raizen Energia S.A. [member]	Member			czz:RaizenEnergiaMember
867	Raizen Combustiveis [member]	Member			czz:RaizenCombustiveisMember
868	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
869	Moove cash generating unit [member]	Member			czz:MooveMember
870	Logistics [member]	Member			czz:LogisticsMember
871	Cosan Corporate [member]	Member			czz:CosanCorporateMember
872	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
873	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
874	Ethanol [member]	Member			czz:EthanolMember
875	Sugar [member]	Member			czz:SugarMember
876	Cogeneration [member]	Member			czz:CogenerationMember
877	Other [member]	Member			czz:OtherMember
878	Fuels [member]	Member			czz:FuelsMember
879	Industrial [member]	Member			czz:IndustrialMember
880	Residential [member]	Member			czz:ResidentialMember
881	Thermal generation [member]	Member			czz:ThermalGenerationMember
882	Automotive [member]	Member			czz:AutomotiveMember
883	Commercial [member]	Member			czz:CommercialMember
884	Construction revenue [member]	Member			czz:ConstructionRevenueMember
885	Finished goods [member]	Member			czz:FinishedGoodsMember
886	Basic oil [member]	Member			czz:BasicOilMember
887	Container Operations [member]	Member			czz:ContainerOperationsMember
888	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
889	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
890	North Operation [member]	Member			czz:NorthOperationsMember
891	South Operation [member]	Member			czz:SouthOperationsMember
892	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
893	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
894	1083 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalents
895	Implied Table	Table	*	*	implied:Table
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898	Savings account	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
899	Financial investments	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
900	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
901	1084 - Disclosure - Cash and Cash Equivalents - Summary of Financial Investments (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfFinancialInvestments
902	Cash And Cash Equivalents [Table]	Table	*	*	czz:CashAndCashEquivalentsTable
903	Unconsolidated structured entities [axis]	Axis			ifrs-full:UnconsolidatedStructuredEntitiesAxis
904	Entity's total for unconsolidated structured entities [member]	Member			ifrs-full:EntitysTotalForUnconsolidatedStructuredEntitiesMember
905	Investment funds [member]	Member			ifrs-full:InvestmentFundsMember
906	Bank investments [member]	Member			czz:BankInvestmentsMember
907	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
908	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
909	Repurchase agreements [member]	Member			czz:RepurchaseAgreements1Member
910	Bank certificate of deposits - CDB [member]	Member			czz:BankCertificateOfDepositsMember
911	Other Bank Investments [member]	Member			czz:OtherBankInvestmentsMember
912	Cash and cash equivalents1 [line items]	LineItems			czz:CashAndCashEquivalents1LineItems
913	Financial investments	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
914	1085 - Disclosure - Marketable Securities - Summary of Marketable Securities (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfMarketableSecurities
915	Marketable Securities [Table]	Table	*	*	czz:MarketableSecuritiesTable
916	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
917	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
918	Government security [member]	Member			czz:GovernmentSecuritiesMember
919	Bank certificate of deposits - CDB [member]	Member			czz:BankCertificateOfDepositsMember
920	Disclosure of Marketable Securities [line items]	LineItems			czz:DisclosureOfMarketableSecuritiesLineItems
921	Marketable securities	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
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923	Disclosure of Restricted Cash and Cash Equivalents [Table]	Table	*	*	czz:DisclosureOfRestrictedCashAndCashEquivalentsTable
924	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
925	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
926	Investments linked to loans [member]	Member			czz:InvestmentsLinkedToLoansMember
927	Securities pledged as collateral [member]	Member			czz:SecuritiesPledgedAsCollateral1Member
928	Disclosure of Restricted Cash and Cash Equivalents [Line Items]	LineItems			czz:DisclosureOfRestrictedCashAndCashEquivalentsLineItems
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930	1087 - Disclosure - Marketable Securities - Summary of Marketable Securities (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfMarketableSecuritiesParenthetical
931	Marketable Securities [Table]	Table	*	*	czz:MarketableSecuritiesTable
932	Range [axis]	Axis			ifrs-full:RangeAxis
933	Ranges [member]	Member			ifrs-full:RangesMember
934	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
935	Top of range [member]	Member			ifrs-full:TopOfRangeMember
936	Disclosure of Marketable Securities [line items]	LineItems			czz:DisclosureOfMarketableSecuritiesLineItems
937	Bank certificate of deposits maturity period	Concept (xbrli:durationItemType)	For Period		czz:BankCertificateOfDepositsMaturityPeriod
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939	1088 - Disclosure - Trade Receivables - Summary of Trade Receivables (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureTradeReceivablesSummaryOfTradeReceivables
940	Disclosure of Trade Receivables [Table]	Table	*	*	czz:DisclosureOfTradeReceivablesTable
941	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
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943	Domestic - Brazilian Reais [member]	Member			czz:DomesticBrazilianReaisMember
944	Export - Foreign currency [member]	Member			czz:ExportForeignCurrencyMember
945	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
946	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
947	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
948	Allowance for doubtful accounts [member]	Member			us-gaap:AllowanceForDoubtfulAccountsMember
949	Disclosure of Trade Receivables [line items]	LineItems			czz:DisclosureOfTradeReceivablesLineItems
950	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
951	Current	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
952	Non-current	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentTradeReceivables
953	1089 - Disclosure - Trade Receivables - Summary of Ageing of Trade Receivables (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureTradeReceivablesSummaryOfAgeingOfTradeReceivables
954	Disclosure of Trade Receivables [Table]	Table	*	*	czz:DisclosureOfTradeReceivablesTable
955	Maturity [axis]	Axis			ifrs-full:MaturityAxis
956	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
957	Not overdue [member]	Member			czz:NotDueMember
958	Overdue From 1 to 30 days [member]	Member			czz:OverdueOneToThirtyDaysMember
959	Overdue From 31 to 60 days [member]	Member			czz:OverdueThirtyOneToSixtyDaysMember
960	Overdue From 61 to 90 days [member]	Member			czz:OverdueSixtyOneToNinetyDaysMember
961	More than 90 days [member]	Member			czz:MoreThanNinetyDaysMember
962	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
963	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
964	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
965	Allowance for doubtful accounts [member]	Member			us-gaap:AllowanceForDoubtfulAccountsMember
966	Disclosure of Trade Receivables [line items]	LineItems			czz:DisclosureOfTradeReceivablesLineItems
967	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
968	1090 - Disclosure - Trade Receivables - Summary of Changes in Allowance for Doubtful Accounts (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureTradeReceivablesSummaryOfChangesInAllowanceForDoubtfulAccounts
969	Implied Table	Table	*	*	implied:Table
970	Trade Receivables [Abstract]	Abstract			czz:TradeReceivablesAbstract
971	Beginning balance	Concept (Monetary)	As Of	Credit	czz:AllowanceForDoubtfulAccounts
972	Provision	Concept (Monetary)	For Period	Debit	czz:AllowanceForDoubtfulAccountsProvision
973	Reversal	Concept (Monetary)	For Period	Credit	czz:AllowanceForDoubtfulAccountsReversal
974	Ending balance	Concept (Monetary)	As Of	Credit	czz:AllowanceForDoubtfulAccounts
975	1091 - Disclosure - Other Current Tax Receivables - Summary of Other Current Tax Receivables (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOtherCurrentTaxReceivablesSummaryOfOtherCurrentTaxReceivables
976	Trade and Other Current Receivables [Table]	Table	*	*	czz:TradeAndOtherCurrentReceivablesTable
977	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
978	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
979	ICMS - State VAT [member]	Member			czz:ICMSTaxesMember
980	ICM SCIAP Taxes [member]	Member			czz:ICMSCIAPTaxesMember
981	Credit installment [member]	Member			czz:CreditInstallmentMember
982	COFINS - Revenue tax [member]	Member			czz:CofinsRevenueTaxMember
983	PIS - Revenue tax [member]	Member			czz:PISRevenueTaxMember
984	Other [member]	Member			czz:OtherTaxesMember
985	Trade and Other Current Receivables [line items]	LineItems			czz:TradeAndOtherCurrentReceivablesLineItems
986	Receivables from taxes other than income tax	Concept (Monetary)	As Of	Debit	ifrs-full:ReceivablesFromTaxesOtherThanIncomeTax
987	Current	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
988	Non-Current	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesFromTaxesOtherThanIncomeTax
989	1092 - Disclosure - Other financial assets - Additional information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOtherFinancialAssetsAdditionalInformation
990	Disclosure of other financial assets [table]	Table	*	*	czz:DisclosureOfOtherFinancialAssetsTable
991	Statement of comprehensive income, profit or loss location [axis]	Axis			czz:StatementOfComprehensiveIncomeProfitOrLossLocationAxis
992	Income Statement Location [Domain]	Member			us-gaap:IncomeStatementLocationDomain
993	Other revenue [member]	Member			czz:OtherRevenueMember
994	Events of reclassification of financial assets [axis]	Axis			ifrs-full:EventsOfReclassificationOfFinancialAssetsAxis
995	Events of reclassification of financial assets [member]	Member			ifrs-full:EventsOfReclassificationOfFinancialAssetsMember
996	Previously reported [member]	Member			czz:PreviouslyReportedMember
997	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
998	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
999	Other assets [member]	Member			ifrs-full:OtherAssetsMember
1000	Other liabilities [member]	Member			us-gaap:OtherLiabilitiesMember
1001	Disclosure of other financial assets [line items]	LineItems			czz:DisclosureOfOtherFinancialAssetsLineItems
1002	Credit rights	Concept (Monetary)	As Of	Debit	czz:CreditRightsAmount
1003	Legal fees	Concept (Monetary)	As Of	Credit	czz:LegalFeesAmount
1004	Credit rights net of tax	Concept (Monetary)	For Period	Credit	czz:CreditRightsNetOfTax
1005	Contingent asset	Concept (Monetary)	As Of	Debit	czz:ContingentAssets
1006	Financial discount recognized as financial expense	Concept (Monetary)	For Period	Debit	czz:FinancialDiscountRecognizedAsFinancialExpenses
1007	Assignment of trade receivables	Concept (Monetary)	For Period	Debit	czz:TransferOfTradeReceivables
1008	Gains on sale of credit rights net of tax	Concept (Monetary)	For Period	Credit	czz:GainsOnSaleOfCreditRightsNetOfTax
1009	1093 - Disclosure - Inventories - Summary of Inventories (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInventoriesSummaryOfInventories
1010	Implied Table	Table	*	*	implied:Table
1011	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1012	Finished goods	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
1013	Raw material for construction process	Concept (Monetary)	As Of	Debit	ifrs-full:RawMaterials
1014	Fuels and lubricants	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFuel
1015	Spare parts and accessories	Concept (Monetary)	As Of	Debit	ifrs-full:SpareParts
1016	Warehouse and others	Concept (Monetary)	As Of	Debit	czz:WarehouseAndOthers
1017	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1018	1094 - Disclosure - Inventories - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInventoriesAdditionalInformation
1019	Disclosure of inventories [table]	Table	*	*	czz:DisclosureOfInventoriesTable
1020	Valuation Allowances and Reserves Type [Axis]	Axis			us-gaap:ValuationAllowancesAndReservesTypeAxis
1021	Valuation Allowances and Reserves [Domain]	Member			us-gaap:ValuationAllowancesAndReservesDomain
1022	Inventory Valuation Reserve [Member]	Member			us-gaap:InventoryValuationReserveMember
1023	Disclosure of Inventories [Line Items]	LineItems			czz:DisclosureOfInventoriesLineItems
1024	Provision	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
1025	1095 - Disclosure - Related Parties - Summary of Receivables from and Payables to Related Parties (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureRelatedPartiesSummaryOfReceivablesFromAndPayablesToRelatedParties
1026	Disclosure of receivables and payables [table]	Table	*	*	czz:DisclosureOfReceivablesAndPayablesTable
1027	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1028	Segments [member]	Member			ifrs-full:SegmentsMember
1029	Commercial operations [member]	Member			czz:CommercialOperationMember
1030	Corporate operation agreements [member]	Member			czz:CorporateOperationAgreementsMember
1031	Receivables under the framework agreement [member]	Member			czz:ReceivablesUnderTheFrameworkAgreementMember
1032	Financial and corporation operations [member]	Member			czz:FinancialAndCorporationOperationsMember
1033	Corporate operation [member]	Member			czz:CorporateOperationMember
1034	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1035	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1036	Raizen Energia S.A. [member]	Member			czz:RazenEnergiaSAMember
1037	Aguassanta Participacoes S.A. [member]	Member			czz:AguassantaParticipacoesSAMember
1038	Radar Propriedades Agricolas S.A. [member]	Member			czz:RadarPropriedadesAgricolasSAMember
1039	Raizen Combustiveis S.A. [member]	Member			czz:RazenCombustveisSAMember
1040	Other [member]	Member			ifrs-full:OtherRelatedPartiesMember
1041	Janus Brasil Participacoes S.A. [member]	Member			czz:JanusBrasilParticipacoesSAMember
1042	Rezende Barbosa [member]	Member			czz:RezendeBarbosaMember
1043	Disclosure of receivables and payables [line items]	LineItems			czz:DisclosureOfReceivablesAndPayablesLineItems
1044	Receivables from related parties, current	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
1045	Receivables from related parties, non-current	Concept (Monetary)	As Of	Debit	czz:NoncurrentOtherReceivablesDueFromRelatedParties
1046	Receivables from related parties, non-current	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesDueFromRelatedParties
1047	Payables to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1048	1096 - Disclosure - Related Parties - Summary of Related Party Transactions (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureRelatedPartiesSummaryOfRelatedPartyTransactions
1049	Disclosure of receivables and payables [table]	Table	*	*	czz:DisclosureOfReceivablesAndPayablesTable
1050	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1051	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1052	Raizen Combustiveis S.A. [member]	Member			czz:RazenCombustveisSAMember
1053	Raizen Energia S.A. [member]	Member			czz:RazenEnergiaSAMember
1054	Raizen Energia S.A. [member]	Member			czz:RaizenEnergiaMember
1055	Usina Santa Luiza [member]	Member			czz:UsinaSantaLuizaMember
1056	Other [member]	Member			ifrs-full:OtherRelatedPartiesMember
1057	Assets and liabilities [axis]	Axis			ifrs-full:AssetsAndLiabilitiesAxis
1058	Assets and liabilities [member]	Member			ifrs-full:AssetsAndLiabilitiesMember
1059	Other [member]	Member			czz:OtherMember
1060	Disclosure of receivables and payables [line items]	LineItems			czz:DisclosureOfReceivablesAndPayablesLineItems
1061	Sales of goods and services	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1062	Purchase of goods / Inputs	Concept (Monetary)	For Period	Debit	ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1063	Discontinued operation	Concept (Monetary)	For Period	Debit	czz:DiscontinuedOperationsRelatedPartyTransactions
1064	Shared expense	Concept (Monetary)	For Period	Credit	czz:IncomeExpenseFromRelatedPartyTransactions
1065	Financial result	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
1066	1097 - Disclosure - Related Parties - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureRelatedPartiesAdditionalInformation
1067	Disclosure of receivables and payables [table]	Table	*	*	czz:DisclosureOfReceivablesAndPayablesTable
1068	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1069	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
1070	Commercial operations [member]	Member			czz:CommercialOperationMember
1071	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1072	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1073	Subsidiaries, associates and joint ventures [member]	Member			czz:SubsidiariesAssociatesAndJointVenturesMember
1074	Disclosure of receivables and payables [line items]	LineItems			czz:DisclosureOfReceivablesAndPayablesLineItems
1075	Doubtful loss	Concept (Monetary)	As Of	Credit	ifrs-full:ProvisionsForDoubtfulDebtsRelatedToOutstandingBalancesOfRelatedPartyTransaction
1076	1098 - Disclosure - Related Parties - Summary of Officers' and Directors' Compensation (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureRelatedPartiesSummaryOfOfficersAndDirectorsCompensation
1077	Implied Table	Table	*	*	implied:Table
1078	Disclosure of transactions between related parties [abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1079	Short-term benefits to officers and directors	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1080	Post-employment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1081	Other long-term benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationOtherLongtermBenefits
1082	Benefits from termination of employment contract	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits
1083	Share-based payment transactions	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1084	Officers' and directors' compensation	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
1085	1099 - Disclosure - Investments in Associates - Summary of Information in Associates of Company and Company's Ownership (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfInformationInAssociatesOfCompanyAndCompanysOwnership
1086	Disclosure of associates [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1087	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1088	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1089	Tellus Brasil Participacoes S.A. [member]	Member			czz:TellusBrasilParticipacoesSAMember
1090	Novvi Limited Liability Company [member]	Member			czz:NovviLimitedLiabilityCompanyMember
1091	Janus Brasil Participacoes S.A. [member]	Member			czz:JanusBrasilParticipacoesSAMember
1092	Radar Propriedades Agricolas S.A. [member]	Member			czz:RadarPropriedadesAgricolasSAMember
1093	Radar II Propriedades Agricolas S.A. [member]	Member			czz:RadarIIPropriedadesAgricolasSAMember
1094	Usina Santa Luiza SA [member]	Member			czz:UsinaSantaLuizaSAMember
1095	Other investments [member]	Member			us-gaap:OtherInvestmentsMember
1096	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1097	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1098	Associates [member]	Member			ifrs-full:AssociatesMember
1099	Disclosure of associates and joint ventures [line items]	LineItems			czz:DisclosureOfAssociatesAndJointVenturesLineItems
1100	Shares issued by the associate	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1101	Shares held by Cosan	Concept (Shares)	As Of		czz:NumberOfSharesHeldByParent
1102	Cosan ownership interest	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1103	Economic benefits %	Concept (Percent)	For Period		czz:ProportionOfEconomicBenefits
1104	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1105	Interest in earnings (losses) of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
1106	Reclassification from non-current assets held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:AmountRecognisedInOtherComprehensiveIncomeAndAccumulatedInEquityRelatingToNoncurrentAssetsOrDisposalGroupsHeldForSale
1107	Other comprehensive income	Concept (Monetary)	For Period	Credit	czz:ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod
1108	Dividends	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToNoncontrollingInterests
1109	Capital increase	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAppropriationOfRetainedEarnings
1110	Other	Concept (Monetary)	As Of	Debit	czz:OtherTransactions
1111	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1112	1100 - Disclosure - Investments in Associates - Summary of Financial Information of Associates (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfFinancialInformationOfAssociates
1113	Statement of financial statements [Table]	Table	*	*	czz:StatementOfFinancialStatementsTable
1114	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1115	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1116	Tellus Brasil Participacoes S.A. [member]	Member			czz:TellusBrasilParticipacoesSAMember
1117	Novvi Limited Liability Company [member]	Member			czz:NovviLimitedLiabilityCompanyMember
1118	Radar Propriedades Agricolas S.A. [member]	Member			czz:RadarPropriedadesAgricolasSAMember
1119	Radar II Propriedades Agricolas S.A. [member]	Member			czz:RadarIIPropriedadesAgricolasSAMember
1120	Janus Brasil Participacoes S.A. [member]	Member			czz:JanusBrasilParticipacoesSAMember
1121	Statement of financial statements [line items]	LineItems			czz:StatementOfFinancialStatementsLineItems
1122	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1123	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1124	Shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1125	Profit or loss in the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1126	1101 - Disclosure - Investments in Associates - Summary of Non-controlling Interests in Subsidiaries (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfNoncontrollingInterestsInSubsidiaries
1127	Disclosure of Non-controlling Interests [Table]	Table	*	*	czz:DisclosureOfNoncontrollingInterestsTable
1128	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1129	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1130	Subsidiaries [member]	Member			ifrs-full:SubsidiariesMember
1131	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1132	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1133	Cosan S.A. [member]	Member			czz:CosanSAMember
1134	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
1135	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1136	Rumo Logistica Operadora Multimodal S.A. [member]	Member			czz:RumoLogisticaOperadoraMultimodalSAMember
1137	Rumo S.A. [member]	Member			czz:RumoSAMember
1138	Logispot Armazens Agricolas S.A. [member]	Member			czz:LogispotArmazensAgricolasSAMember
1139	Radar Propriedades Agricolas S.A. [member]	Member			czz:RadarPropriedadesAgricolasSAMember
1140	Radar II Propriedades Agricolas S.A. [member]	Member			czz:RadarIIPropriedadesAgricolasSAMember
1141	Other investments [member]	Member			us-gaap:OtherInvestmentsMember
1142	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
1143	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1144	Elimination of participation Radar II in Radar [member]	Member			czz:ParticipationEliminationMember
1145	Disclosure of noncontrolling interests [line items]	LineItems			czz:DisclosureOfNoncontrollingInterestsLineItems
1146	Shares issued by the associate	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1147	Shares held by non-controlling shareholders	Concept (Shares)	As Of		czz:SharesHeldByNoncontrollingShareholders
1148	Non-controlling interest	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1149	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
1150	Interest in earnings (losses) of associates	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners
1151	Sales or purchase of interests	Concept (Monetary)	For Period	Credit	czz:SalesOrPurchaseOfInterestsInNoncontrollingInterests
1152	Other comprehensive income (losses)	Concept (Monetary)	For Period		czz:OtherComprehensiveIncomeLoss
1153	Dividends	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToNoncontrollingInterests
1154	Capital increase	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAppropriationOfRetainedEarnings
1155	Incorporation	Concept (Monetary)	For Period	Credit	czz:NoncontrollingInterestIncorporation
1156	Other	Concept (Monetary)	As Of	Debit	czz:OtherTransactions
1157	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
1158	1102 - Disclosure - Investments in Associates - Summary of Balance Sheet (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfBalanceSheet
1159	Statement of financial statements [Table]	Table	*	*	czz:StatementOfFinancialStatementsTable
1160	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1161	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1162	Cosan S.A. [member]	Member			czz:CosanSAMember
1163	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
1164	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1165	Rumo S.A. [member]	Member			czz:RumoSAMember
1166	Statement of financial statements [line items]	LineItems			czz:StatementOfFinancialStatementsLineItems
1167	Current	Abstract			ifrs-full:NetCurrentAssetsLiabilitiesAbstract
1168	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1169	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1170	Net current assets (liabilities)	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssetsLiabilities
1171	Non-current	Abstract			czz:NetNonCurrentAssetsLiabilitiesAbstract
1172	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
1173	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
1174	Net non-current assets	Concept (Monetary)	As Of	Debit	czz:NoncurrentAssetsLiabilities
1175	Total shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1176	1103 - Disclosure - Investments in Associates - Summary of Profit or Loss and Other Comprehensive Income (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfProfitOrLossAndOtherComprehensiveIncome
1177	Statement of financial statements [Table]	Table	*	*	czz:StatementOfFinancialStatementsTable
1178	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1179	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1180	Cosan S.A. [member]	Member			czz:CosanSAMember
1181	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
1182	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1183	Rumo S.A. [member]	Member			czz:RumoSAMember
1184	Statement of financial statements [line items]	LineItems			czz:StatementOfFinancialStatementsLineItems
1185	Net sales	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1186	Profit (loss) before taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTaxDiscontinuedOperations
1187	Income tax (expenses) benefit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1188	Profit (loss) from discontinued operation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
1189	Profit (loss) for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1190	Other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1191	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
1192	Comprehensive income attributable to non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
1193	Dividends paid	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
1194	1104 - Disclosure - Investments in Associates - Summary of Cash Flows (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInAssociatesSummaryOfCashFlows
1195	Statement of financial statements [Table]	Table	*	*	czz:StatementOfFinancialStatementsTable
1196	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1197	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1198	Cosan S.A. [member]	Member			czz:CosanSAMember
1199	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
1200	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1201	Rumo S.A. [member]	Member			czz:RumoSAMember
1202	Statement of financial statements [line items]	LineItems			czz:StatementOfFinancialStatementsLineItems
1203	Cash generated from operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
1204	Income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
1205	Net cash generated by (used in) operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
1206	Net cash (used in) generated by investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
1207	Net cash provided by (used in) financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
1208	Increase (decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
1209	Cash and cash equivalents at beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1210	Cash and cash equivalents at end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1211	1105 - Disclosure - Investments in Joint Ventures - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInJointVenturesAdditionalInformation
1212	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1213	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1214	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1215	Raizen Combustiveis S A [member]	Member			czz:RaizenCombustiveisSAMember
1216	Raizen Energia S A [member]	Member			czz:RaizenEnergiaSAMember
1217	Range [axis]	Axis			ifrs-full:RangeAxis
1218	Ranges [member]	Member			ifrs-full:RangesMember
1219	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1220	Disclosure of joint ventures [line items]	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1221	Number of joint ventures	Concept (Integer)	For Period		czz:NumberOfJointVentures
1222	Ownership interest percentage in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1223	Number of fuel service station	Concept (Integer)	For Period		czz:NumberOfFuelServiceStation
1224	Number of distribution terminals	Concept (Integer)	For Period		czz:NumberOfDistributionTerminals
1225	Number of airport terminals	Concept (Integer)	For Period		czz:NumberOfAirportsTerminals
1226	Volume of ethanol	Concept (Decimal)	For Period		czz:VolumeOfEthanol
1227	Sugar volume	Concept (Decimal)	For Period		czz:VolumeOfSugar
1228	Capacity of electricity	Concept (Decimal)	For Period		czz:EnergyCapacity
1229	Credit facility unused	Concept (Monetary)	As Of	Credit	ifrs-full:UndrawnBorrowingFacilities
1230	1106 - Disclosure - Investments in Joint Ventures - Summary of Changes to Investments in Joint Ventures (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureInvestmentsInJointVenturesSummaryOfChangesToInvestmentsInJointVentures
1231	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1232	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1233	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1234	Raizen Combustiveis S A [member]	Member			czz:RaizenCombustiveisSAMember
1235	Raizen Energia S A [member]	Member			czz:RaizenEnergiaSAMember
1236	Disclosure of joint ventures [line items]	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1237	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1238	Shares issued by the joint venture	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1239	Shares held by Cosan	Concept (Shares)	As Of		czz:NumberOfSharesHeldByParent
1240	Cosan ownership interest	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1241	Interest in earnings of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
1242	Other comprehensive income	Concept (Monetary)	For Period	Credit	czz:ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod
1243	Interest on capital	Concept (Monetary)	For Period	Debit	czz:InterestOnCapital
1244	Dividends	Concept (Monetary)	For Period	Debit	czz:DividendsReceivedFromJointVentures
1245	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1246	1107 - Disclosure - Property, Plant and Equipment - Schedule of Property Plant and Equipment (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipment
1247	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1248	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1249	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1250	Land, buildings and improvements [member]	Member			ifrs-full:LandAndBuildingsMember
1251	Machinery, equipment and facilities [member]	Member			czz:MachineryEquipmentAndFacilitiesMember
1252	Railcars and locomotives [member]	Member			czz:RailcarsAndLocomotivesMember
1253	Permanent railways [member]	Member			czz:PermanentRailwaysMember
1254	Construction in progress [member]	Member			ifrs-full:ConstructionInProgressMember
1255	Other [member]	Member			ifrs-full:OtherPropertyPlantAndEquipmentMember
1256	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1257	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1258	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
1259	Depreciation and Amortization [member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1260	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1261	Property plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1262	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1263	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1264	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
1265	Transfers	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
1266	Business combinations	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1267	Discontinued operation	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
1268	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1269	1108 - Disclosure - Property, Plant and Equipment - Schedule of Property Plant and Equipment (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentParenthetical
1270	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1271	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1272	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1273	Wagons and locomotives [member]	Member			czz:WagonsAndLocomotivesMember
1274	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1275	Bank loan guarantee	Concept (Monetary)	As Of	Credit	czz:BankLoanGuarantee
1276	1109 - Disclosure - Intangible Assets and Goodwill - Summary of Intangible Assets and Goodwill (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfIntangibleAssetsAndGoodwill
1277	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1278	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1279	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1280	Goodwill [member]	Member			ifrs-full:GoodwillMember
1281	Concession rights [member]	Member			ifrs-full:ServiceConcessionRightsMember
1282	Operating license [member]	Member			czz:OperatingLicenseMember
1283	Trademarks [member]	Member			ifrs-full:BrandNamesMember
1284	Customer-related intangible assets [member]	Member			ifrs-full:CustomerrelatedIntangibleAssetsMember
1285	Other [member]	Member			ifrs-full:OtherIntangibleAssetsMember
1286	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1287	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1288	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
1289	Depreciation and Amortization [member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1290	Disclosure of reconciliation of changes in intangible assets and goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1291	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1292	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1293	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1294	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1295	Transfers	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill
1296	Business combination	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1297	Discontinued operation	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsAndGoodwill
1298	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1299	1110 - Disclosure - Intangible Assets and Goodwill - Summary of Intangible Assets and Goodwill (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfIntangibleAssetsAndGoodwillParenthetical
1300	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1301	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1302	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1303	Goodwill [member]	Member			ifrs-full:GoodwillMember
1304	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1305	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1306	Stanbridge Group Limited [member]	Member			czz:StanbridgeGroupLimitedMember
1307	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1308	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1309	Comma Oil Chemicals Limited [member]	Member			czz:CommaOilChemicalsLimitedMember
1310	Disclosure of reconciliation of changes in intangible assets and goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1311	Acquisition percentage	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
1312	Acquisition consideration price	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
1313	Additional goodwill	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1314	Consideration transferred, net of cash received	Concept (Monetary)	For Period	Credit	ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents
1315	1111 - Disclosure - Intangible Assets and Goodwill - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillAdditionalInformation
1316	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1317	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1318	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1319	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1320	Valuation techniques used in fair value measurement [axis]	Axis			ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
1321	Valuation techniques [member]	Member			ifrs-full:ValuationTechniquesMember
1322	Discounted cash flow [member]	Member			ifrs-full:DiscountedCashFlowMember
1323	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1324	Capitalized borrowing costs	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1325	Weighted average interest rate used to capitalize borrowing costs	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1326	Recoverable value	Concept (Monetary)	As Of	Debit	czz:ImpairmentTestsRecoverableValue
1327	Book value of property, plant and equipment and intangible assets	Concept (Monetary)	As Of	Debit	czz:BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets
1328	Description of cash flow estimated period	Concept (Text/String)	For Period		ifrs-full:DescriptionOfReasonForUsingLongerOrShorterReportingPeriod
1329	Weighted average cost of capital percentage	Concept (Percent)	As Of		czz:WeightedAverageCostOfCapitalPercentage
1330	Final value growth rate	Concept (Percent)	For Period		czz:TerminalValueGrowthRate
1331	Percentage of increase in discount rate	Concept (Percent)	For Period		czz:PercentageOfIncreaseInDiscountRate
1332	Impairment of assets and goodwill	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
1333	1112 - Disclosure - Intangible Assets and Goodwill - Summary of Intangible Assets (Excluding Goodwill) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfIntangibleAssetsExcludingGoodwill
1334	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1335	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1336	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1337	Concession rights [member]	Member			ifrs-full:ServiceConcessionRightsMember
1338	Right of way and operating license [member]	Member			czz:ImprovementsToPublicConcessionsAndOperatingLicenseMember
1339	Trademarks [member]	Member			ifrs-full:BrandNamesMember
1340	Customer-related intangible assets [member]	Member			ifrs-full:CustomerrelatedIntangibleAssetsMember
1341	Computer software [member]	Member			ifrs-full:ComputerSoftwareMember
1342	Other [member]	Member			czz:OtherMember
1343	Other [member]	Member			ifrs-full:OtherIntangibleAssetsMember
1344	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
1345	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
1346	Mobil [member]	Member			czz:MobilMember
1347	Comma [member]	Member			czz:CommaMember
1348	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1349	Segments [member]	Member			ifrs-full:SegmentsMember
1350	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1351	A L L Malha Norte [member]	Member			czz:ALLMalhaNorteMember
1352	Lubricants [member]	Member			czz:LubricantsMember
1353	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1354	Annual rate of amortization	Concept (Percent)	For Period		czz:PercentageOfAmortizationRate
1355	Intangible assets other than goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
1356	1113 - Disclosure - Intangible Assets and Goodwill - Summary of Combined Carrying Amounts of Goodwill Allocated to Cash Generating Units (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfCombinedCarryingAmountsOfGoodwillAllocatedToCashGeneratingUnits
1357	Disclosure of information for cash-generating units [table]	Table	*	*	ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable
1358	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1359	Segments [member]	Member			ifrs-full:SegmentsMember
1360	Moove cash generating unit [member]	Member			czz:MooveMember
1361	All other segments [member]	Member			ifrs-full:AllOtherSegmentsMember
1362	Disclosure of information for cash-generating units [line items]	LineItems			ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
1363	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1364	1114 - Disclosure - Loans, Borrowings and Debentures - Summary of Loans, Borrowings and Debentures (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLoansBorrowingsAndDebenturesSummaryOfLoansBorrowingsAndDebentures
1365	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1366	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1367	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1368	BNDES [member]	Member			czz:BNDESMember
1369	EIB [member]	Member			czz:EIBMember
1370	Foreign loans [member]	Member			czz:ForeignLoansMember
1371	NCE [member]	Member			czz:NCEMember
1372	Perpetual notes [member]	Member			czz:PerpetualNotesMember
1373	Resolution 4131 [member]	Member			czz:ResolutionFourOneThreeOneMember
1374	Senior notes due 2018 [member]	Member			czz:SeniorNotesDueTwoThousandAndEighteenMember
1375	Senior notes due 2023 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentyThreeMember
1376	Senior notes due 2027 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentySevenMember
1377	Senior notes due 2024 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentyFourMember
1378	FINEP [member]	Member			czz:FINEPMember
1379	Trade banks [member]	Member			czz:TradeBanksMember
1380	Working capital [member]	Member			czz:WorkingCapitalMember
1381	Bank overdraft [member]	Member			czz:BankOverdraftMember
1382	Prepayment [member]	Member			czz:PrepaymentMember
1383	Non convertible debentures [member]	Member			czz:NonConvertibleDebenturesMember
1384	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1385	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1386	URTJLP [member]	Member			czz:URTJLPIndexMember
1387	Fixed interest rate [member]	Member			ifrs-full:FixedInterestRateMember
1388	TJ462 [member]	Member			czz:TJFourSixTwoMember
1389	Selic [member]	Member			czz:SelicIndexMember
1390	TLJP index [member]	Member			czz:TJLPIndexMember
1391	Selic [member]	Member			czz:SelicIndexOneMember
1392	IPCA [member]	Member			czz:IPCAIndexMember
1393	LIBOR [member]	Member			czz:LIBORMember
1394	CDI [member]	Member			czz:CDIIndexOneMember
1395	CDI [member]	Member			czz:CDIIndexTwoMember
1396	CDI [member]	Member			czz:CDIIndexThreeMember
1397	CDI [member]	Member			czz:CDIIndexFourMember
1398	CDI [member]	Member			czz:CDIIndexFiveMember
1399	Cdi index six [member]	Member			czz:CDIIndexSixMember
1400	Cdi index seven [member]	Member			czz:CDIIndexSevenMember
1401	Cdi index eight [member]	Member			czz:CDIIndexEightMember
1402	CDI [member]	Member			czz:CDIIndexNineMember
1403	CDI [member]	Member			czz:CDIIndexTenMember
1404	CDI [member]	Member			czz:CDIIndexElevenMember
1405	CDI [member]	Member			czz:CDIIndexTwelveMember
1406	Cdi index thirteen [member]	Member			czz:CDIIndexThirteenMember
1407	118% of CDI [member]	Member			czz:CDIIndexFourteenMember
1408	Cdi index fifteen [member]	Member			czz:CDIIndexFifteenMember
1409	IPCA [member]	Member			czz:IPCAIndexOneMember
1410	IPCA [member]	Member			czz:IPCAIndexTwoMember
1411	IPCA index three [member]	Member			czz:IPCAIndexThreeMember
1412	IPCA index four [member]	Member			czz:IPCAIndexFourMember
1413	IPCA index five [member]	Member			czz:IPCAIndexFiveMember
1414	IPCA index six [member]	Member			czz:IPCAIndexSixMember
1415	IPCA index seven [member]	Member			czz:IPCAIndexSevenMember
1416	Cdi index sixteen [member]	Member			czz:CDIIndexSixteenMember
1417	Fixed index four [member]	Member			czz:FixedIndexFourMember
1418	Cdi index seventeen [member]	Member			czz:CDIIndexSeventeenMember
1419	CDI index eighteen [member]	Member			czz:CDIIndexEighteenMember
1420	CDI index [member]	Member			czz:CDIIndexMember
1421	Currency [Axis]	Axis			us-gaap:CurrencyAxis
1422	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1423	Dollar (USD) [member]	Member			currency:USD
1424	Pound (GBP) [member]	Member			currency:GBP
1425	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1426	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1427	29-Jun [member]	Member			czz:JuneTwentyNineMember
1428	25-Feb [member]	Member			czz:FebruaryTwentyFiveMember
1429	20-Oct [member]	Member			czz:OctoberTwentyMember
1430	23-Jun [member]	Member			czz:JuneTwentyThreeMember
1431	20-Sep [member]	Member			czz:SeptemberTwentyMember
1432	24-Jan [member]	Member			czz:JanuaryTwentyFourMember
1433	12-Nov [member]	Member			czz:NovemberTwentyOneMember
1434	17-Jan [member]	Member			czz:JanuarySeventeenMember
1435	June twenty [member]	Member			czz:JuneTwentyMember
1436	May twenty one [member]	Member			czz:MayTwentyOneMember
1437	21-Sep [member]	Member			czz:SeptemberTwentyOneMember
1438	December twenty two [member]	Member			czz:DecemberTwentyTwoMember
1439	July nineteen [member]	Member			czz:JulyNineteenMember
1440	18-Dec [member]	Member			czz:DecemberEighteenMember
1441	17-Nov [member]	Member			czz:NovemberSeventeenMember
1442	December twenty three [member]	Member			czz:DecemberTwentyThreeMember
1443	November nineteen [member]	Member			czz:NovemberNineteenMember
1444	18-Mar [member]	Member			czz:MarchEighteenMember
1445	23-Mar [member]	Member			czz:MarchTwentyThreeMember
1446	27-Jan [member]	Member			czz:JanuaryTwentySevenMember
1447	Feb-24 [member]	Member			czz:FebruaryTwentyFourMember
1448	Sep-24 [member]	Member			czz:SeptemberTwentyFourMember
1449	November Twenty Two [Member]	Member			czz:NovemberTwentyTwoMember
1450	19-Jun [member]	Member			czz:JuneNinteenMember
1451	21-Dec [member]	Member			czz:DecemberTwentyOneMember
1452	Jan-18 [member]	Member			czz:JanuaryEighteenMember
1453	May eighteen [member]	Member			czz:MayEighteenMember
1454	Jul-18 [member]	Member			czz:JulyEighteenMember
1455	Apr-18 [member]	Member			czz:AprilEighteenMember
1456	17-Jun [member]	Member			czz:JuneSeventeenMember
1457	September seventeen [member]	Member			czz:SeptemberSeventeenMember
1458	October seventeen [member]	Member			czz:OctoberSeventeenMember
1459	September eighteen [member]	Member			czz:SeptemberEighteenMember
1460	December twenty [member]	Member			czz:DecemberTwentyMember
1461	December twenty five [member]	Member			czz:DecemberTwentyFiveMember
1462	October twenty four [member]	Member			czz:OctoberTwentyFourMember
1463	September nineteen [member]	Member			czz:SeptemberNineteenMember
1464	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1465	Interest, Index	Concept (Text/String)	For Period		ifrs-full:BorrowingsInterestRateBasis
1466	Index, interest rate adjustment	Concept (Percent)	As Of		ifrs-full:BorrowingsAdjustmentToInterestRateBasis
1467	Annual interest	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1468	Loans, borrowings and debentures	Concept (Monetary)	As Of	Credit	czz:LoansAndBorrowings
1469	Maturity	Concept (Text/String)	For Period		ifrs-full:BorrowingsMaturity
1470	Debentures	Concept (Monetary)	As Of	Credit	czz:Debentures
1471	Total	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1472	Current	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
1473	Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1474	1115 - Disclosure - Loans, borrowings and debentures - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLoansBorrowingsAndDebenturesAdditionalInformation
1475	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1476	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1477	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1478	Cosan Biomassa SA [member]	Member			czz:CosanBiomassaSAMember
1479	Cosan Logistica S.A. [member]	Member			czz:CosanLogisticaSAMember
1480	Cosan Lubes Investments Limited [member]	Member			czz:CosanLubesInvestmentsLimitedMember
1481	Cosan Luxembourg S A [member]	Member			czz:CosanLuxembourgSAMember
1482	Rumo Malha Norte SA [member]	Member			czz:RumoMalhaNorteSAMember
1483	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
1484	Rumo S.A. [member]	Member			czz:RumoSAMember
1485	Unconsolidated subsidiaries [axis]	Axis			ifrs-full:UnconsolidatedSubsidiariesAxis
1486	Entity's total for unconsolidated subsidiaries [member]	Member			ifrs-full:EntitysTotalForUnconsolidatedSubsidiariesMember
1487	A L L Malha Norte [member]	Member			czz:ALLMalhaNorteMember
1488	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1489	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1490	BNDES [member]	Member			czz:BNDESMember
1491	FINEP [member]	Member			czz:FINEPMember
1492	Senior notes due 2018 [member]	Member			czz:SeniorNotesDueTwoThousandAndEighteenMember
1493	EIB [member]	Member			czz:EIBMember
1494	Working capital bank loans [member]	Member			czz:WorkingCapitalBankLoansMember
1495	Prepayments agreement [member]	Member			czz:PrepaymentsAgreementMember
1496	Foreign loans [member]	Member			czz:ForeignLoansMember
1497	FRN [member]	Member			czz:FRNMember
1498	NCE [member]	Member			czz:NCEMember
1499	Perpetual notes [member]	Member			czz:PerpetualNotesMember
1500	Resolution 4131 [member]	Member			czz:ResolutionFourOneThreeOneMember
1501	Senior notes due 2023 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentyThreeMember
1502	Senior notes due 2027 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentySevenMember
1503	Non convertible debentures [member]	Member			czz:NonConvertibleDebenturesMember
1504	Debentures third issue first series [member]	Member			czz:DebenturesThirdIssueFirstSeriesMember
1505	Debentures third issue third series [member]	Member			czz:DebenturesThirdIssueThirdSeriesMember
1506	Debentures third issue second series [member]	Member			czz:DebenturesThirdIssueSecondSeriesMember
1507	Debentures fourth issue second series [member]	Member			czz:DebenturesFourthIssueSecondSeriesMember
1508	Debentures fourth issue third series [member]	Member			czz:DebenturesFourthIssueThirdSeriesMember
1509	Debentures fourth issue first series [member]	Member			czz:DebenturesFourthIssueFirstSeriesMember
1510	Debentures fifth issue [member]	Member			czz:DebenturesFifthIssueMember
1511	Three Brazilian financial institutions [member]	Member			czz:ThreeBrazilianFinancialInstitutionsMember
1512	Senior notes due 2024 [member]	Member			czz:SeniorNotesDueTwoThousandAndTwentyFourMember
1513	Debentures third issue [member]	Member			czz:DebenturesThirdIssueMember
1514	Debentures fourth issue [member]	Member			czz:DebenturesFourthIssueMember
1515	Debentures sixth issue [member]	Member			czz:DebenturesSixthIssueMember
1516	Export Credit Note [Member]	Member			czz:ExportCreditNoteMember
1517	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1518	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1519	Bradesco [member]	Member			czz:BradescoMember
1520	Itau [member]	Member			czz:ItauMember
1521	Safra [member]	Member			czz:SafraMember
1522	Santander banks [member]	Member			czz:SantanderBanksMember
1523	Sumitomo banks [member]	Member			czz:SumitomoBanksMember
1524	Caixa Economica Federal [member]	Member			czz:CaixaEconomicaFederalMember
1525	Banco ABC [member]	Member			czz:BancoABCMember
1526	Borrower By Credit Category [Axis]	Axis			czz:BorrowerByCreditCategoryAxis
1527	Borrower By Credit Category [Domain]	Member			czz:BorrowerByCreditCategoryDomain
1528	Citibank [Member]	Member			czz:CitibankMember
1529	Bank of America Merrill Lynch [Member]	Member			czz:BankOfAmericaMerrillLynchMember
1530	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1531	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1532	16-Jul [member]	Member			czz:JulySixteenMember
1533	49 to 60 months [member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1534	61 to 72 months [member]	Member			czz:LaterThanFiveYearsAndNotLaterThanSixYearsMember
1535	73 to 84 months [member]	Member			czz:LaterThanSixYearsAndNotLaterThanSevenYearsMember
1536	85 to 96 months [member]	Member			czz:LaterThanSevenYearsAndNotLaterThanEightYearsMember
1537	Later than eight year and not later than nine [member]	Member			czz:LaterThanEightYearAndNotLaterThanNineMember
1538	Later than nine year and not later than ten [member]	Member			czz:LaterThanNineYearAndNotLaterThanTenMember
1539	Later than ten year and not later than eleven [member]	Member			czz:LaterThanTenYearAndNotLaterThanElevenMember
1540	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1541	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1542	CDI index [member]	Member			czz:CDIIndexMember
1543	TLJP index [member]	Member			czz:TJLPIndexMember
1544	LIBOR [member]	Member			czz:LIBORMember
1545	CDI [member]	Member			czz:CDIMember
1546	Floating interest rate [member]	Member			ifrs-full:FloatingInterestRateMember
1547	Fixed interest rate [member]	Member			ifrs-full:FixedInterestRateMember
1548	Capital requirements [axis]	Axis			ifrs-full:CapitalRequirementsAxis
1549	Capital requirements [member]	Member			ifrs-full:CapitalRequirementsMember
1550	Project V [member]	Member			czz:ProjectFiveMember
1551	Project VI [member]	Member			czz:ProjectSixMember
1552	Project VII [member]	Member			czz:ProjectSevenMember
1553	Currency [Axis]	Axis			us-gaap:CurrencyAxis
1554	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1555	Dollar (USD) [member]	Member			currency:USD
1556	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1557	Bank guarantee rate	Concept (Percent)	For Period		czz:GuaranteeFeeRate
1558	Balance of bank guarantees contracted	Concept (Monetary)	For Period	Debit	czz:BalanceOfBankGuaranteesContracted
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1560	Interest rate guaranteed by bank	Concept (Percent)	For Period		czz:InterestRateGuaranteedByBankForProjectFinancing
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1562	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
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1564	Adjustment to interest rate basis	Concept (Percent)	As Of		ifrs-full:BorrowingsAdjustmentToInterestRateBasis
1565	Prepayment agreement amount	Concept (Monetary)	As Of	Credit	czz:PrepaymentAgreementAmount
1566	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
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1572	Financial covenants description	Concept (Text/String)	For Period		czz:BorrowingsDescriptionOfFinancialCovenants
1573	1116 - Disclosure - Loans, Borrowings and Debentures - Summary of Non-current Borrowings (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLoansBorrowingsAndDebenturesSummaryOfNoncurrentBorrowings
1574	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1575	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1576	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1577	1 - 2 years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1578	25 to 36 months [member]	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1579	37 to 48 months [member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1580	49 to 60 months [member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1581	61 to 72 months [member]	Member			czz:LaterThanFiveYearsAndNotLaterThanSixYearsMember
1582	73 to 84 months [member]	Member			czz:LaterThanSixYearsAndNotLaterThanSevenYearsMember
1583	85 to 96 months [member]	Member			czz:LaterThanSevenYearsAndNotLaterThanEightYearsMember
1584	Thereafter [member]	Member			czz:LaterThanEightYearsMember
1585	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1586	Non-current borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1587	1117 - Disclosure - Loans, Borrowings and Debentures - Summary of Carrying Amounts of Loans, Borrowings and Debentures (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLoansBorrowingsAndDebenturesSummaryOfCarryingAmountsOfLoansBorrowingsAndDebentures
1588	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1589	Currency [Axis]	Axis			us-gaap:CurrencyAxis
1590	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1591	Reais (R$) [member]	Member			currency:BRL
1592	Dollar (USD) [member]	Member			currency:USD
1593	Pound (GBP) [member]	Member			currency:GBP
1594	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1595	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1596	1118 - Disclosure - Loans, Borrowings and Debentures - Summary of Changes in Loans, Borrowings and Debentures (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLoansBorrowingsAndDebenturesSummaryOfChangesInLoansBorrowingsAndDebentures
1597	Implied Table	Table	*	*	implied:Table
1598	Disclosure of detailed information about borrowings [abstract]	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
1599	Beginning Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1600	Raised	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseThroughAcquisitionsBorrowings
1601	Payment	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1602	Interest, exchange rate and fair value	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseThroughNetExchangeDifferencesBorrowings
1603	Other	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseThroughOtherActivitiesBorrowings
1604	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1605	1119 - Disclosure - Leases - Summary of Finance Lease Liabilities (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLeasesSummaryOfFinanceLeaseLiabilities
1606	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1607	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1608	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1609	Up to 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
1610	Between one and five years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1611	More than five years [member]	Member			ifrs-full:LaterThanTenYearsMember
1612	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1613	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1614	Rolling stock [member]	Member			czz:RollingStockMember
1615	Terminal [member]	Member			czz:TerminalMember
1616	Other [member]	Member			czz:OtherMember
1617	Disclosure of finance lease and operating lease by lessee [line items]	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1618	Future minimum lease payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayable
1619	Interests	Concept (Monetary)	As Of	Credit	ifrs-full:FutureFinanceChargeOnFinanceLease
1620	Present value of minimum lease payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1621	Current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinanceLeaseLiabilities
1622	Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinanceLeaseLiabilities
1623	1120 - Disclosure - Leases - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLeasesAdditionalInformation
1624	Implied Table	Table	*	*	implied:Table
1625	Disclosure of finance lease and operating lease by lessee [abstract]	Abstract			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
1626	Lease expiration period	Concept (Year/Month)	For Period		czz:LeaseMaturityTerm1
1627	1121 - Disclosure - Leases - Summary of Finance Lease movements (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLeasesSummaryOfFinanceLeaseMovements
1628	Implied Table	Table	*	*	implied:Table
1629	Disclosure of finance lease and operating lease by lessee [abstract]	Abstract			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
1630	At the beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1631	Raised	Concept (Monetary)	For Period	Debit	czz:RaisedOnFinanceLeases
1632	Interest, exchange rate and fair value	Concept (Monetary)	For Period	Debit	czz:InterestExchangeRateAndFairValueOnFinanceLeases
1633	Payment of principal	Concept (Monetary)	For Period	Debit	czz:PaymentOfPrincipalOnFinanceLeases
1634	Payment of interest	Concept (Monetary)	For Period	Debit	czz:InterestOnFinanceLeases
1635	At the end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1636	1122 - Disclosure - Leases - Summary of Future Minimum Lease Payments under Non-Cancellable Leases (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureLeasesSummaryOfFutureMinimumLeasePaymentsUnderNonCancellableLeases
1637	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1638	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1639	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1640	Up to 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
1641	Between one and five years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1642	More than five years [member]	Member			ifrs-full:LaterThanTenYearsMember
1643	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1644	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1645	Locomotives [member]	Member			czz:LocomotivesMember
1646	Railcars [member]	Member			czz:RailcarsMember
1647	Other [member]	Member			czz:OtherMember
1648	Disclosure of finance lease and operating lease by lessee [line items]	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1649	Future minimum lease payments under non-cancellable leases	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1650	1123 - Disclosure - Concessions Payable - Summary of Concessions Payable (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureConcessionsPayableSummaryOfConcessionsPayable
1651	Disclosure Of Concessions Payable And Judicial Deposits [Table]	Table	*	*	czz:DisclosureOfConcessionsPayableAndJudicialDepositsTable
1652	Classes of liabilities [axis]	Axis			ifrs-full:ClassesOfLiabilitiesAxis
1653	Liabilities [member]	Member			ifrs-full:LiabilitiesMember
1654	Concessions Payable [member]	Member			czz:ConcessionsPayableMember
1655	Court Discussion [member]	Member			czz:CourtDiscussionMember
1656	Leases and Concessions Payable [member]	Member			czz:LeasesAndConcessionsPayableMember
1657	Lease Payable.	Member			czz:LeasePayableMember
1658	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1659	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1660	Rumo Malha Sul [member]	Member			czz:RumoMalhaSulMember
1661	Rumo Malha Paulista [member]	Member			czz:RumoMalhaPaulistaMember
1662	Rumo Malha Oeste [member]	Member			czz:RumoMalhaOesteMember
1663	Disclosure of Concessions Payable And Judicial Deposits [line items]	LineItems			czz:DisclosureOfConcessionsPayableAndJudicialDepositsLineItems
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1665	Current	Concept (Monetary)	As Of	Credit	czz:CurrentConcessionsPayables
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1667	Lease	Concept (Monetary)	As Of	Credit	czz:LeasePayable
1668	Leases and concessions	Concept (Monetary)	As Of	Credit	czz:LeasesAndConcessionsPayable
1669	1124 - Disclosure - Concessions Payable - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureConcessionsPayableAdditionalInformation
1670	Implied Table	Table	*	*	implied:Table
1671	Disclosure of Concessions Payable and Judicial Deposits [Abstract]	Abstract			czz:DisclosureOfConcessionsPayableAndJudicialDepositsAbstract
1672	Description of lease agreement	Concept (Text/String)	For Period		ifrs-full:DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease
1673	1125 - Disclosure - Concessions Payable - Summary of judicial deposits (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureConcessionsPayableSummaryOfJudicialDeposits
1674	Disclosure Of Judicial Deposits [Table]	Table	*	*	czz:DisclosureOfJudicialDepositsTable
1675	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1676	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1677	Rumo Paulista [member]	Member			czz:RumoPaulistaMember
1678	Rumo Oeste [member]	Member			czz:RumoOesteMember
1679	Disclosure of judicial deposits [line items]	LineItems			czz:DisclosureOfJudicialDepositsLineItems
1680	Judicial deposits	Concept (Monetary)	As Of	Debit	czz:JudicialDeposits
1681	1126 - Disclosure - Commitments - Summary of Regulatory Assets (Liabilities) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCommitmentsSummaryOfRegulatoryAssetsLiabilities
1682	Disclosure of information about amounts recognised in relation to regulatory deferral account balances [table]	Table	*	*	ifrs-full:DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable
1683	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1684	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1685	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1686	Disclosure of information about amounts recognised in relation to regulatory deferral account balances [line items]	LineItems			ifrs-full:DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems
1687	Cost of gas to be recovered/(transferred)	Concept (Monetary)	For Period	Debit	czz:CostOfGasToBeRecoveredTransferred
1688	Credits of taxes to be recovered/(transferred)	Concept (Monetary)	For Period	Debit	czz:CreditsOfTaxesToBeRecoveredTransferred
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1695	Regulatory assets (liabilities)	Concept (Monetary)	For Period	Debit	ifrs-full:DecreaseThroughDisposalsRegulatoryDeferralAccountCreditBalances
1696	Regulatory assets (liabilities) tax	Concept (Monetary)	For Period	Credit	czz:RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances
1697	Regulatory assets liabilities tax deferral account credit balances net	Concept (Monetary)	For Period	Debit	czz:RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet
1698	Adjustment	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances
1699	Adjustment to present value (AVP) with tax credits	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseThroughChangesInAdjustmentToPresentValueWithTaxCreditsRegulatoryDeferralAccountCreditBalances
1700	Extemporaneous credits	Concept (Monetary)	For Period	Credit	czz:IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances
1701	1127 - Disclosure - Commitments - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCommitmentsAdditionalInformation
1702	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
1703	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1704	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1705	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
1706	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1707	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1708	Comgas [member]	Member			czz:COMGASMember
1709	Disclosure of contingent liabilities [line items]	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1710	Financial commitment estimated present value	Concept (Monetary)	As Of	Debit	czz:FinancialCommitmentEstimatedPresentValue
1711	Lease expenses	Concept (Monetary)	For Period	Debit	ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpense
1712	1128 - Disclosure - Commitments - Summary of Future Minimum Lease Payments Under the Operating Leases (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCommitmentsSummaryOfFutureMinimumLeasePaymentsUnderTheOperatingLeases
1713	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1714	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1715	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1716	Later than one year [member]	Member			ifrs-full:LaterThanOneYearMember
1717	Between one and five years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1718	More than five years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
1719	Disclosure of finance lease and operating lease by lessee [line items]	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1720	Minimum operating lease payment	Concept (Monetary)	For Period	Debit	ifrs-full:MinimumOperatingLeasePayments
1721	1129 - Disclosure - Trade Payables - Summary of Trade Payables (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureTradePayablesSummaryOfTradePayables
1722	Disclosure of trade and other payables [Table]	Table	*	*	czz:DisclosureOfTradeAndOtherPayablesTable
1723	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
1724	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
1725	Natural gas suppliers [member]	Member			czz:NaturalGasSupplierMember
1726	Materials and service suppliers [member]	Member			czz:MaterialsAndServiceSuppliersMember
1727	Fuel and lubricants suppliers [member]	Member			czz:FuelAndLubricantsSuppliersMember
1728	Disclosure of trade and other payables [Line Items]	LineItems			czz:DisclosureOfTradeAndOtherPayablesLineItems
1729	Trade and other payables to trade suppliers	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1730	Judicial deposits	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToRelatedParties
1731	Other	Concept (Monetary)	As Of	Credit	ifrs-full:OtherPayables
1732	Total trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayables
1733	Current	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
1734	Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesToTradeSuppliers
1735	1130 - Disclosure - Trade Payables - Summary of Trade Payables (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureTradePayablesSummaryOfTradePayablesParenthetical
1736	Implied Table	Table	*	*	implied:Table
1737	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
1738	Amount secured by judicial deposit	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToRelatedParties
1739	Guaranteed value through surety	Concept (Monetary)	As Of	Credit	czz:GuaranteedValueThroughSuerty
1740	Market value of gas	Concept (Monetary)	As Of	Credit	czz:MarketValueOfGas
1741	1131 - Disclosure - Other Taxes Payable - Schedule of Other Taxes Payable (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOtherTaxesPayableScheduleOfOtherTaxesPayable
1742	Disclosure of other taxes [table]	Table	*	*	czz:DisclosureOfOtherTaxesTable
1743	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1744	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1745	Tax amnesty and refinancing program [member]	Member			czz:TaxAmnestyAndRefinancingProgramMember
1746	ICMS - State VAT [member]	Member			czz:IcmsStateVatMember
1747	COFINS - Revenue tax [member]	Member			czz:COFINSMember
1748	PIS - Revenue tax [member]	Member			czz:PISMember
1749	INSS - Social security [member]	Member			czz:INSSMember
1750	ISS [member]	Member			czz:ISSMember
1751	IOF [member]	Member			czz:IOFMember
1752	Other tax payable [member]	Member			czz:OtherTaxPayableMember
1753	Disclosure of other taxes [line items]	LineItems			czz:DisclosureOfOtherTaxesLineItems
1754	Other tax payable	Concept (Monetary)	As Of	Credit	czz:OtherTaxPayable
1755	Current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1756	Non-Current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1757	1132 - Disclosure - Other Taxes Payable - Summary of Amounts Due on Non-Current Liabilities and Maturity Schedule (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOtherTaxesPayableSummaryOfAmountsDueOnNonCurrentLiabilitiesAndMaturitySchedule
1758	Disclosure of other taxes [table]	Table	*	*	czz:DisclosureOfOtherTaxesTable
1759	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1760	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1761	13 to 24 months [member]	Member			czz:MaturityPeriodOneMember
1762	25 to 36 months [member]	Member			czz:MaturityPeriodTwoMember
1763	37 to 48 months [member]	Member			czz:MaturityPeriodThreeMember
1764	49 to 60 months [member]	Member			czz:MaturityPeriodFourMember
1765	61 to 72 months [member]	Member			czz:MaturityPeriodFiveMember
1766	73 to 84 months [member]	Member			czz:MaturityPeriodSixMember
1767	85 to 96 months [member]	Member			czz:MaturityPeriodSevenMember
1768	Thereafter [member]	Member			czz:MaturityPeriodEightAndThereafterMember
1769	Disclosure of other taxes [line items]	LineItems			czz:DisclosureOfOtherTaxesLineItems
1770	Other tax payable non current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1771	1133 - Disclosure - Income Tax and Social Contribution - Schedule of Reconciliation of Income and Social Contribution Tax Expenses (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIncomeTaxAndSocialContributionScheduleOfReconciliationOfIncomeAndSocialContributionTaxExpenses
1772	Implied Table	Table	*	*	implied:Table
1773	Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]	Abstract			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract
1774	Profit before taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
1775	Income tax and social contribution at nominal rate	Concept (Monetary)	For Period	Debit	czz:IncomeTaxAndSocialContribution
1776	Adjustments to reconcile nominal and effective tax rate	Abstract			ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
1777	Interest in earnings of investees (non-taxable income)	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfInterestInEarningsOfInvestees
1778	Differences in tax rates on earnings / losses of overseas companies	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfPermanentAndOtherDifferenceTaxRates
1779	Granted income tax incentive	Concept (Monetary)	For Period	Credit	czz:IncomeTaxIncentiveAmount
1780	Share-based payment transactions	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfSharebasedCompensation
1781	Interest on shareholders' equity	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfInterestOnEquity
1782	Non-deductible expenses (donations, gifts, etc.)	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfNondeductibleExpenses
1783	Tax losses not recorded	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfTaxLossesNotRecognized
1784	Compensation action	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfCompensationAction
1785	Goodwill amortization effect	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfImpairmentOfGoodwill
1786	Tax effects of discounts granted - PERT	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfDiscountsGranted
1787	Tax loss carryforwards from previous years recorded	Concept (Monetary)	For Period	Debit	czz:TaxEffectOfLossesCarryforwardsFromPreviousYears
1788	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1789	Income tax (expenses) benefits	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1790	Effective rate	Concept (Percent)	For Period		ifrs-full:AverageEffectiveTaxRate
1791	1134 - Disclosure - Income Tax and Social Contribution - Schedule of Reconciliation of Income and Social Contribution Tax Expenses (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIncomeTaxAndSocialContributionScheduleOfReconciliationOfIncomeAndSocialContributionTaxExpensesParenthetical
1792	Implied Table	Table	*	*	implied:Table
1793	Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]	Abstract			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract
1794	Income tax and social contribution nominal rate	Concept (Percent)	For Period		czz:NominalInterestRate
1795	1135 - Disclosure - Income Tax and Social Contribution - Summary of Deferred Income Tax Assets and Liabilities (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIncomeTaxAndSocialContributionSummaryOfDeferredIncomeTaxAssetsAndLiabilities
1796	Implied Table	Table	*	*	implied:Table
1797	Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]	Abstract			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract
1798	Income tax loss carry forwards	Concept (Monetary)	As Of	Debit	czz:DeferredTaxIncomeTaxLossCarryForwards
1799	Social contribution tax loss carry forwards	Concept (Monetary)	As Of	Debit	czz:DeferredTaxSocialContributionTaxLossCarryForwards
1800	Temporary differences	Abstract			czz:TemporaryDifferencesAbstract
1801	Foreign exchange-Loans and borrowings	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsForeignCurrencyLosses
1802	Legal proceedings provision	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetLegalProceedingsProvision
1803	Tax deductible goodwill	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetTaxDeductibleGoodwill
1804	Impairment provision	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsImpairmentOfAssets
1805	Provisions for employee benefits	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetProvisionsForEmployeeBenefits
1806	Allowance for doubtful accounts	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsAllowanceForDoubtfulAccounts
1807	Regulatory asset (liability)	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsRegulatoryAsset
1808	Impairment of tax credit	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetImpairmentOfTaxCredit
1809	Share-based payment transactions	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsShareBasedPayments
1810	Profit sharing	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsProfitSharing
1811	Interest on preferred shareholders payable in subsidiaries	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsInterestOnEquity
1812	Property, plant and equipment-useful life review	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetPropertyPlantAndEquipmentUsefulLifeReview
1813	Contractual dispute	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetContractualDispute
1814	Other	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsOtherTemporaryDifferences
1815	Total	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsTemporaryDifferencesNet
1816	(-) Deferred taxes assets not recognized	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetsNotRecognised
1817	Business combination-property, plant and equipment	Concept (Monetary)	As Of	Debit	czz:DeferredTaxAssetBusinessCombinationPropertyPlantAndEquipment
1818	Tax deductible goodwill	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesTaxDeductibleGoodwill
1819	Lease	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesLeaseTransactions
1820	Concession contract	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesConcessionContract
1821	Unrealized gains on derivatives instruments	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesUnrealizedGainsOnDerivativesInstruments
1822	Income on formation of joint ventures	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesGainOnFormationOfJointVentures
1823	Business combination-Intangible asset	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesBusinessCombinationIntangibleAssets
1824	Other	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesOtherTemporaryDifferences
1825	Total	Concept (Monetary)	As Of	Credit	czz:DeferredTaxLiabilitiesTemporaryDifferences
1826	Total of deferred taxes recorded	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1827	Deferred income tax-Assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
1828	Deferred income tax-Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
1829	1136 - Disclosure - Income Tax and Social Contribution - Summary of Changes in Deferred Income Taxes, Net (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIncomeTaxAndSocialContributionSummaryOfChangesInDeferredIncomeTaxesNet
1830	Implied Table	Table	*	*	implied:Table
1831	Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]	Abstract			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract
1832	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1833	Recorded through income	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1834	Property, plant and equipment-useful life review	Concept (Monetary)	For Period	Debit	czz:DeferredTaxExpenseIncomePropertyPlantAndEquipmentUsefulLifeReview
1835	Other comprehensive income	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1836	Discontinued operation	Concept (Monetary)	For Period	Debit	czz:DeferredTaxExpenseIncomeRecognisedInProfitOrLossDiscontinuingOperations
1837	Tax loss carryforwards used to settle other tax installments	Concept (Monetary)	For Period	Debit	czz:DeferredTaxExpenseIncomeRecognisedToSettleOtherTaxInstallments
1838	Business combinations	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
1839	Tax loss carryforwards over change of shareholding interest in subsidiary	Concept (Monetary)	For Period	Debit	czz:DeferredTaxExpenseIncomeRecognisedOverChangeOfShareholdingInterestInSubsidiary
1840	Other	Concept (Monetary)	For Period	Debit	czz:DeferredTaxExpenseIncomeRecognisedThroughOthers
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1842	1137 - Disclosure - Income Tax and Social Contribution - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureIncomeTaxAndSocialContributionAdditionalInformation
1843	Implied Table	Table	*	*	implied:Table
1844	Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]	Abstract			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract
1845	Maximum permitted tax loss carry forwards percentage	Concept (Percent)	For Period		czz:MaximumPermittedTaxLossCarryforwardsPercentage
1846	1138 - Disclosure - Provisions for Legal Proceedings - Summary of Provision for Legal Proceedings (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureProvisionsForLegalProceedingsSummaryOfProvisionForLegalProceedings
1847	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
1848	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1849	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
1850	Legal proceedings provision, tax [member]	Member			czz:LegalProceedingsProvisionTaxMember
1851	Legal proceedings provision, civil, regulatory and environmental [member]	Member			czz:LegalProceedingsProvisionCivilRegulatoryAndEnvironmentalMember
1852	Legal proceedings provision, labor [member]	Member			czz:LegalProceedingsProvisionLaborMember
1853	Disclosure of other provisions [line items]	LineItems			ifrs-full:DisclosureOfOtherProvisionsLineItems
1854	Provision for legal proceedings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermLegalProceedingsProvision
1855	Judicial deposits	Concept (Monetary)	As Of	Debit	czz:MandatoryJudicialDepositsForLegalProceedings
1856	1139 - Disclosure - Provisions for Legal Proceedings - Summary Changes in Provision for Legal Proceedings (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureProvisionsForLegalProceedingsSummaryChangesInProvisionForLegalProceedings
1857	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
1858	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
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1860	Legal proceedings provision, tax [member]	Member			czz:LegalProceedingsProvisionTaxMember
1861	Legal proceedings provision, civil, regulatory and environmental [member]	Member			czz:LegalProceedingsProvisionCivilRegulatoryAndEnvironmentalMember
1862	Legal proceedings provision, labor [member]	Member			czz:LegalProceedingsProvisionLaborMember
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1865	Accruals	Concept (Monetary)	For Period	Credit	ifrs-full:AdditionalProvisionsOtherProvisions
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1869	1140 - Disclosure - Provisions for Legal Proceedings - Summary of Judicial Claims Deemed to be Probable Losses, Fully Accrued (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureProvisionsForLegalProceedingsSummaryOfJudicialClaimsDeemedToBeProbableLossesFullyAccrued
1870	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
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1877	State VAT - ICMS credits [member]	Member			czz:StateVatIcmsCreditsMember
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1881	Federal income taxes [member]	Member			czz:FederalIncomeTaxesMember
1882	Other [member]	Member			czz:OtherClaimsMember
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1885	1141 - Disclosure - Provisions for Legal Proceedings - Summary of Judicial Claims Deemed as Possible Losses, and Therefore Not Accrued (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureProvisionsForLegalProceedingsSummaryOfJudicialClaimsDeemedAsPossibleLossesAndThereforeNotAccrued
1886	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
1887	Classes of contingent liabilities [axis]	Axis			ifrs-full:ClassesOfContingentLiabilitiesAxis
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1890	Litigation Case 1 [Axis]	Axis			czz:LitigationCase1Axis
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1893	Federal income taxes [member]	Member			czz:FederalIncomeTaxesMember
1894	Foreign financial operation [member]	Member			czz:ForeignFinancialOperationMember
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1899	Goodwill Rumo [member]	Member			czz:GoodwillRumoMember
1900	Penalties related to tax positions [member]	Member			czz:PenaltiesRelatedToTaxPositionsMember
1901	Compensation with IPI - IN 67/98 [member]	Member			czz:CompensationWithIpiIn6798Member
1902	MP 470 - Tax installments [member]	Member			czz:Mp470TaxInstallmentsMember
1903	Rumo Intermodal [member]	Member			czz:RumoIntermodalMember
1904	Stock option [member]	Member			czz:StockOptionClaimsMember
1905	Financial transactions tax on loan [member]	Member			czz:FinancialTransactionsTaxOnLoanMember
1906	Social security contributions [member]	Member			czz:SocialSecurityContributionsMember
1907	Compensation credit award [member]	Member			czz:CompensationCreditAwardMember
1908	Other [member]	Member			czz:OtherClaimsMember
1909	Disclosure of contingent liabilities [line items]	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
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1911	1142 - Disclosure - Provisions for Legal Proceedings - Summary of Unfavorable Outcome in Legal Proceedings (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureProvisionsForLegalProceedingsSummaryOfUnfavorableOutcomeInLegalProceedings
1912	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
1913	Classes of contingent liabilities [axis]	Axis			ifrs-full:ClassesOfContingentLiabilitiesAxis
1914	Contingent liabilities [member]	Member			ifrs-full:ContingentLiabilitiesMember
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1916	Litigation Case 1 [Axis]	Axis			czz:LitigationCase1Axis
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1919	Labor [member]	Member			czz:LaborMember
1920	Regulatory [member]	Member			czz:RegulatoryMember
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1922	Disclosure of contingent liabilities [line items]	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
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1924	1143 - Disclosure - Preferred Shareholders Payable in Subsidiaries - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePreferredShareholdersPayableInSubsidiariesAdditionalInformation
1925	Implied Table	Table	*	*	implied:Table
1926	Disclosure of financial resources [abstract]	Abstract			czz:DisclosureOfFinancialResourcesAbstract
1927	Net of financial resources represented by debentures and working capital	Concept (Monetary)	As Of	Credit	czz:NetOfFinancialResourcesRepresentedByDebenturesAndWorkingCapital
1928	Non-voting preferred shares paid in amount	Concept (Monetary)	As Of	Credit	czz:NonVotingPreferredSharesPaidInAmount
1929	1144 - Disclosure - Shareholders Equity - Summary of Share Capital (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareholdersEquitySummaryOfShareCapital
1930	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1931	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1932	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1933	Class A and BDRs [member]	Member			czz:ClassAndBrazilianDepositoryReceiptsMember
1934	Class B1 shares [member]	Member			czz:ClassBOneSharesMember
1935	Class A and / BDRs [member]	Member			czz:ClassASharesMember
1936	Class B shares [member]	Member			czz:ClassBSharesMember
1937	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
1938	Entity [Domain]	Member			dei:EntityDomain
1939	Controlling Group [member]	Member			czz:ControlingGroupMember
1940	Renaissance Technologies LLC [member]	Member			czz:RenaissanceTechnologiesLlcMember
1941	M&G Investment Management Limited [member]	Member			czz:MAndGInvestmentManagementLimitedMember
1942	Eastspring Investments (Singapore) Limited [member]	Member			czz:EastspringInvestmentsSingaporeLimitedMember
1943	Free Float [member]	Member			czz:FreeFloatMember
1944	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1945	Percentage of shares outstanding	Concept (Percent)	For Period		czz:PercentageOfSharesOutstanding
1946	Percentage of treasury shares	Concept (Percent)	As Of		czz:PercentageOfTreasuryShares
1947	Percentage of shares issued	Concept (Percent)	As Of		czz:PercentageOfSharesIssued
1948	Total shares outstanding	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1949	Treasury shares	Concept (Shares)	As Of		czz:TreasurySharesShares
1950	Total	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1951	1145 - Disclosure - Shareholders Equity - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareholdersEquityAdditionalInformation
1952	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1953	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1954	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1955	Class A and BDRs [member]	Member			czz:ClassAndBrazilianDepositoryReceiptsMember
1956	Class B shares [member]	Member			czz:ClassBSharesMember
1957	Class B1 shares [member]	Member			czz:ClassBOneSharesMember
1958	Class A and / BDRs [member]	Member			czz:ClassASharesMember
1959	Class A treasury shares [member]	Member			czz:ClassATreasurySharesMember
1960	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1961	Amount of shares authorized	Concept (Monetary)	As Of	Credit	czz:AmountOfSharesAuthorised
1962	Shares authorized	Concept (Shares)	As Of		ifrs-full:NumberOfSharesAuthorised
1963	Shares par value	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1964	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1965	Shares of common stock without par value	Concept (Shares)	As Of		czz:SharesOfCommonStockWithoutParValue
1966	Number of votes per share	Concept (Integer)	For Period		czz:NumberOfVotesPerShare
1967	Treasury shares	Concept (Shares)	As Of		czz:TreasurySharesShares
1968	Market value per share	Concept (Share)	As Of		czz:MarketValuePricePerShare
1969	Share price	Concept (Monetary)	For Period		czz:SharePrice1
1970	Payments to redeem entity's shares	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
1971	1146 - Disclosure - Shareholders' Equity - Summary of Other Comprehensive (Loss) Income (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareholdersEquitySummaryOfOtherComprehensiveLossIncome
1972	Disclosure of analysis of other comprehensive income by item [table]	Table	*	*	ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable
1973	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1974	Equity [member]	Member			ifrs-full:EquityMember
1975	Accumulated foreign currency translation effects [member]	Member			czz:AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember
1976	Accumulated (loss) gain on cash flow hedge in joint ventures and subsidiaries [member]	Member			czz:AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndSubsidiariesMember
1977	Accumulated revaluation of investment properties reclassified from property, plant and equipment [Member]	Member			czz:AccumulatedOtherComprehensiveLossRevaluationOfInvestmentPropertiesReclassifiedFromPropertyPlantAndEquipmentMember
1978	Accumulated actuarial loss on defined benefit plan [member]	Member			czz:AccumulatedOtherComprehensiveLossActuarialGainLossMember
1979	Accumulated other comprehensive loss gain on share subscription of subsidiary [member]	Member			czz:AccumulatedOtherComprehensiveLossGainOnShareSubscriptionOfSubsidiaryMember
1980	Accumulated changes in fair value of available for sale securities [member]	Member			czz:AccumulatedOtherComprehensiveLossChangesInFairValueOfAvailableForSaleSecuritiesMember
1981	Accumulated other comprehensive income including noncontrolling interests [member]	Member			czz:AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember
1982	Accumulated other comprehensive income [member]	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
1983	AOCI attributable to noncontrolling interest [member]	Member			czz:AociAttributableToNoncontrollingInterest1Member
1984	Disclosure of analysis of other comprehensive income by item [line items]	LineItems			ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems
1985	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1986	Comprehensive (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1987	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1988	1147 - Disclosure - Earnings per Share - Summary of Calculation of Earnings per Share (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureEarningsPerShareSummaryOfCalculationOfEarningsPerShare
1989	Implied Table	Table	*	*	implied:Table
1990	Earnings per share [abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
1991	Profit attributable from continued operation to ordinary equity holders for basic earnings	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntity
1992	Profit attributable from discontinued operation to ordinary equity holders for basic earnings	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperationsAttributableToOrdinaryEquityHoldersOfParentEntity
1993	Dilutive effect of subsidiary's stock option plan	Concept (Monetary)	For Period	Credit	czz:DilutiveEffectOfShareOptionsAndSharePlansOnNumberOfOrdinaryShares
1994	Dilutive effect of subsidiary's stock option plan-Discontinued operation	Concept (Monetary)	For Period	Credit	czz:DilutiveEffectOfShareOptionsAndSharePlansOnNumberOfOrdinarySharesFromDiscontinuingOperations
1995	Dilutive effect of put option	Concept (Monetary)	For Period	Credit	czz:DilutiveEffectOfPutOption
1996	Profit from continued operation attributable to ordinary equity holders adjusted for the effect of dilution	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
1997	Profit from discontinued operation attributable ordinary equity holders adjusted for the effect dilution	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperationsAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
1998	Basic number of shares outstanding-In thousands shares	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
1999	Dilutive effect of stock option plan	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
2000	Diluted number of shares outstanding-In thousan of shares	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
2001	Continuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
2002	Discontinuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
2003	Basic earnings loss per share	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
2004	Continuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromContinuingOperations
2005	Discontinuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromDiscontinuedOperations
2006	Diluted earnings loss per share	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
2007	1148 - Disclosure - Earnings per Share - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureEarningsPerShareAdditionalInformation
2008	Earnings per share [table]	Table	*	*	ifrs-full:EarningsPerShareTable
2009	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2010	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2011	Rumo S.A. [member]	Member			czz:RumoSAMember
2012	Brado Logistica S A [member]	Member			czz:BradoLogisticaSAMember
2013	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2014	Entity [Domain]	Member			dei:EntityDomain
2015	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
2016	Earnings per share [line items]	LineItems			ifrs-full:EarningsPerShareLineItems
2017	Shares excluded from diluted weighted-average number of ordinary shares	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
2018	Shares related to share repurchase plan excluded	Concept (Shares)	For Period		czz:DilutiveEffectOfSharesRelatedToShareRepurchasePlan
2019	1149 - Disclosure - Net Sales - Summary of Net Sales (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureNetSalesSummaryOfNetSales
2020	Implied Table	Table	*	*	implied:Table
2021	Disclosure of net sales [abstract]	Abstract			czz:DisclosureOfNetSalesAbstract
2022	Gross revenue from sales of products and services	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueArisingFromExchangesOfGoodsOrServicesSaleOfGoods
2023	Construction revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromConstructionContracts
2024	Indirect taxes and deductions	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
2025	Net sales	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
2026	1150 - Disclosure - Net Sales - Summary of Net Sales (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureNetSalesSummaryOfNetSalesParenthetical
2027	Implied Table	Table	*	*	implied:Table
2028	Disclosure of net sales [abstract]	Abstract			czz:DisclosureOfNetSalesAbstract
2029	State tax rate on gas sales	Concept (Percent)	For Period		czz:ApplicableStateTaxRate
2030	1151 - Disclosure - Costs and Expenses by Nature - Summary of Expenses by Nature/Purpose (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureCostsAndExpensesByNatureSummaryOfExpensesByNaturePurpose
2031	Implied Table	Table	*	*	implied:Table
2032	Disclosure Of Expense By Nature [Abstract]	Abstract			czz:DisclosureOfExpenseByNatureAbstract
2033	Raw materials and consumables used	Concept (Monetary)	For Period	Debit	ifrs-full:RawMaterialsAndConsumablesUsed
2034	Employee benefit expense	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
2035	Transportation expenses	Concept (Monetary)	For Period	Debit	ifrs-full:TransportationExpense
2036	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
2037	Construction cost-IFRIC 12	Concept (Monetary)	For Period	Debit	czz:ConstructionCost
2038	Selling expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SalesAndMarketingExpense
2039	Leases and concessions expenses	Concept (Monetary)	For Period	Debit	czz:LeasesAndConcessionsExpenses
2040	Leases expenses	Concept (Monetary)	For Period	Debit	czz:LeasesExpenses
2041	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByNature
2042	Total expenses by nature	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseByNature
2043	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
2044	Selling	Concept (Monetary)	For Period	Debit	czz:SellingExpense1
2045	General and administrative	Concept (Monetary)	For Period	Debit	czz:GeneralAndAdministrativeExpense2
2046	Total cost and expenses	Concept (Monetary)	For Period	Debit	czz:OperatingExpensesIncludingCostOfSales
2047	1152 - Disclosure - Other (Expense) Income, Net - Summary of Details of Other Expense Income Net (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureOtherExpenseIncomeNetSummaryOfDetailsOfOtherExpenseIncomeNet
2048	Implied Table	Table	*	*	implied:Table
2049	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2050	Sales of credit rights (Note 10)	Concept (Monetary)	For Period	Credit	czz:CreditSalesToThirdParties
2051	Income from sale of scrap / eventual income	Concept (Monetary)	For Period	Credit	czz:IncomeFromSaleOfScrap
2052	Insurance reimbursement income	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromReimbursementsUnderInsurancePolicies
2053	(Loss) gain from port operations	Concept (Monetary)	For Period	Credit	czz:GainLossFromPortOperations
2054	Rental income	Concept (Monetary)	For Period	Credit	ifrs-full:RentalIncome
2055	Loss on disposal of non-current assets and intangibles	Concept (Monetary)	For Period	Credit	czz:GainsLossesOnDisposalsOfNoncurrentAssetsAndIntangibles
2056	Settlement of pre-existingrelationship with business combinations	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
2057	Cost related to internal organization and prospective acquisitions	Concept (Monetary)	For Period		ifrs-full:AmountsRecognisedForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
2058	Gains on compensation claims	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeArisingFromInsuranceContracts
2059	Net effect of legal proceedings, recoverable and tax installments	Concept (Monetary)	As Of	Credit	czz:LegalProceedingsRecoverableAndTaxInstallments
2060	Other	Concept (Monetary)	For Period	Debit	czz:OtherExpenseIncome
2061	Other (expense) income, net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherOperatingIncomeExpense
2062	1153 - Disclosure - Finance Results - Summary of Finance Results (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinanceResultsSummaryOfFinanceResults
2063	Implied Table	Table	*	*	implied:Table
2064	Financial results [abstract]	Abstract			czz:FinancialResultsAbstract
2065	Interest on debt	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnDebtInstrumentsIssued
2066	Monetary and exchange rate variation	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
2067	Derivatives and fair value measurement	Concept (Monetary)	For Period	Credit	czz:InterestIncomeOnDerivativesAtFairValueThroughProfitOrLoss
2068	Amortization of borrowing costs	Concept (Monetary)	For Period	Debit	czz:AmortizationOfBorrowingCost
2069	Discounts obtained from financial operations	Concept (Monetary)	For Period	Credit	czz:DiscountsObtainedFromFinancialOperations
2070	Guarantees and warranties on debt	Concept (Monetary)	For Period	Debit	czz:GuaranteesAndWarrantiesOnDebt
2071	Cost of gross debt	Concept (Monetary)	For Period	Debit	czz:CostOfDebtGross
2072	Income from financial investment and exchange rate in cash and cash equivalents	Concept (Monetary)	For Period	Credit	czz:IncomeFromFinancialInvestmentAndExchangeRateInCashAndCashEquivalents
2073	Income from investment less gross debt	Concept (Monetary)	For Period	Credit	czz:IncomeFromInvestmentLessGrossDebt
2074	Cost of debt, net	Concept (Monetary)	For Period	Debit	czz:CostOfDebtNet
2075	Interest on other receivables	Concept (Monetary)	For Period	Credit	czz:InterestOnOtherReceivables
2076	Monetary variation on leases and concessions agreements	Concept (Monetary)	For Period	Debit	czz:MonetaryVariationOnLeasesAndConcessionsAgreements
2077	Monetary variation on leases	Concept (Monetary)	For Period	Debit	czz:MonetaryVariationOnLeases
2078	Bank charges and others	Concept (Monetary)	For Period	Debit	ifrs-full:BankAndSimilarCharges
2079	Advances on real state credits	Concept (Monetary)	For Period	Debit	czz:AdvancesOnRealEstateCredits
2080	Interest on contingencies and contracts	Concept (Monetary)	For Period	Debit	czz:InterestExpenseOnContingenciesAndContracts
2081	Interest on other liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnOtherFinancialLiabilities
2082	Interest on shareholders' equity	Concept (Monetary)	For Period	Debit	czz:InterestExpenseOnShareholdersEquity
2083	Exchange variation	Concept (Monetary)	For Period	Credit	czz:ExchangeVariation
2084	Other charges and monetary variations net	Concept (Monetary)	For Period	Debit	czz:OtherChargesAndMonetaryVariationsNet
2085	Financial results, net	Concept (Monetary)	For Period	Credit	czz:FinancialResults
2086	Finance expense	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
2087	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
2088	Exchange variation	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
2089	Derivatives	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
2090	Financial results, net	Concept (Monetary)	For Period	Credit	czz:FinancialResults
2091	1154 - Disclosure - Financial Instruments - Summary of Financial Assets (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialAssets
2092	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
2093	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
2094	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
2095	Fair value through profit or loss [member]	Member			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
2096	Loans and receivables [member]	Member			ifrs-full:LoansAndReceivablesCategoryMember
2097	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
2098	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
2099	Investment funds [member]	Member			ifrs-full:InvestmentFundsMember
2100	Marketable securities [member]	Member			czz:MarketableSecuritiesMember
2101	Derivative financial instruments [member]	Member			czz:DerivativeFinancialInstrumentsMember
2102	Cash and cash equivalents [member]	Member			czz:CashAndCashEquivalentMember
2103	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
2104	Restricted cash [member]	Member			czz:RestrictedCashMember
2105	Receivables from related parties [member]	Member			czz:ReceivablesFromRelatedPartiesMember
2106	Other financial assets [member]	Member			czz:OtherFinancialAssetMember
2107	Dividends receivable [member]	Member			czz:DividendsReceivableMember
2108	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
2109	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
2110	1155 - Disclosure - Financial Instruments - Summary of Financial Liabilities (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialLiabilities
2111	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2112	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
2113	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
2114	Liabilities amortized cost [member]	Member			ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
2115	Fair value through profit or loss [member]	Member			ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
2116	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
2117	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
2118	Loans, borrowings and debentures [member]	Member			czz:LoansBorrowingsAndDebenturesMember
2119	Leases [member]	Member			czz:LeasesMember
2120	Real estate credit certificates [member]	Member			czz:RealStateCreditCertificatesMember
2121	Trade payables [member]	Member			czz:TradePayablesMember
2122	Other financial liabilities [member]	Member			czz:OtherFinancialLiabilityMember
2123	Payables to related parties [member]	Member			czz:PayablesToRelatedPartiesMember
2124	Dividends payable [member]	Member			czz:DividendsPayableMember
2125	REFIS [member]	Member			czz:TaxInstallmentsREFISMember
2126	Trade payables corporate operation agreements [member]	Member			czz:TradePayablesCorporateOperationAgreementsMember
2127	Preferred shareholders payable in subsidiaries [member]	Member			czz:PreferredShareholdersPayableInSubsidiariesMember
2128	Contingent consideration [member]	Member			czz:ContingentConsiderationMember
2129	Derivative financial instruments [member]	Member			czz:DerivativeFinancialInstrumentsMember
2130	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2131	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2132	1156 - Disclosure - Financial Instruments - Summary of Derivative Financial Instruments (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfDerivativeFinancialInstruments
2133	Disclosure of detailed information about financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
2134	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2135	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
2136	Forward agreements [member]	Member			ifrs-full:ForwardContractMember
2137	Swap agreements (interest rate) [member]	Member			ifrs-full:InterestRateSwapContractMember
2138	Exchange and interest rate swap contract [member]	Member			czz:ExchangeAndInterestRateSwapContractMember
2139	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2140	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2141	Fair value [member]	Member			ifrs-full:AtFairValueMember
2142	Disclosure of detailed information about financial instruments [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2143	Total financial instruments	Concept (Monetary)	As Of	Debit	czz:DerivativeFinancialInstruments
2144	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:DerivativeFinancialAssets
2145	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
2146	Notional	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
2147	Fair value	Concept (Monetary)	As Of	Debit	czz:FairValueOfDerivativeFinancialAssetsLiability
2148	1157 - Disclosure - Financial Instruments - Summary of Credit Risk (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfCreditRisk
2149	Disclosure of credit risk exposure [table]	Table	*	*	ifrs-full:DisclosureOfCreditRiskExposureTable
2150	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
2151	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
2152	Cash and cash equivalents [member]	Member			czz:CashAndCashEquivalentMember
2153	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
2154	Derivative financial instruments [member]	Member			czz:DerivativeFinancialInstrumentsMember
2155	Marketable securities [member]	Member			czz:MarketableSecuritiesMember
2156	Receivables from related parties [member]	Member			czz:ReceivablesFromRelatedPartiesMember
2157	Dividends [member]	Member			czz:DividendsMember
2158	Restricted cash [member]	Member			czz:RestrictedCashMember
2159	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2160	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2161	Credit risk [member]	Member			ifrs-full:CreditRiskMember
2162	Disclosure of credit risk exposure [line items]	LineItems			ifrs-full:DisclosureOfCreditRiskExposureLineItems
2163	Exposure to risk	Concept (Monetary)	As Of		ifrs-full:CreditExposure
2164	1158 - Disclosure - Financial Instruments - Summary of Credit Risk Rating (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfCreditRiskRating
2165	Disclosure of external credit grades [table]	Table	*	*	ifrs-full:DisclosureOfExternalCreditExposuresTable
2166	Credit Rating Source [Axis]	Axis			invest:CreditRatingSourceAxis
2167	Credit Rating Source [Domain]	Member			invest:CreditRatingSourceDomain
2168	AAA credit rating [member]	Member			czz:AAACreditRatingMember
2169	AA credit rating [member]	Member			czz:AACreditRatingMember
2170	A [member]	Member			czz:ACreditRatingMember
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2410	Earnings on assets greater than discount rate	Concept (Monetary)	For Period	Debit	czz:GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset
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2412	1175 - Disclosure - Post-employment Benefits - Summary of Plan Assets (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePostemploymentBenefitsSummaryOfPlanAssets
2413	Disclosure of fair value of plan assets [table]	Table	*	*	ifrs-full:DisclosureOfFairValueOfPlanAssetsTable
2414	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
2415	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
2416	Fixed income bonds [member]	Member			czz:FixedIncomeBondsMember
2417	Variable-income securities [member]	Member			czz:VariableIncomeSecuritiesMember
2418	Other [member]	Member			czz:OtherSecuritiesMember
2419	Disclosure of fair value of plan assets [line items]	LineItems			ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
2420	Plan assets at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
2421	Percentage fair value of plan assets	Concept (Percent)	As Of		czz:PercentageOfFairValueOfPlanAssets
2422	1176 - Disclosure - Post-employment Benefits - Summary of Assumptions to Determine Defined Benefit Obligations (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePostemploymentBenefitsSummaryOfAssumptionsToDetermineDefinedBenefitObligations
2423	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
2424	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
2425	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
2426	Futura [member]	Member			czz:FuturaPensionPlanMember
2427	Comgas [member]	Member			czz:ComgasPensionPlanMember
2428	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2429	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
2430	Inflation rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
2431	Future salary increases	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2432	Increase in pension plans	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreases
2433	1177 - Disclosure - Post-employment Benefits - Summary of Changes in Discount Rate (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePostemploymentBenefitsSummaryOfChangesInDiscountRate
2434	Disclosure of sensitivity analysis for actuarial assumptions [table]	Table	*	*	ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
2435	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
2436	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
2437	Futura [member]	Member			czz:FuturaPensionPlanMember
2438	Futura II [member]	Member			czz:FuturaTwoPensionPlanMember
2439	Comgas [member]	Member			czz:ComgasPensionPlanMember
2440	Disclosure of sensitivity analysis for actuarial assumptions [line items]	LineItems			ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2441	Discount rate, increase	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
2442	Discount rate, decrease	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
2443	1178 - Disclosure - Post-employment Benefits - Summary of Changes in Discount Rate (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosurePostemploymentBenefitsSummaryOfChangesInDiscountRateParenthetical
2444	Implied Table	Table	*	*	implied:Table
2445	Disclosure of sensitivity analysis for actuarial assumptions [abstract]	Abstract			ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract
2446	Percentage increase in discount rate	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
2447	Percentage decrease in discount rate	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
2448	1179 - Disclosure - Share-based Payment - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSharebasedPaymentAdditionalInformation
2449	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2450	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2451	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
2452	Long term retention plan [member]	Member			czz:LongTermRetentionPlanMember
2453	April 27, 2017 [member]	Member			czz:AprilTwentySevenTwoThousandSeventeenMember
2454	July 31, 2017 [member]	Member			czz:JulyThirtyOneTwoThousandSeventeenMember
2455	April 20, 2017 [member]	Member			czz:AprilTwentyTwoThousandSeventeenMember
2456	December 08, 2017 [member]	Member			czz:DecemberEightTwoThousandSeventeenMember
2457	Stock option plan [member]	Member			czz:StockOptionPlanMember
2458	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2459	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2460	Cosan S.A. [member]	Member			czz:CosanSAMember
2461	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
2462	Cosan S.A. Industria e Comercio [member]	Member			czz:CosanSAIndustriaeComercioMember
2463	Income Statement Location [Axis]	Axis			us-gaap:IncomeStatementLocationAxis
2464	Income Statement Location [Domain]	Member			us-gaap:IncomeStatementLocationDomain
2465	General and Administrative Expense [Member]	Member			us-gaap:GeneralAndAdministrativeExpenseMember
2466	Range [axis]	Axis			ifrs-full:RangeAxis
2467	Ranges [member]	Member			ifrs-full:RangesMember
2468	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
2469	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2470	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2471	Stock option plan maximum percentage limit	Concept (Percent)	For Period		czz:MaximumLimitOfStockPercentageIssuedForStockOptionPlan
2472	Exercise price	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
2473	Expected life (years)	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
2474	Weighted average prices at exercise date for stock options exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise
2475	Expense on stock option plan	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
2476	Number of options granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
2477	Percentage of shares in equity compensation	Concept (Percent)	For Period		czz:RetentionPercentage
2478	Eligible period for long-term retention agreement	Concept (Text/String)	For Period		ifrs-full:DescriptionOfMaximumTermOfOptionsGrantedForSharebasedPaymentArrangement
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2481	Expense to be recognized on stock option	Concept (Monetary)	For Period	Debit	czz:ExpenseFromShareBasedPaymentTransactionsWithEmployeesToBeRecognised
2482	Stock option plan maximum percentage limit of distribution	Concept (Percent)	For Period		czz:MaximumLimitOfStockPercentageDistributionOfStockOptionPlan
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2484	Fair value at grant	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
2485	Approved share-based compensation models	Concept (Integer)	For Period		czz:NumberOfApprovedSharebasedCompensationModels
2486	1180 - Disclosure - Share Based Payment - Summary of Vesting Period and Options Outstanding (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareBasedPaymentSummaryOfVestingPeriodAndOptionsOutstanding
2487	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2488	Range [axis]	Axis			ifrs-full:RangeAxis
2489	Ranges [member]	Member			ifrs-full:RangesMember
2490	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
2491	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2492	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2493	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2494	Cosan S.A. Industria e Comercio [member]	Member			czz:CosanSAIndustriaeComercioMember
2495	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
2496	Companhia de Gas de Sao Paulo - COMGAS [member]	Member			czz:CompanhiaDeGasDeSaoPauloMember
2497	Rumo S.A. [member]	Member			czz:RumoSAMember
2498	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2499	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
2500	August 18, 2011 [member]	Member			czz:AugustEighteenTwoThousandElevenOneMember
2501	August 18, 2011 [member]	Member			czz:AugustEighteenTwoThousandElevenTwoMember
2502	December 12, 2012 [member]	Member			czz:DecemberTwelveTwoThousandTwelveMember
2503	April 24, 2013 [member]	Member			czz:AprilTwentyFourTwoThousandThirteenMember
2504	April 25, 2014 [member]	Member			czz:AprilTwentyFiveTwoThousandFourteenMember
2505	August 31, 2015 [member]	Member			czz:AugustThirtyOneTwoThousandFifteenMember
2506	September 29, 2017 [member]	Member			czz:SeptemberTwentyNineTwoThousandSeventeenMember
2507	August 18, 2017 [member]	Member			czz:AugustEighteenTwoThousandSeventeenMember
2508	April 27, 2017 [member]	Member			czz:AprilTwentySevenTwoThousandSeventeenMember
2509	July 31, 2017 [member]	Member			czz:JulyThirtyOneTwoThousandSeventeenMember
2510	April 20, 2017 [member]	Member			czz:AprilTwentyTwoThousandSeventeenMember
2511	December 08, 2017 [member]	Member			czz:DecemberEightTwoThousandSeventeenMember
2512	Two thousand and fifteen plans [member]	Member			czz:TwoThousandAndFifteenPlansMember
2513	2016 Plan [member]	Member			czz:TwoThousandAndSixteenPlansMember
2514	2017 Plan [member]	Member			czz:TwoThousandAndSeventeenPlansMember
2515	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2516	Expected life (years)	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
2517	Interest rate %	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
2518	Expected volatility %	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
2519	Number of instruments, granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
2520	Number of instruments, exercisable options	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
2521	Number of instruments, vested or cancellation option	Concept (Decimal)	For Period		czz:NumberOfShareOptionsVestedOrForfeitedInSharebasedPaymentArrangement
2522	Number of instruments, vested	Concept (Decimal)	For Period		czz:NumberOfShareOptionsVestedInSharebasedPaymentArrangement
2523	Number of instruments, outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
2524	Market price on grant date	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
2525	Exercise price	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
2526	Fair value at grant	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
2527	1181 - Disclosure - Share Based Payment - Summary of Number and Weighted-average Exercise Prices of Share Options Under Share Option Programs (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareBasedPaymentSummaryOfNumberAndWeightedaverageExercisePricesOfShareOptionsUnderShareOptionPrograms
2528	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2529	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2530	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2531	Cosan S.A. Industria e Comercio [member]	Member			czz:CosanSAIndustriaeComercioMember
2532	Cosan S A Industria E Comercio [member]	Member			czz:CosanSAIndustriaComercioMember
2533	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2534	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
2535	Stock option plan [member]	Member			czz:StockOptionPlanMember
2536	Stock grant [member]	Member			czz:OtherGrantsPlanMember
2537	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2538	Weighted-average exercise price, beginning balance	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
2539	Weighted-average exercise price, cancellation or settlements	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
2540	Weighted-average exercise price, share options exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
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2543	Number of options, granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
2544	Number of options, vested	Concept (Decimal)	For Period		czz:NumberOfShareOptionsVestedInSharebasedPaymentArrangement
2545	Number of options, cancellation or settlements	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
2546	Number of options, share options exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
2547	Number of options, ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
2548	1182 - Disclosure - Share Based Payment - Summary of Vesting Period and Options Outstanding (Parenthetical) (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareBasedPaymentSummaryOfVestingPeriodAndOptionsOutstandingParenthetical
2549	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2550	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2551	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2552	Rumo S.A. [member]	Member			czz:RumoSAMember
2553	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2554	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
2555	Two thousand and fifteen plans [member]	Member			czz:TwoThousandAndFifteenPlansMember
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2557	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2558	Number of instruments, granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
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2562	1183 - Disclosure - Share Based Payment - Schedules of Restricted Shares (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureShareBasedPaymentSchedulesOfRestrictedShares
2563	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2564	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2565	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2566	Rumo S.A. [member]	Member			czz:RumoSAMember
2567	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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2569	Restricted shares [member]	Member			czz:RestrictedSharesMember
2570	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
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2575	1184 - Disclosure - Subsequent Events - Additional Information (Detail)	Network	*	*	http://www.cosan.com.br/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation
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2581	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
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2585	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2586	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2587	Rumo S.A. [member]	Member			czz:RumoSAMember
2588	Disclosure of non-adjusting events after reporting period [line items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2589	Expense on stock option plan	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
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