Name:	ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The percentage of the basis (reference rate) used for calculation of the interest rate.

No definition available.

Name:	suz_AdjustmentToInterestRateMultiplier
Namespace Prefix:	suz_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

Rate of interest on investment.

No definition available.

Name:	suz_InvestmentInterestRate
Namespace Prefix:	suz_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

Total current and non-current debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

No definition available.

Name:	suz_MarketableSecurities
Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of investments in debt and equity securities which have original maturities over to 90 days, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

No definition available.

Name:	suz_MarketableSecuritiesCurrentAsset
Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Debt and equity financial instruments including securities held-to-maturity.

No definition available.

Name:	suz_MarketableSecuritiesNoncurrentAssets
Namespace Prefix:	suz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Time Deposit Investment, Maturity Term

No definition available.

Name:	suz_TimeDepositInvestmentMaturityTerm
Namespace Prefix:	suz_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

Name:	ifrs-full_GeographicalAreasAxis=ifrs-full_CountryOfDomicileMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_GeographicalAreasAxis=ifrs-full_ForeignCountriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_PrivateFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_TypesOfInterestRatesAxis=suz_CDIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_PrivateSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_TypesOfInterestRatesAxis=suz_CDIIPCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_PrivateSecuritiesCdbsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_PrivateSecuritiesCdbsEscrowAccountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_TimeDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_OtherMarketableSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=suz_OtherRestrictedFinancialInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: