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Trade accounts payable - Long-term Commitments (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Trade accounts payable [Line Items] |  |
LongTermTake Or Pay Contracts | R$ 26,239,939 | R$ 14,606,380

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- Definition Refers to long term take-or-pay agreements, which include purchase obligations for chemicals, transportation, and natural gas under non-cancellable contracts + References No definition available. + Details
Name: | suz_LongTermTakeOrPayContracts
Namespace Prefix: | suz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Trade accounts payable [Line Items] + References No definition available. + Details
Name: | suz_TradeAccountsPayableLineItems
Namespace Prefix: | suz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration