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TRADE ACCOUNTS RECEIVABLE - Main customers (Details) - customer | 6 Months Ended | 12 Months Ended
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Jun. 30, 2021 | Dec. 31, 2020
TRADE ACCOUNTS RECEIVABLE |  |
Number of major customers responsible for more than 10% of net sales | 0 | 0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of customers in concentration of risk analysis representing major percentage of total net sales. + References No definition available. + Details
Name: | suz_ConcentrationRiskRevenueBenchmarkNumberOfMajorCustomers
Namespace Prefix: | suz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration