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

X

- 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

X

- 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