Trade accounts receivables - Main customers (Details) - Net Sales	Sep. 30, 2025	Dec. 31, 2024
Pulp
Disclosure of nature and extent of risks arising from financial instruments [line items]
Concentration Risk, Percentage	11.06%	10.00%
Paper
Disclosure of nature and extent of risks arising from financial instruments [line items]
Concentration Risk, Percentage	10.70%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

No definition available.

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