Loans, financing, debentures and derivative financial instruments - Summary of Changes in Loans, Debentures and Finance Leases (Detail) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loans, financing, debentures and derivative financial instruments
Loans, debentures and finance leases, beginning	R$ 11,768,017	R$ 11,750,361	R$ 16,377,643
New loans and debentures with cash effect	4,179,974	2,903,031	1,519,580
Interest accrued	846,329	761,052	945,023
Principal payment	(2,718,953)	(3,149,525)	(5,848,611)
Interest payment	(798,653)	(742,724)	(914,979)
Monetary and exchange rate variation	1,675,583	(319,488)	(587,064)
Change in fair value	(465,053)	351,560	(68,366)
Hedge result	(185,134)	102,422	327,135
Balance of acquired company		111,328
Loans, debentures and finance leases, ending	R$ 14,302,110	R$ 11,768,017	R$ 11,750,361

The amount of outstanding funds that the entity is obligated to repay.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

The amount of new loans and debentures with cash effect of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_AdditionsLoansAndDebenturesWithCashEffect
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase (decrease) in loans and borrowings resulting from balance of acquired company.

+ References

No definition available.

+ Details

Name:	ugp_IncreaseDecreaseThroughBalanceOfAcquiredCompany
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase (decrease) in loans and borrowings resulting from net hedge differences.

+ References

No definition available.

+ Details

Name:	ugp_IncreaseDecreaseThroughNetHedgeDifferencesLoansAndBorrowings
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of interest accrued during period of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_LoandsAndDebenturesInterestAccrued
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of change in fair value of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_LoansAndDeBenturesChangeInFairValue
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of interest payment of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_LoansAndDebenturesInterestPayment
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of monetary and exchange rate variation of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_LoansAndDebenturesMonetaryAndExchangeRateVariation
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of principal payment of loans and debentures.

+ References

No definition available.

+ Details

Name:	ugp_PrincipalPaymentAndFinancialLeases
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration