The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard
-URIDate 2019-03-27

+ Details

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

- 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

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

- Definition

The number of shares issued by the entity, for which full payment has been received.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 79
-Subparagraph a
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_ii&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_NumberOfSharesIssuedAndFullyPaid
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

long-term consolidated debt had the following principal maturity schedule.

+ References

No definition available.

+ Details

Name:	ugp_DebentureFinalMaturity
Namespace Prefix:	ugp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest schedule.

+ References

No definition available.

+ Details

Name:	ugp_DebentureInterestDescription
Namespace Prefix:	ugp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Debentures

+ References

No definition available.

+ Details

Name:	ugp_Debentures
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of estimated investments regarding port concession.

+ References

No definition available.

+ Details

Name:	ugp_EstimatedInvestments
Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maturity period of estimated investments to be disbursed.

+ References

No definition available.

+ Details

Name:	ugp_EstimatedInvestmentsDisbursementPeriod
Namespace Prefix:	ugp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise of warrants rights outstanding.

+ References

No definition available.

+ Details

Name:	ugp_ExerciseOfWarrantsRightsOutstanding
Namespace Prefix:	ugp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Minimum port storage capacity.

+ References

No definition available.

+ Details

Name:	ugp_Minimumportstoragecapacity
Namespace Prefix:	ugp_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of concession.

+ References

No definition available.

+ Details

Name:	ugp_PeriodOfConcession
Namespace Prefix:	ugp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_MajorOrdinaryShareTransactionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ugp_IssuanceOfDebenturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=ugp_TequimarVilaDoCondeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ugp_DebentureAxis=ugp_DebentureNonconvertibleIntoSharesMaturingOnMarch152028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=ugp_DebenturesFirstIssueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=ugp_DebenturesSecondIssueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ugp_PortConcessionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=ugp_UltracargoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Detail) m³ in Thousands, R$ in Thousands	Apr. 09, 2021 BRL (R$) m³	Mar. 26, 2021 BRL (R$)	Mar. 19, 2021 BRL (R$)	Feb. 24, 2021 shares	Dec. 31, 2020 BRL (R$) shares	Aug. 12, 2020 shares	Feb. 19, 2020 shares
Disclosure of non-adjusting events after reporting period [line items]
Rights outstanding \| shares				70,939		86,978	2,108,542
Debentures					R$ 6,544,116
Major ordinary share transactions [member]
Disclosure of non-adjusting events after reporting period [line items]
Number of shares issued \| shares							1,115,076,651
Rights outstanding \| shares				70,939	2,195,520
Issuance of debentures [member] \| Tequimar Vila do Conde [member] \| Debentures, nonconvertible into shares, maturing on March 15, 2028 [member] \| Debentures first issue [member]
Disclosure of non-adjusting events after reporting period [line items]
Debentures			R$ 360,000
Final maturity			March 15, 2028
Floating interest rates in dollar change in foreign loan			IPCA plus 4.04%
Borrowings, interest rate basis			111.4% of DI
Issuance of debentures [member] \| Tequimar Vila do Conde [member] \| Debentures, nonconvertible into shares, maturing on March 15, 2028 [member] \| Debentures second issue [member]
Disclosure of non-adjusting events after reporting period [line items]
Debentures		R$ 100,000
Final maturity		March 15, 2028
Floating interest rates in dollar change in foreign loan		IPCA plus 4.37%
Borrowings, interest rate basis		111.4% of DI
Port concessions [ember] \| Ultracargo [member]
Disclosure of non-adjusting events after reporting period [line items]
Estimated investments	R$ 310,000
Estimated investments, disbursement period	6 years
Port concessions [ember] \| Ultracargo [member] \| Bottom of range [member]
Disclosure of non-adjusting events after reporting period [line items]
Minimum port storage capacity \| m³	79
Term of concession	20 years