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v3.21.1

Provisions and Contingencies - Balances of escrow deposits (Detail) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Summary of escrow deposits [line items] |  |
Total - non-current assets | R$ 949,796 | R$ 921,443
Tax matters [member] |  |
Summary of escrow deposits [line items] |  |
Total - non-current assets | 789,624 | 753,810
Labor litigation [member] |  |
Summary of escrow deposits [line items] |  |
Total - non-current assets | 57,603 | 71,605
Civil and other [member] |  |
Summary of escrow deposits [line items] |  |
Total - non-current assets | R$ 102,569 | R$ 96,028

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- Definition The amount of long-term deposits held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LongtermDeposits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Summary of escrow deposits. + References No definition available. + Details
Name: | ugp_SummaryOfEscrowDepositsLineItems
Namespace Prefix: | ugp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ugp_EscrowDepositsAxis=ugp_TaxMattersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ugp_EscrowDepositsAxis=ugp_LaborLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ugp_EscrowDepositsAxis=ugp_CivilAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |