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Equity - Dividends and Allocation of Net Income (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2019 R$ / shares
Shareholders equity details [abstract] |
Legal reserve as percentage of net income | 5.00%
Interim Dividends Paid Per Share | R$ 0.20
Dividends payable per share | R$ 0.24
Statutory reserve as percentage of net income | 50.00%

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- Definition Basic earnings (loss) per share from continuing operations. [Refer: Basic earnings (loss) per share; Continuing operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2019-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2019-en-r&anchor=para_66&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Interim Dividends Paid Per Share. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Legal reserve as percentage of net income + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Shareholders equity details. + References No definition available. + Details
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Namespace Prefix: | ugp_
Data Type: | xbrli:stringItemType
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- Definition Statutory reserve as percentage of net income. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant