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Investment - Summary of provision for short-term liabilities (Detail) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 BRL (R$)
Disclosure of joint ventures [abstract] |
Balance as of December 31, 2019 | R$ 0
Transfer to provision for short-term liabilities | 2,096
Balance as of December 31, 2020 | R$ 2,096

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- References No definition available. + Details
Name: | ifrs-full_DisclosureOfJointVenturesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of non-current provision for short-term liabilities of joint venture. + References No definition available. + Details
Name: | ugp_NonCurrentProvisionForShortTermLiabilitiesOfJointVenture
Namespace Prefix: | ugp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of transfer to provision for short-term liabilities pertaining to joint ventures. + References No definition available. + Details
Name: | ugp_TransferToProvisionForShortTermLiabilitiesRelatedToJointVentures
Namespace Prefix: | ugp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration