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Equity - Dividends and Allocation of Net Income (Parenthetical) (Detail) - R$ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [abstract]
Legal reserve as percentage of net income	5.00%
Statutory reserve as percentage of net income	50.00%
Interim dividends, paid per share	R$ 0.2		R$ 0.2
Proposed dividends, per share	R$ 0.17	R$ 0.44	R$ 0.24

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- References

No definition available.

+ Details

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

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- Definition

The amount, per share, of interim dividends recognised as distributions to owners.

+ References

No definition available.

+ Details

Name:	ugp_InterimDividendsPerShare
Namespace Prefix:	ugp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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- Definition

The percentage of net income allocated to legal reserve.

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No definition available.

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Name:	ugp_LegalReserveAsPercentageOfNetIncome
Namespace Prefix:	ugp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount, per share, of proposed dividends recognised as distributions to owners.

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No definition available.

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Name:	ugp_ProposedDividendsPerShare
Namespace Prefix:	ugp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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- Definition

The percentage of net income allocated to statutory reserve of dividends.

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No definition available.

+ Details

Name:	ugp_StatutoryReserveAsPercentageOfNetIncome
Namespace Prefix:	ugp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant