The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 141
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_f&doctype=Standard
-URIDate 2021-03-24

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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

+ References

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 147
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_147_c&doctype=Standard
-URIDate 2021-03-24

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- Definition

The percentage of participating employees' accumulated fund to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

The amount of contributions by portion of reversion fund to a defined benefit plan by the employer.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of defined contribution pension plan reversion fund.

+ References

No definition available.

+ Details

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

- Definition

The amount of defined contribution pension plan reversion fund reclassified to assets held for sale.

+ References

No definition available.

+ Details

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Namespace Prefix:	ugp_
Data Type:	xbrli:monetaryItemType
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- Definition

The demographic assumption percentage of reasonably possible decrease in mortality table for other benefits.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of participating employees' accumulated fund to a defined contribution plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- Definition

The number of active participating employees to a defined contribution plan.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The number of former employees receiving benefits to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	ugp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of retired participating employees to a defined contribution plan.

+ References

No definition available.

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Data Type:	xbrli:integerItemType
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Employee Benefits and Private Pension Plan - Additional information (Detail) R$ in Thousands	1 Months Ended	12 Months Ended
	May 31, 2021 BRL (R$)	Dec. 31, 2021 BRL (R$) Employee	Dec. 31, 2020 BRL (R$)	Dec. 31, 2019 BRL (R$)	May 30, 2020 BRL (R$)
Disclosure of defined benefit plans [line items]
Maximum matching contribution percentage		11.00%
Defined contribution pension plan fund	R$ 3,706	R$ 19,831			R$ 47,088
Contribution to Ultraprev		R$ 16,368	R$ 17,186
Number of active participating employees \| Employee		4,381
Number of retired participating employees \| Employee		387
Number of former employees receiving benefits \| Employee		23
Sponsors’ normal contributions	27,451
Defined contribution pension fund reclassified to assets held for sale	R$ 3,512
Contribution to Ultraprev, portion of pension fund		R$ 10,566	R$ 7,446	R$ 21,357
Demographic assumption percentage of reasonably possible decrease in mortality table for other benefits		10.00%
Bottom of range [member]
Disclosure of defined benefit plans [line items]
Monthly accumulated fund percentage		0.30%
Fixed monthly accumulated fund period		5 years
Top of range [member]
Disclosure of defined benefit plans [line items]
Monthly accumulated fund percentage		1.00%
Fixed monthly accumulated fund period		35 years
Average period		92 months