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14. Loans, Debentures, and Finance Leases (Details 3) R$ in Millions	12 Months Ended
	Dec. 31, 2017 BRL (R$)
SummaryOfLoansLineItems [Line Items]
Loan maturity, amount	R$ 320.0
Cost in percentage of CDI	R$ 102.9
Loan
SummaryOfLoansLineItems [Line Items]
Loan maturity, date	18-Jul
Loan maturity, amount	R$ 60.0
Cost in percentage of CDI	R$ 103.0
Loan
SummaryOfLoansLineItems [Line Items]
Loan maturity, date	18-Sep
Loan maturity, amount	R$ 80.0
Cost in percentage of CDI	R$ 101.5
Loan
SummaryOfLoansLineItems [Line Items]
Loan maturity, date	18-Nov
Loan maturity, amount	R$ 80.0
Cost in percentage of CDI	R$ 101.4
Loan
SummaryOfLoansLineItems [Line Items]
Loan maturity, date	22-Jun
Loan maturity, amount	R$ 100.0
Cost in percentage of CDI	R$ 105.0

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- Definition

Cost in percentage of CDI.

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No definition available.

+ Details

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Namespace Prefix:	UGP_
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Balance Type:	credit
Period Type:	duration

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- Definition

long-term consolidated debt had the following principal maturity amount.

+ References

No definition available.

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

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- Definition

long-term consolidated debt had the following principal maturity schedule.

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No definition available.

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- References

No definition available.

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- Details

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- Details

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