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Provision for Asset Retirement Obligation - Fuel Tanks - Changes in the provision for asset retirement obligation (Detail) - Asset Retirement Obligation [member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Post Employment Benefits [line items]
Beginning balance	R$ 54,667	R$ 64,774	R$ 77,564
Additions (new tanks)	290	264	537
Expense with tanks removed	(5,456)	(12,752)	(15,432)
Accretion expense	1,741	2,381	2,105
Ending Balance	51,242	R$ 54,667	R$ 64,774
Current	3,847
Non-current	R$ 47,395

X

- Definition

The amount of additional other provisions made. [Refer: Other provisions]

+ References

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- Definition

The amount of non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions]

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- Definition

The amount of provisions other than provisions for employee benefits. [Refer: Provisions]

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- Definition

Accretion expense, other provisions.

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- Definition

Provision expenses.

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