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26. EMPLOYEE BENEFITS (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Benefits Details 2
Present value of defined benefit obligation, beginning	R$ 2,872,442	R$ 2,430,381
Cost of service	1,285	1,244	R$ 1,807
Interest cost	322,359	311,361	293,533
Benefits paid	(284,777)	(264,287)
Actuarial loss/(gain)	166,540	393,743
Present value of defined benefit obligation, ending	R$ 3,077,849	R$ 2,872,442	R$ 2,430,381

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- References

No definition available.

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- Definition

The amount of benefits paid or payable for retirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]

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- Definition

The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]

+ References

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)]

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]

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