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27. EMPLOYEE BENEFITS (Details 17) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of defined benefit plans [line items]
Effect on present value of obligations	R$ (51,213)	R$ (36,627)
Post-employment healthcare benefits | Discount rate
Disclosure of defined benefit plans [line items]
Sensitivity level	0.50%
Effect on current service cost and on interest on actuarial obligations	R$ 909
Effect on present value of obligations	R$ (35,530)
Post-employment healthcare benefits | Medical inflation
Disclosure of defined benefit plans [line items]
Sensitivity level	1.00%
Effect on current service cost and on interest on actuarial obligations	R$ 8,091
Effect on present value of obligations	R$ 84,560
Post-employment healthcare benefits | Mortality table
Disclosure of defined benefit plans [line items]
Sensitivity level	1.00%
Effect on current service cost and on interest on actuarial obligations	R$ (2,161)
Effect on present value of obligations	R$ (22,582)
Post-employment healthcare benefits | Discount rate
Disclosure of defined benefit plans [line items]
Sensitivity level	(0.50%)
Effect on current service cost and on interest on actuarial obligations	R$ (992)
Effect on present value of obligations	R$ 38,727
Post-employment healthcare benefits | Medical inflation
Disclosure of defined benefit plans [line items]
Sensitivity level	(1.00%)
Effect on current service cost and on interest on actuarial obligations	R$ (6,925)
Effect on present value of obligations	R$ (72,369)
Post-employment healthcare benefits | Mortality table
Disclosure of defined benefit plans [line items]
Sensitivity level	(1.00%)
Effect on current service cost and on interest on actuarial obligations	R$ 2,148
Effect on present value of obligations	R$ 22,451

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- References

No definition available.

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

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 141
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_d&doctype=Standard
-URIDate 2018-03-16

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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plans assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Interest expense (income), net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 141
-Subparagraph c
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_c_i&doctype=Standard
-URIDate 2018-03-16

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