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Statements of Comprehensive Income - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Profit or loss [abstract]
Profit for the year	R$ 2,519,310	R$ 2,947,098	R$ 536,279
Other comprehensive income (loss)	287,547	(472,266)	36,366
Items which will not be subsequently reclassified to the income statement:
Actuarial gains and (losses) on defined benefit plans	287,547	(472,266)	36,366
Total comprehensive income for the year	R$ 2,806,857	R$ 2,474,832	R$ 572,645

X

- Definition

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)]

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