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29. Earnings per Share (Details) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share Details
Net income for the year of the Company	R$ 1,574,306	R$ 1,561,585	R$ 1,503,466
Weighted average shares outstanding - basic	541,813	541,391	543,775
Basic earnings per share	R$ 2.9056	R$ 2.8844	R$ 2.7649
Weighted average shares outstanding - diluted	545,740	545,509	548,054
Diluted earnings per share	R$ 2.8847	R$ 2.8626	R$ 2.7433

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The number of ordinary shares shall be the weighted average number of ordinary shares outstanding during the period.

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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