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Earnings per Share - Basic and Diluted Earnings per Share (Detail) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per share [abstract]
Net income for the year of the Company	R$ 1,150,421	R$ 1,526,505	R$ 1,537,837
Weighted average shares outstanding (in thousands)	1,084,128,000	1,083,825,000	1,082,782,000
Basic earnings per share -R$	R$ 1.0611	R$ 1.4084	R$ 1.4203
Net income for the year of the Company	R$ 1,150,421	R$ 1,526,505	R$ 1,537,837
Weighted average shares outstanding (in thousands), including dilution effects	1,091,335,000	1,091,605,000	1,091,019,000
Diluted earnings per share -R$	R$ 1.0541	R$ 1.3984	R$ 1.4095

X

- Definition

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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- Definition

The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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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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