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Risk and Capital Management - Summary of Liquidity Indicators (Parenthetical) (Detail) - BRL (R$) R$ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of liquidity risk indicators [abstract]
Present value of financial assets	R$ 1,001,240	R$ 933,686

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- Definition

Disclosure of liquidity risk indicators [abstract]

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- Definition

Present value of liquid financial assets.

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