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Operating Segments - Schedule of Operating Revenues, Costs and Expenses (Parenthetical) (Detail) R$ in Millions	12 Months Ended
	Dec. 31, 2015 BRL (R$)
Disclosure of operating segments [abstract]
Operating provision expense	R$ 1,084

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- References

No definition available.

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- Definition

Operating provision expense.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration