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Risk Management (Details 13) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	R$ 17,566,051	R$ 37,880,333
Assets | Fixed rate
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	11,614,849	33,026,609
Assets | IGP-M (General Index of market pricing) / IPCA (Consumer price index)
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	1,053,893	330,819
Assets | Exchange coupon
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	1,808,598	997,507
Assets | Foreign Currency
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	1,808,598	1,005,349
Assets | Equities
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	461,957	0
Assets | Sovereign/Eurobonds and Treasuries
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	560,619	2,301,628
Assets | Other
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	257,537	218,421
Liabilities
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	11,406,535	17,020,336
Liabilities | Fixed rate
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	6,184,099	13,806,553
Liabilities | IGP-M (General Index of market pricing) / IPCA (Consumer price index)
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	532,957	404,612
Liabilities | Exchange coupon
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	1,658,084	878,284
Liabilities | Foreign Currency
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	2,103,715	1,024,526
Liabilities | Equities
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	468,911	0
Liabilities | Sovereign/Eurobonds and Treasuries
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	360,252	906,361
Liabilities | Other
Financial Exposure - Trading Portfolio (Fair value)
Risk Factors	R$ 98,517	R$ 0

X

- Definition

Financial Exposure – Trading Portfolio (Fair value)

+ References

No definition available.

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- Definition

The measure of a potential loss exposure as a result of future market movements, based on a specified confidence interval and measurement horizon.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 41
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_41&doctype=Standard
-URIDate 2017-03-09

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