Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

No definition available.

Name:	ifrs-full_DisclosureOfCreditRiskExposureLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Risk and Capital Management - Credit Risk Exposure (Parenthetical) (Detail) - BRL (R$) R$ in Millions	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017
Disclosure of credit risk exposure [line items]
Loan operations and lease operations	R$ 536,091	R$ 497,719	R$ 494,851
Financial assets designated at fair value through profit or loss [member]
Disclosure of credit risk exposure [line items]
Loan operations and lease operations		R$ 102