XML 134 R109.htm IDEA: XBRL DOCUMENT v3.20.1

Financial Assets at Amortized Cost-Securities - Summary of Amortized Cost of Financial Assets at Amortized Cost (Detail) - BRL (R$) R$ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	R$ 1,010,644	R$ 994,759
Financial assets securities [Member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	133,119	110,395
Fair Value	130,466	106,749
Financial assets securities [Member] | Current [member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	30,113	14,661
Fair Value	29,766	14,119
Financial assets securities [Member] | Current [member] | Up to one year [member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	30,113	14,661
Fair Value	29,766	14,119
Financial assets securities [Member] | Non-current [member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	103,006	95,734
Fair Value	100,700	92,630
Financial assets securities [Member] | Non-current [member] | From one to five years [member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	57,120	51,820
Fair Value	56,178	50,970
Financial assets securities [Member] | Non-current [member] | From five to ten years [Member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	34,599	31,318
Fair Value	33,512	29,802
Financial assets securities [Member] | Non-current [member] | After ten years [Member]
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items]
Amortized cost	11,287	12,596
Fair Value	R$ 11,010	R$ 11,858

X

- Definition

The amount of financial assets at amortised cost. The amortised cost is the amount at which financial assets are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount, and adjusted for any impairment. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 8
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_f&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_FinancialAssetsAtAmortisedCost
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The fair value of financial assets. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_FinancialAssetsAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss.

+ References

No definition available.

+ Details

Name:	itub_DisclosureOfMaturityAnalysisForDerivativeFinancialAssetsDesignatedAtFairValueThroughProfitOrLossLineItems
Namespace Prefix:	itub_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=itub_FinancialAssetsSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_PastDueStatusAxis=ifrs-full_CurrentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_PastDueStatusAxis=itub_NonCurrentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsAndNotLaterThanTenYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTenYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: