XML 200 R103.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Gross Carrying Amount and Fair Value of Financial Assets Through Other Comprehensive Income-Securities by Maturity (Detail) - BRL (R$)
R$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Gross carrying amount R$ 10,258 R$ 10,666
Current Fair value 10,272 10,684
Non-current gross carrying amount 64,442 37,997
Non-current fair value 66,388 38,639
Gross carrying amount 74,700 48,663
Fair value 76,660 49,323
Non-stated maturity [Member]    
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Gross carrying amount 83 77
Current Fair value 149 161
Up to one year [member]    
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Gross carrying amount 10,175 10,589
Current Fair value 10,123 10,523
From one to five years [member]    
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Non-current gross carrying amount 45,704 21,417
Non-current fair value 46,456 21,650
From five to ten years [Member]    
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Non-current gross carrying amount 11,101 11,906
Non-current fair value 11,649 12,029
After ten years [Member]    
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]    
Non-current gross carrying amount 7,637 4,674
Non-current fair value R$ 8,283 R$ 4,960