XML 161 R125.htm IDEA: XBRL DOCUMENT v3.22.1
Schedule of composition of intangible assets (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
IfrsStatementLineItems [Line Items]        
Intangible assets R$ 12,953 R$ 11,810 R$ 11,624 R$ 10,777
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (9,822)      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 12,953 11,810    
Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]   (9,194)    
Onerous Concession [Member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 13 19    
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (8) (13)    
Temporary Easement Intangible Assets [Member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 15 13    
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (5)      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 10 9    
Temporary Easement Intangible Assets [Member] | Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]   (4)    
Onerous Concession [Member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 5 6    
Service concession rights [member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 21,476 20,781    
Assets Of Concession [Member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (9,669)      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 11,807 11,674    
Assets Of Concession [Member] | Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]   (9,107)    
Assets Of Concession G S F [Member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 1,032 0    
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (66)      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 966 0    
Assets Of Concession G S F [Member] | Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]   0    
Other intangible assets [member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 78 78    
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0] (74)      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 4 8    
Other intangible assets [member] | Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]   (70)    
Intangible assets under development [member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 161 113 82 63
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]      
[custom:IntangibleAssetsOtherThanGoodwillResidualValue-0] 161 113    
Intangible assets under development [member] | Gross carrying amount [member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 22,614 20,891    
Useful Life Defined Intangible Asset [Member]        
IfrsStatementLineItems [Line Items]        
Intangible assets 12,792 11,697 R$ 11,542 R$ 10,714
Useful Life Defined Intangible Asset [Member] | Accumulated depreciation and amortisation [member]        
IfrsStatementLineItems [Line Items]        
Intangible assets R$ (9,822) (9,194)    
Useful Life Defined Intangible Asset [Member] | Intangible assets under development [member]        
IfrsStatementLineItems [Line Items]        
[custom:IntangibleAssetsOtherThanGoodwillAccumulatedAmortization-0]