v3.26.1
Leases (Details 3) - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Finance lease receivables R$ 2,061,792 R$ 2,055,247
Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 22,574,256  
Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 3,303,623  
Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 3,134,099  
Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,993,484  
Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,600,616  
Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,020,721  
Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 8,521,713  
Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 13,764,868  
L T Amazonas [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 510,090  
L T Amazonas [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 80,402  
L T Amazonas [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 64,641  
L T Amazonas [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 64,641  
L T Amazonas [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 64,641  
L T Amazonas [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 64,641  
L T Amazonas [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 171,124  
L T Amazonas [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 322,409  
Sale And Leaseback Of Towers [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,962,680  
Sale And Leaseback Of Towers [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 316,388  
Sale And Leaseback Of Towers [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 307,188  
Sale And Leaseback Of Towers [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 307,188  
Sale And Leaseback Of Towers [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 307,188  
Sale And Leaseback Of Towers [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 307,188  
Sale And Leaseback Of Towers [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,417,540  
Sale And Leaseback Of Towers [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,630,795  
Other Finance Lease Liabilities [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 127,782  
Other Finance Lease Liabilities [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 47,043  
Other Finance Lease Liabilities [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 31,919  
Other Finance Lease Liabilities [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 24,203  
Other Finance Lease Liabilities [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 14,350  
Other Finance Lease Liabilities [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 5,615  
Other Finance Lease Liabilities [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 4,652  
Other Finance Lease Liabilities [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 108,588  
Lease Network Infrastructure [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 10,177,315  
Lease Network Infrastructure [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,386,393  
Lease Network Infrastructure [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,353,724  
Lease Network Infrastructure [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,305,258  
Lease Network Infrastructure [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,198,114  
Lease Network Infrastructure [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 987,892  
Lease Network Infrastructure [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 3,945,934  
Lease Network Infrastructure [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 6,086,081  
Leases Shops Kiosks And Real Estate [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,727,107  
Leases Shops Kiosks And Real Estate [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 336,472  
Leases Shops Kiosks And Real Estate [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 317,652  
Leases Shops Kiosks And Real Estate [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 286,969  
Leases Shops Kiosks And Real Estate [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 252,704  
Leases Shops Kiosks And Real Estate [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 214,759  
Leases Shops Kiosks And Real Estate [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,318,551  
Leases Shops Kiosks And Real Estate [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,533,853  
Lease Land Network [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 4,051,655  
Lease Land Network [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 553,926  
Lease Land Network [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 510,368  
Lease Land Network [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 491,641  
Lease Land Network [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 449,504  
Lease Land Network [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 382,304  
Lease Land Network [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 1,663,912  
Lease Land Network [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,470,403  
Lease Fiber [Member] | Nominal Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 2,017,627  
Lease Fiber [Member] | Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 582,999  
Lease Fiber [Member] | Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 548,607  
Lease Fiber [Member] | Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 513,584  
Lease Fiber [Member] | Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 314,115  
Lease Fiber [Member] | Later Than Five Years And Not Later Than Six Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables 58,322  
Lease Fiber [Member] | Later Than Six Years And Not Later Than Seven Years [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables  
Lease Fiber [Member] | Present Value [Member]    
IfrsStatementLineItems [Line Items]    
Finance lease receivables R$ 1,612,739