XML 114 R103.htm IDEA: XBRL DOCUMENT v3.19.1
15. Intangible assets (Details Narrative) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Intangible Assets Details Narrative Abstract      
Number of municipalities 369 368  
Program Contracts Commitments, Current R$ 230,695 R$ 128,802  
Program Contracts Commitments, Noncurrent 142,314 110,698  
Capitalized interest and inflation adjustment 488,502 649,048 R$ 700,743
Construction margin 63,013 70,335 81,513
Expropriations 106,429 19,576 R$ 40,452
Intangible assets - PPP R$ 3,208,464 2,818,805  
Intangible assets, physical evolution of contruction - PPP 96.80%    
Intangible assets, discount rate for adjustment - PPP 7.80%    
Intangible assets work in progress   10,387,000  
Intangible assets work in progress - São Paulo   6,497,000  
Intangible assets work in progress - PPP SÃO LOURENÇO   2,819,000  
Intangible assets work in progress - Franca   253,000  
Intangible assets work in progress, Itanhaém   R$ 208,000  
Amortization average rate 4.20% 3.90% 3.90%
Intangible assets related to PPP ALTO TIETÊ R$ 359,759 R$ 371,862  
Estimated monetary restatement 7,920,000    
Monthly assigned funds from tariffs R$ 10,361    
Adjustment to present value of agreement 8.20%    
Agreement percentage of revenue - São Paulo 51.52%    
Construction margin 2.30% 2.30%  
Funds from tariffs arising from services provided - PPP São Lourenço R$ 32,000