XML 73 R27.htm IDEA: XBRL DOCUMENT v3.8.0.1
Trade Accounts Payable
 12 Months Ended
Dec. 31, 2017
Trade Accounts Payable
21 TRADE ACCOUNTS PAYABLE

At December 31 this account comprises:

 

     2016      2017  

Unbilled services received

      924,025        132,513  

Invoices payable

      350,559        1,250,586  

Notes payable

      2,033        69,947  
  

 

 

     

 

 

  
     1,276,617        1,453,046  
  

 

 

     

 

 

  

Unbilled services received include the estimate made by Management of the valuation of the percentage of completion, amounting to S/132.5 million at December 31, 2017 (S/127.2 million at December 31, 2016).