XML 87 R70.htm IDEA: XBRL DOCUMENT v3.8.0.1
Employee benefits (Tables)
 12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Summary of Employee Benefits Provisions
     31 December
2017		      31 December
2016		  

Retirement pay liability provision

      149,449        120,755  

Unused vacation provision

      48,217        43,798  
  

 

 

     

 

 

  
     197,666        164,553  
  

 

 

     

 

 

  

 
Summary of Movement in Provision for Employee Termination Benefits

Movements in provision for employee termination benefits are as follows:

 

     2017      2016  

1 January

      120,755        74,435  

Service cost

      32,696        25,933  

Remeasurements

      3,738        34,532  

Interest expense

      13,877        8,361  

Benefit payments

      (21,617 )       (22,506 ) 
  

 

 

     

 

 

  

31 December

      149,449        120,755  
  

 

 

     

 

 

  

 
Summary of Sensitivity of Provision for Employee Termination Benefits to Changes in the Significant Actuarial Assumptions

The sensitivity of provision for employee termination benefits to changes in the significant actuarial assumptions is:

 

31 December 2017    Discount Rate     Inflation Rate  

Sensivity Level

    1% increase      1% decrease     1% increase     1% decrease  

Change in assumption

      (14.6% )       18.1 %      18.3 %      (14.3% ) 
  

 

 

     

 

 

    

 

 

    

 

 

  

Impact on provision for employee termination benefits

      (21,820 )       27,050       27,349       (21,371 ) 
  

 

 

     

 

 

    

 

 

    

 

 

  

 

31 December 2016    Discount Rate     Inflation Rate  

Sensivity Level

    1% increase      1% decrease     1% increase     1% decrease  

Change in assumption

      (14.7% )       18.1 %      18.6 %      (15.1% ) 
  

 

 

     

 

 

    

 

 

    

 

 

  

Impact on provision for employee termination benefits

      (17,751 )       21,857       22,460       (18,234 )