Audited  
          2018 
Rm 		    2017 
Rm 		   
7. FINANCIAL INSTRUMENTS              
  Carrying value of financial instruments by class:            
  Financial assets:            
  Trade receivables            
  – Industry     6 124   5 429  
  – Government     902   438  
  – Consumers     543   403  
  Other loans and receivables and cash balances     9 120   5 732  
  Finance lease receivables     459   499  
  Derivatives (including items designated as effective hedging instruments)            
  – Forward exchange contracts     1   42  
  Other financial assets at fair value     278   49  
  Total carrying value of financial assets     17 427   12 592  
  Financial liabilities:            
  Trade payables            
  – Principals     2 925   3 336  
  – Other suppliers     3 734   5 234  
  Other non-interest-bearing payables     490   435  
  Derivatives (including items designated as effective hedging instruments)            
  – Forward exchange contracts     35      
  – Other derivatives     9   5  
  Interest-bearing debt measured at amortised cost     13 920   9 134  
  Total carrying value of financial liabilities     21 113   18 144  
 

Fair value measurements recognised in the statement of financial position

Level 1 measurements are derived from quoted prices in active markets. Level 2 fair value measurements are those derived from inputs other than quoted prices included within Level 1 that are observable either directly or indirectly. Level 3 fair value measurements are those derived from valuation techniques that include inputs that are not based on observable market data (unobservable inputs).

        2018  
          Level 1 Level 2 Level 3 Total  
  Financial assets at fair value through profit or loss              
  Financial assets designated at fair value through profit or loss         55 55  
  Available-for-sale financial assets              
  Shares         5 5  
  Derivative assets designated as effective hedging instruments       1   1  
  Total       1 60 61  
  Financial liabilities at fair value through profit or loss              
  Financial liabilities designated at fair value through profit or loss     9     9  
  Derivatives     35     35  
  Total     44     44  

        2017  
          Level 1 Level 2 Level 3 Total  
  Financial assets at fair value through profit or loss              
  Financial assets designated at fair value through profit or loss         49 49  
  Available-for-sale financial assets              
  Shares         5 5  
  Derivative assets designated as effective hedging instruments       42   42  
  Total       42 54 96  
  Financial liabilities at fair value through profit or loss              
  Financial liabilities designated at fair value through profit or loss     5     5  
  Total     5     5