| Property, plant and equipment | 
        | 
      10,725 | 
        | 
      10,529 | 
        | 
      196 | 
    
    
      | Intangible assets | 
        | 
      1,745 | 
        | 
      1,842 | 
        | 
      (97) | 
    
    
      | Goodwill | 
        | 
      5,162 | 
        | 
      5,163 | 
        | 
      (1) | 
    
    
      | Right-of-use assets | 
        | 
      2,138 | 
        | 
      2,177 | 
        | 
      (39) | 
    
    
      | Trade receivables | 
        | 
      2,132 | 
        | 
      2,183 | 
        | 
      (51) | 
    
    
      | Trade payables | 
        | 
      (1,525) | 
        | 
      (1,614) | 
        | 
      89 | 
    
    
      | Provisions | 
        | 
      (1,216) | 
        | 
      (1,134) | 
        | 
      (82) | 
    
    
      | Deferred gain on sale and leaseback of real estate | 
        | 
      (106) | 
        | 
      (122) | 
        | 
      16 | 
    
    
      | Other operating assets and liabilities, net | 
        | 
      (240) | 
        | 
      (38) | 
        | 
      (202) | 
    
    
      | Net operating assets | 
        | 
      18,815 | 
        | 
      18,986 | 
        | 
      (171) | 
    
    
      | Net debt | 
        | 
      (6,218) | 
        | 
      (6,758) | 
        | 
      540 | 
    
    
      | Lease liabilities | 
        | 
      (1,988) | 
        | 
      (2,027) | 
        | 
      39 | 
    
    
      | Defined benefit obligations | 
        | 
      (795) | 
        | 
      (1,058) | 
        | 
      263 | 
    
    
      | Income tax assets and liabilities, net | 
        | 
      (643) | 
        | 
      (607) | 
        | 
      (36) | 
    
    
      | Equity-accounted investees and other non-current financial assets | 
        | 
      320 | 
        | 
      339 | 
        | 
      (19) | 
    
    
      | Equity | 
        | 
      9,491 | 
        | 
      8,875 | 
        | 
      616 | 
    
    
      |   | 
        | 
        | 
        | 
        | 
        | 
        | 
    
    
      | Equity ratio | 
        | 
      39.1 | 
        | 
      36.6 | 
        | 
        |