23. Financial instruments
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      Nominal amount  | 
      
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      Fair value  | 
      
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      Line item in the statement of financial position that includes the hedging instrument  | 
      
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      Change in the fair value used as the basis for recognizing hedge ineffectiveness  | 
      
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      Ineffectiveness  | 
      
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      Line item in the statement of comprehensive income that includes the ineffectiveness  | 
      
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      Maturity  | 
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      Assets  | 
      
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      Liabilities  | 
      
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      03/31/ 2018  | 
      
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      03/31/ 2019  | 
      
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      03/31/ 2018  | 
      
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      03/31/ 2019  | 
      
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      03/31/ 2018  | 
      
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      03/31/ 2019  | 
      
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      2018/19  | 
      
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      2017/18  | 
      
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      2018/19  | 
      
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      03/31/ 2018  | 
      
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      03/31/ 2019  | 
    
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Cash flow hedge  | 
      
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Foreign currency hedges  | 
      
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      436.2  | 
      
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      389.3  | 
      
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      15.6  | 
      
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      3.3  | 
      
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      2.6  | 
      
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      4.5  | 
      
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      Trade and other receivables (assets) Trade and other payables (liabilities)  | 
      
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      –1.2  | 
      
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      0.0  | 
      
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      0.0  | 
      
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      up to  | 
      
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      up to  | 
    
Interest rate hedges  | 
      
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      253.7  | 
      
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      0.0  | 
      
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      0.0  | 
      
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      0.0  | 
      
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      0.5  | 
      
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      0.0  | 
      
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      Trade and other payables (liabilities)  | 
      
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      0.0  | 
      
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      0.0  | 
      
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      0.0  | 
      
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      up to  | 
      
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Commodity hedges  | 
      
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      23.6  | 
      
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      88.5  | 
      
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      0.3  | 
      
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      9.2  | 
      
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      1.4  | 
      
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      0.4  | 
      
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      Trade and other receivables (assets) Trade and other payables (liabilities)  | 
      
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      8.8  | 
      
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      –0.1  | 
      
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      0.0  | 
      
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      Other operating expenses  | 
      
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      up to  | 
      
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      up to  | 
    
Total  | 
      
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      713.5  | 
      
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      477.8  | 
      
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      15.9  | 
      
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      12.5  | 
      
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      4.5  | 
      
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      4.9  | 
      
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      7.6  | 
      
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      –0.1  | 
      
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      0.0  | 
      
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      In millions of euros  | 
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