EARNINGS PER SHARE (Details) - EUR (€) € / shares in Units, € in Thousands, shares in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic earnings per share [abstract]
Profit attributable to owners of the Company	€ 695,818	€ 784,678	€ 535,393
Weighted average number of common shares for basic earnings per common share (shares)	186,767	188,606	188,951
Basic earnings per common share (in Euros per share)	€ 3.73	€ 4.16	€ 2.83
Diluted earnings per share [abstract]
Owners of the parent	€ 695,818	€ 784,678	€ 535,393
Weighted average number of common shares for diluted earnings per common share (shares)	187,535	189,394	189,759
Diluted earnings per common share (in Euros per share)	€ 3.71	€ 4.14	€ 2.82

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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