Earnings per share (Details) - EUR (€)	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerators:
Net income attributable to shareholders of FMC-AG & Co. KGaA	€ 993,981,000	€ 268,685,000		€ 1,272,536,000	€ 576,860,000
Denominators:
Weighted average number of shares outstanding	306,355,571	306,523,865	306,523,865	306,404,051	306,383,373
Potentially dilutive shares	927,226.447239065	712,296	712,296	946,366.236000954	589,057
Basic earnings per share (in dollars per share)	€ 3.24	€ 0.88		€ 4.15	€ 1.88
Fully diluted earnings per share (in dollars per share)	€ 3.23	€ 0.87		€ 4.14	€ 1.88

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- Definition

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 number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

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The profit (loss) 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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