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Basis of Presentation - IFRS 15 (Details) € in Thousands | 12 Months Ended
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Dec. 31, 2018 EUR (€)
Basis of Presentation |
Costs of obtaining a contract | € 2,934

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- References No definition available. + Details
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Namespace Prefix: | grfs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of cost to obtain contract with customers. + References No definition available. + Details
Name: | grfs_CostToObtainContractWithCustomers
Namespace Prefix: | grfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration