XML 183 R97.htm IDEA: XBRL DOCUMENT
v3.20.1

Segment Reporting - Main Customer (Details) - Bioscience - Customer - customer | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of major customers |  |
Number of customers | 1 | 1
Percentage of entity's revenue | 10.06% | 11.00%

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- Definition The number of customers. + References No definition available. + Details
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Namespace Prefix: | grfs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of the entity's revenue. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_34&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_PercentageOfEntitysRevenue
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_SegmentsAxis=grfs_BioscienceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MajorCustomersAxis=grfs_CustomerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |