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

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

X

- Definition

The number of customers.

+ References

No definition available.

+ Details

Name:	grfs_NumberOfCustomers
Namespace Prefix:	grfs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	ifrs-full_DisclosureOfMajorCustomersLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Details

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

X

- Details

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