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Subsequent Events - Acquisition of ownership interest in Shanghai RAAS (Details) € in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 30, 2020 EUR (€) person | Dec. 31, 2019 EUR (€) shares | Mar. 31, 2019 | Dec. 31, 2019 EUR (€) shares | Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€)
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Number of subsidiary's shares delivered in exchange for investment | shares |  |  |  | 90 |  |
Number of shares received in exchange for investment | shares |  | 1,766,000,000 |  | 1,766,000,000 |  |
Investments accounted for using equity method | € |  | € 114,473 |  | € 114,473 | € 226,905 | € 219,009
Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Economic rights (as a percent) |  |  | 55.00% |  |  |
Voting rights (as percent) |  |  | 60.00% |  |  |
Shanghai RAAS Blood Products, Co. Ltd. | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Minority shareholders interest |  |  |  | 45.00% |  |
Shanghai RAAS Blood Products, Co. Ltd. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Proportion of ownership interest in associate |  |  | 26.20% |  |  |
Number of shares received in exchange for investment | shares |  | 1,766,000,000 |  | 1,766,000,000 |  |
Gain recognized, fair value adjustment | € |  | € 57,000 |  |  |  |
Shanghai RAAS Blood Products, Co. Ltd. | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Number of subsidiary's shares delivered in exchange for investment | shares |  |  |  | 90 |  |
Shanghai RAAS Blood Products, Co. Ltd. | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Economic rights (as a percent) |  |  | 45.00% |  |  |
Voting rights (in percent) |  |  | 40.00% |  |  |
Acquisition of ownership interest | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Economic rights (as a percent) | 55.00% |  |  |  |  |
Voting rights (as percent) | 60.00% |  |  |  |  |
Acquisition of ownership interest | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Total number of board members | person | 5 |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Total number of board members | person | 9 |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Number of members that serve of the board of an associate | person | 2 |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Proportion of ownership interest in associate | 26.20% |  |  |  |  |
Number of members that serve of the board of an associate | person | 3 |  |  |  |  |
Investments accounted for using equity method | € | € 1,773,000 |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. | Grifols Diagnostics Solutions, Inc. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Economic rights (as a percent) | 45.00% |  |  |  |  |
Voting rights contributed (as a percent) | 40.00% |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. | Creat Group Co. Ltd. |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Proportion of ownership interest in associate | 26.18% |  |  |  |  |
Acquisition of ownership interest | Shanghai RAAS Blood Products, Co. Ltd. | RAAS China Limited |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Proportion of ownership interest in associate | 22.78% |  |  |  |  |

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