Commitments and Contingencies - Additional Information (Details) € in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2018
EUR (€)
Lawsuit
|
Dec. 31, 2017
EUR (€)
|
Dec. 31, 2016
EUR (€)
|
|
| Commitments And Contingencies [Line Items] | |||
| Lease expenses | € 79 | € 52 | € 19 |
| Number of lawsuits on alleging unlawful practices | Lawsuit | 6 | ||
| Commitments And Contingencies [Line Items] | |||
| Minimum Spend Commitments Under Service Agreement | € 270 | ||
| Service Agreement Term | 2 years | ||