Commitments and Contingencies - Schedule of Minimum Royalty Payments Associated With License Agreements (Details) - EUR (€) |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|
| Disclosure Of Minimum Royalty Payments Associated With License Agreements [Line Items] | |||
| Minimum royalty payments associated with license agreements | € 700,000,000 | € 1,695,000,000 | € 40,000,000 |
| Not Later Than One Year | |||
| Disclosure Of Minimum Royalty Payments Associated With License Agreements [Line Items] | |||
| Minimum royalty payments associated with license agreements | 548,000,000 | 1,060,000,000 | 26,000,000 |
| Later Than One Year But Not More Than 5 Years | |||
| Disclosure Of Minimum Royalty Payments Associated With License Agreements [Line Items] | |||
| Minimum royalty payments associated with license agreements | € 152,000,000 | € 635,000,000 | € 14,000,000 |