Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-01-01 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||||
| Property, plant and equipment [abstract] | ||||||||
| Property, plant and equipment |
710,000,000
EUR
|
— | — | — | — | — |
742,200,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | ||||||||
| Intangible assets other than goodwill [abstract] | ||||||||
| Intangible assets other than goodwill |
223,200,000
EUR
|
— | — | — | — | — |
248,200,000
EUR
|
— |
| Goodwill |
1,327,000,000
EUR
|
— | — | — | — | — |
1,366,500,000
EUR
|
— |
| Trade and other current receivables [abstract] | ||||||||
| Current trade receivables |
2,178,600,000
EUR
|
— | — | — | — | — |
2,232,300,000
EUR
|
— |
| Categories of non-current financial assets [abstract] | ||||||||
| Non-current loans and receivables |
1,000,000
EUR
|
— | — | — | — | — |
800,000
EUR
|
— |
| Categories of financial assets [abstract] | ||||||||
| Financial assets at fair value through other comprehensive income [abstract] | ||||||||
| Financial assets at fair value through other comprehensive income |
143,200,000
EUR
|
— | — | — | — | — |
139,200,000
EUR
|
— |
| Classes of current inventories [abstract] | ||||||||
| Current inventories |
597,000,000
EUR
|
— | — | — | — | — |
648,600,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | ||||||||
| Cash and cash equivalents [abstract] | ||||||||
| Cash and cash equivalents |
457,900,000
EUR
|
— | — |
662,400,000
EUR
|
— | — |
662,400,000
EUR
|
636,000,000
EUR
|
| Miscellaneous assets [abstract] | ||||||||
| Net defined benefit asset |
19,200,000
EUR
|
— | — | — | — | — |
21,700,000
EUR
|
— |
| Borrowings [abstract] | ||||||||
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||||
| Current borrowings |
5,600,000
EUR
|
— | — | — | — | — |
17,900,000
EUR
|
— |
| Current portion of non-current borrowings |
258,900,000
EUR
|
— | — | — | — | — |
103,700,000
EUR
|
— |
| Trade and other current payables [abstract] | ||||||||
| Current trade payables |
890,900,000
EUR
|
— | — | — | — | — |
809,800,000
EUR
|
— |
| Trade and other payables [abstract] | ||||||||
| Accruals and deferred income including contract liabilities [abstract] | ||||||||
| Accruals |
1,882,600,000
EUR
|
— | — | — | — | — |
1,725,000,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | ||||||||
| Non-current net defined benefit liability |
187,200,000
EUR
|
— | — | — | — | — |
172,900,000
EUR
|
— |
| Issued capital [abstract] | ||||||||
| Issued capital |
66,200,000
EUR
|
— | — | — | — | — |
66,200,000
EUR
|
— |
| Retained earnings [abstract] | ||||||||
| Retained earnings |
2,746,600,000
EUR
|
— | — | — | — | — |
2,687,900,000
EUR
|
— |
| Accumulated other comprehensive income [abstract] | ||||||||
| Reserve of exchange differences on translation |
173,200,000
EUR
|
173,200,000
EUR
|
— | — | — |
54,000,000
EUR
|
54,000,000
EUR
|
— |
| Reserve of remeasurements of defined benefit plans |
8,800,000
EUR
|
— |
8,800,000
EUR
|
— |
34,300,000
EUR
|
— |
34,300,000
EUR
|
— |
| Net assets (liabilities) [abstract] | ||||||||
| Assets |
8,792,000,000
EUR
|
— | — | — | — | — |
8,613,300,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | ||||||||
| Current assets |
6,125,900,000
EUR
|
— | — | — | — | — |
5,802,400,000
EUR
|
— |
| Current liabilities |
4,918,400,000
EUR
|
— | — | — | — | — |
4,533,200,000
EUR
|
— |
| Assets less current liabilities [abstract] |