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INTANGIBLE ASSETS AND GOODWILL - Changes in Intangible Assets and Goodwill (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | € 70 | € 70
Intangible assets acquired through business combination |  | 0
Additions | 4 | 9
Amortization expense | (10) | (10)
Impairment | (1) |
Transfer | 0 | 0
Effect of changes in foreign exchange rates | (2) | 1
Intangible assets (excluding goodwill), ending balance | 61 | 70
Changes in goodwill [abstract] |  |
Goodwill, beginning balance | 455 | 422
Acquired through business combination |  | 24
Effect of changes in foreign exchange rates | (38) | 9
Goodwill, ending balance | 417 | 455
Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 217 |
Intangible assets (excluding goodwill), ending balance | 208 | 217
Changes in goodwill [abstract] |  |
Goodwill, beginning balance | 455 |
Goodwill, ending balance | 417 | 455
Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | (147) |
Intangible assets (excluding goodwill), ending balance | (147) | (147)
Technology |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 21 | 22
Intangible assets acquired through business combination |  | 0
Additions | 0 | 0
Amortization expense | (1) | (1)
Impairment | 0 |
Transfer | 0 | 0
Effect of changes in foreign exchange rates | (2) | 0
Intangible assets (excluding goodwill), ending balance | 18 | 21
Technology | Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 87 |
Intangible assets (excluding goodwill), ending balance | 79 | 87
Technology | Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | (66) |
Intangible assets (excluding goodwill), ending balance | (61) | (66)
Computer Software |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 19 | 18
Intangible assets acquired through business combination |  | 0
Additions | 0 | 1
Amortization expense | (8) | (8)
Impairment | (1) |
Transfer | 4 | 7
Effect of changes in foreign exchange rates | 1 | 1
Intangible assets (excluding goodwill), ending balance | 15 | 19
Computer Software | Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 73 |
Intangible assets (excluding goodwill), ending balance | 76 | 73
Computer Software | Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | (54) |
Intangible assets (excluding goodwill), ending balance | (61) | (54)
Customer relationships |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 14 | 15
Intangible assets acquired through business combination |  | 0
Additions | 0 | 0
Amortization expense | (1) | (1)
Impairment | 0 |
Transfer | 0 | 0
Effect of changes in foreign exchange rates | 0 | 0
Intangible assets (excluding goodwill), ending balance | 13 | 14
Customer relationships | Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 39 |
Intangible assets (excluding goodwill), ending balance | 37 | 39
Customer relationships | Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | (25) |
Intangible assets (excluding goodwill), ending balance | (24) | (25)
Work in Progress |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 14 | 13
Intangible assets acquired through business combination |  | 0
Additions | 4 | 8
Amortization expense | 0 | 0
Impairment | 0 |
Transfer | (4) | (7)
Effect of changes in foreign exchange rates | (1) | 0
Intangible assets (excluding goodwill), ending balance | 13 | 14
Work in Progress | Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 16 |
Intangible assets (excluding goodwill), ending balance | 14 | 16
Work in Progress | Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | (2) |
Intangible assets (excluding goodwill), ending balance | (1) | (2)
Other |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 2 | 2
Intangible assets acquired through business combination |  | 0
Additions | 0 | 0
Amortization expense | 0 | 0
Impairment | 0 |
Transfer | 0 | 0
Effect of changes in foreign exchange rates | 0 | 0
Intangible assets (excluding goodwill), ending balance | 2 | 2
Other | Cost |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 2 |
Intangible assets (excluding goodwill), ending balance | 2 | 2
Other | Less accumulated depreciation and impairment |  |
Changes in intangible assets other than goodwill [abstract] |  |
Intangible assets (excluding goodwill), beginning balance | 0 |
Intangible assets (excluding goodwill), ending balance | € 0 | € 0

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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_ii&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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