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Intangible assets - Schedule of changes in intangible assets (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | € 1,198 | € 1,102 |
Additions | 50 | 64 |
Capitalised expenses | 324 | 246 |
Amortisation | (216) | (213) | € (226)
Impairments | (12) | (5) |
Exchange rate differences | 9 | 7 |
Disposals | (9) | (10) |
Changes in the composition of the group and other changes | (10) | 8 |
Closing balance | 1,334 | 1,198 | 1,102
Gross carrying amount |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 3,123 |  |
Closing balance | 3,471 | 3,123 |
Accumulated amortisation |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (1,879) |  |
Closing balance | (2,084) | (1,879) |
Accumulated impairments |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (45) |  |
Closing balance | (53) | (45) |
Goodwill |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 469 | 464 |
Additions | 6 |  |
Impairments |  |  |
Exchange rate differences | 1 | 5 |
Closing balance | 476 | 469 | 464
Goodwill | Gross carrying amount |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 469 |  |
Closing balance | 476 | 469 |
Goodwill | Accumulated impairments |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January |  |  |
Closing balance |  |  |
Software |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 727 | 636 |
Additions | 43 | 64 |
Capitalised expenses | 324 | 246 |
Amortisation | (215) | (213) |
Impairments | (12) | (5) |
Exchange rate differences | 8 | 2 |
Disposals | (9) | (10) |
Changes in the composition of the group and other changes | (10) | 8 |
Closing balance | 855 | 727 | 636
Software | Gross carrying amount |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 2,646 |  |
Closing balance | 2,986 | 2,646 |
Software | Accumulated amortisation |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (1,876) |  |
Closing balance | (2,079) | (1,876) |
Software | Accumulated impairments |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (43) |  |
Closing balance | (52) | (43) |
Other |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 2 | 2 |
Additions | 1 |  |
Capitalised expenses |  |  |
Amortisation |  |  |
Impairments |  |  |
Exchange rate differences |  |  |
Disposals |  |  |
Changes in the composition of the group and other changes |  | 1 |
Closing balance | 3 | 2 | € 2
Other | Gross carrying amount |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | 8 |  |
Closing balance | 8 | 8 |
Other | Accumulated amortisation |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (4) |  |
Closing balance | (4) | (4) |
Other | Accumulated impairments |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Opening balance as at 1 January | (2) |  |
Closing balance | € (2) | € (2) |

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- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in intangible assets and goodwill resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in intangible assets and goodwill resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e&doctype=Standard -URIDate 2024-03-27 + Details
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