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Goodwill and other intangible assets - Schedule of Movements in Other Intangible Assets (Details) - EUR (€) € in Millions | 6 Months Ended
--- | ---
Jun. 30, 2026 | Jun. 30, 2025
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | € 26,261 |
Amortization expense | (1,087) | € (777)
Intangible assets other than goodwill at end of period | 26,359 |
Gross value |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 83,585 |
Changes in scope of consolidation | 1,150 |
Acquisitions and other increases | 531 |
Disposals and other decreases | (579) |
Currency translation differences | 1,568 |
Transfers | (411) |
Intangible assets other than goodwill at end of period | 85,844 |
Accumulated amortization and impairment |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | (57,324) |
Amortization expense | 1,164 |
Impairment losses, net of reversals | 1,048 |
Disposals and other decreases | 577 |
Currency translation differences | (930) |
Transfers | 404 |
Intangible assets other than goodwill at end of period | (59,485) |
Acquired R&D |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 8,731 |
Intangible assets other than goodwill at end of period | 8,026 |
Acquired R&D | Gross value |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 14,951 |
Changes in scope of consolidation | 0 |
Acquisitions and other increases | 321 |
Disposals and other decreases | (534) |
Currency translation differences | 324 |
Transfers | (245) |
Intangible assets other than goodwill at end of period | 14,817 |
Acquired R&D | Accumulated amortization and impairment |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | (6,220) |
Amortization expense | 0 |
Impairment losses, net of reversals | 970 |
Disposals and other decreases | 534 |
Currency translation differences | (135) |
Transfers | 0 |
Intangible assets other than goodwill at end of period | (6,791) |
Products, trademarks and other rights |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 17,122 |
Intangible assets other than goodwill at end of period | 17,911 |
Products, trademarks and other rights | Gross value |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 66,746 |
Changes in scope of consolidation | 1,149 |
Acquisitions and other increases | 122 |
Disposals and other decreases | (17) |
Currency translation differences | 1,232 |
Transfers | (162) |
Intangible assets other than goodwill at end of period | 69,070 |
Products, trademarks and other rights | Accumulated amortization and impairment |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | (49,624) |
Amortization expense | 1,106 |
Impairment losses, net of reversals | 61 |
Disposals and other decreases | 17 |
Currency translation differences | (785) |
Transfers | 400 |
Intangible assets other than goodwill at end of period | (51,159) |
Software |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 408 |
Intangible assets other than goodwill at end of period | 422 |
Software | Gross value |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | 1,888 |
Changes in scope of consolidation | 1 |
Acquisitions and other increases | 88 |
Disposals and other decreases | (28) |
Currency translation differences | 12 |
Transfers | (4) |
Intangible assets other than goodwill at end of period | 1,957 |
Software | Accumulated amortization and impairment |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets other than goodwill at beginning of period | (1,480) |
Amortization expense | 58 |
Impairment losses, net of reversals | 17 |
Disposals and other decreases | 26 |
Currency translation differences | (10) |
Transfers | 4 |
Intangible assets other than goodwill at end of period | € (1,535) |

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- Definition The decrease in intangible assets other than goodwill resulting from disposals and retirements. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2025-01-01 -Paragraph 118 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2025-en-r&anchor=para_118_e&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of impairment loss recognised in other comprehensive income for intangible assets other than goodwill. [Refer: Impairment loss recognised in other comprehensive income; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2025-01-01 -Paragraph 118 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2025-en-r&anchor=para_118_e_iii&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 263 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_263_e_iii&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 263 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_263_e_iii&doctype=Standard -URIDate 2025-03-27 + Details
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