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Goodwill and other intangible assets - Schedule of Movements in Other Intangible Assets (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | € 21,407 | € 18,341 |  |
Amortization expense | (2,053) | (1,580) | € (1,681) | [1]
Other intangible assets, ending balance | 21,640 | 21,407 | 18,341 |
Gross value |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 78,865 | 72,307 | 71,296 |
Changes in scope of consolidation | 464 | 3,626 | 4,083 |
Acquisitions and other increases | 571 | 616 | 818 |
Disposals and other decreases | (543) | (502) | (333) |
Currency translation differences | 2,533 | 2,818 | (3,557) |
Transfers | (174) | 0 | 0 |
Other intangible assets, ending balance | 81,716 | 78,865 | 72,307 |
Accumulated amortization & impairment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | (57,458) | (53,966) | (54,787) |
Changes in scope of consolidation | 11 |  |  |
Amortization expense | (2,196) | (1,740) | (1,819) |
Impairment losses, net of reversals | 454 | (192) | (330) |
Disposals and other decreases | 525 | 462 | 321 |
Currency translation differences | (1,591) | (2,022) | 2,649 |
Transfers | 179 |  | 0 |
Other intangible assets, ending balance | (60,076) | (57,458) | (53,966) |
Acquired R&D |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 7,730 | 6,092 |  |
Other intangible assets, ending balance | 6,226 | 7,730 | 6,092 |
Acquired R&D | Gross value |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 11,207 | 9,600 | 5,730 |
Changes in scope of consolidation | 0 | 1,805 | 3,951 |
Acquisitions and other increases | 277 | 339 | 654 |
Disposals and other decreases | (72) | (313) | (44) |
Currency translation differences | 518 | 560 | (593) |
Transfers | (1,576) | (784) | (98) |
Other intangible assets, ending balance | 10,354 | 11,207 | 9,600 |
Acquired R&D | Accumulated amortization & impairment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | (3,477) | (3,508) | (3,396) |
Changes in scope of consolidation | 0 |  |  |
Amortization expense | 0 | 0 | 0 |
Impairment losses, net of reversals | (1,107) | (150) | (328) |
Disposals and other decreases | 75 | 313 | 44 |
Currency translation differences | (7) | (132) | 158 |
Transfers | 388 |  | 14 |
Other intangible assets, ending balance | (4,128) | (3,477) | (3,508) |
Products, trademarks and other rights |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 13,162 | 11,729 |  |
Other intangible assets, ending balance | 14,927 | 13,162 | 11,729 |
Products, trademarks and other rights | Gross value |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 65,906 | 61,074 | 63,953 |
Changes in scope of consolidation | 499 | 1,821 | 132 |
Acquisitions and other increases | 195 | 159 | 58 |
Disposals and other decreases | (423) | (173) | (243) |
Currency translation differences | 1,994 | 2,234 | (2,926) |
Transfers | 1,408 | 791 | 100 |
Other intangible assets, ending balance | 69,579 | 65,906 | 61,074 |
Products, trademarks and other rights | Accumulated amortization & impairment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | (52,744) | (49,345) | (50,314) |
Changes in scope of consolidation | 0 |  |  |
Amortization expense | (2,099) | (1,621) | (1,707) |
Impairment losses, net of reversals | 1,561 | (42) | (2) |
Disposals and other decreases | 411 | 133 | 232 |
Currency translation differences | (1,567) | (1,869) | 2,460 |
Transfers | (214) |  | (14) |
Other intangible assets, ending balance | (54,652) | (52,744) | (49,345) |
Software |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 515 | 520 |  |
Other intangible assets, ending balance | 487 | 515 | 520 |
Software | Gross value |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | 1,752 | 1,633 | 1,613 |
Changes in scope of consolidation | (35) | 0 | 0 |
Acquisitions and other increases | 99 | 118 | 106 |
Disposals and other decreases | (48) | (16) | (46) |
Currency translation differences | 21 | 24 | (38) |
Transfers | (6) | (7) | (2) |
Other intangible assets, ending balance | 1,783 | 1,752 | 1,633 |
Software | Accumulated amortization & impairment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Other intangible assets, beginning balance | (1,237) | (1,113) | (1,077) |
Changes in scope of consolidation | 11 |  |  |
Amortization expense | (97) | (119) | (112) |
Impairment losses, net of reversals | 0 | 0 | 0 |
Disposals and other decreases | 39 | 16 | 45 |
Currency translation differences | (17) | (21) | 31 |
Transfers | 5 |  | 0 |
Other intangible assets, ending balance | (1,296) | € (1,237) | € (1,113) |
IO License And Collaboration Agreement | Accumulated amortization & impairment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Amortization expense | € (226) |  |  |
[1] | Includes the impacts of the IFRIC final agenda decisions of March 2021 on the costs of configuring or customising application software used in a Software as a Service (SaaS) arrangement and of April 2021 on the attribution of benefits to periods of service, as described in Note A.2.1. to the consolidated financial statements for the year ended December 31, 2021.

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