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Goodwill and other intangible assets - Amortization of Softwares Recognized in Income Statement (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]      
Cost of sales € 13,695 € 12,255 € 12,159 [1]
Research and development expenses 6,706 5,692 5,530 [1]
Selling and general expenses 10,492 9,555 9,391 [1]
Other operating expenses 2,531 1,805 1,415 [1]
Amortization expense 2,053 1,580 1,681 [1]
Amortization of computer software and other rights of an industrial or operational nature      
Disclosure of detailed information about intangible assets [line items]      
Cost of sales 10 18 19
Research and development expenses 1 3 2
Selling and general expenses 82 98 87
Other operating expenses 4 0 4
Amortization expense € 97 € 119 € 112
[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.