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Provisions, income tax liabilities and other liabilities - Total Expense for Pensions and Other Post-employment Benefits Allocated between Income Statement (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]      
Cost of sales € 14,236 € 13,695 € 12,255
Research and development expenses 6,728 6,706 5,692
Selling and general expenses 10,692 10,492 9,555
Other operating (income)/expenses, net 2,979 1,231 1,373
Financial expenses 1,313 440 368
Pensions and other post-employment benefits      
Disclosure of defined benefit plans [line items]      
Cost of sales 34 55 77
Research and development expenses 28 52 65
Selling and general expenses 61 81 87
Other operating (income)/expenses, net 5 (2) (1)
Restructuring costs (9) (61) 6
Financial expenses 71 43 42
Total € 190 € 168 € 276