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Income from operations - Depreciation and amortization (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income from operations [Line Items]      
Depreciation and amortisation expense € 1,261 [1] € 1,602 [2] € 1,323 [1]
Property, plant and equipment [member]      
Income from operations [Line Items]      
Depreciation expense [2] 689 711 630
Computer software [member]      
Income from operations [Line Items]      
Amortisation expense [2] 98 117 88
Other intangible assets [member]      
Income from operations [Line Items]      
Amortisation expense [2] 290 363 322
Capitalised development expenditure [member]      
Income from operations [Line Items]      
Amortisation expense [2] € 184 € 411 € 284
[1] Includes impairments; for impairment values please refer to Property, plant and equipment and Intangible assets excluding goodwill
[2] Includes impairments; for impairment values please refer to Property, plant and equipment and Intangible assets excluding goodwill