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Acquisitions and divestments - Other intangible assets (Detail)
€ in Millions
4 Months Ended
Dec. 31, 2020
EUR (€)
Acquisitions and divestments [Line Items]  
Identifiable intangible assets recognised as of acquisition date € 160
Intact Vascular [member]  
Acquisitions and divestments [Line Items]  
Identifiable intangible assets recognised as of acquisition date 169
Other intangible assets 169
Intact Vascular [member] | Other assets [member]  
Acquisitions and divestments [Line Items]  
Identifiable intangible assets recognised as of acquisition date € 9
Technology-based intangible assets [member] | Intact Vascular [member]  
Acquisitions and divestments [Line Items]  
Useful life measured as period of time, intangible assets other than goodwill 14 years
Other intangible assets [member] | Intact Vascular [member]  
Acquisitions and divestments [Line Items]  
Useful life measured as period of time, intangible assets other than goodwill 14 years