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Debt, cash and cash equivalents and lease liabilities - Summary of Interest Rate of Net Debt at Value on Redemption (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items]        
Total debt € 19,218 € 20,250 € 22,631 € 24,568
Cash and cash equivalents (12,736) (10,098) (13,915) [1],[2] € (9,427) [1]
Net debt 6,437 9,983 8,790  
Value on redemption after derivative instruments        
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items]        
Total debt   20,314 22,703  
Cash and cash equivalents (12,781) (10,267) (13,841)  
Net debt € 6,492 € 10,047 € 8,862  
Debt, percent   100.00% 100.00%  
Value on redemption after derivative instruments | Fixed-rate debt        
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items]        
Total debt   € 17,612 € 20,713  
Debt, percent 85.00% 87.00% 91.00%  
Value on redemption after derivative instruments | Floating-rate debt        
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items]        
Total debt   € 2,702 € 1,990  
Debt, percent 15.00% 13.00% 9.00%  
[1] (j)    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.
[2] 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.