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Pensions and other post-employment benefits - Narrative (Details)
€ in Millions
12 Months Ended
Dec. 31, 2023
EUR (€)
plan
Dec. 31, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
Pensions and Other Post-Employment Benefits      
Net defined benefit liability (asset) | € € (3,959) € (4,295)  
Employer contributions expected to be paid next year | € 56    
Amount transferred in excess of pension assets | € 131 117  
Effect of asset ceiling      
Pensions and Other Post-Employment Benefits      
Net defined benefit liability (asset) | € € 87 € 84 € 92
Untied States, Germany and United Kingdom      
Pensions and Other Post-Employment Benefits      
Percentage of total defined benefit obligation (as a percent) 93.00% 91.00%  
Percentage of total plan assets (as a percent) 91.00% 90.00%  
United States foreign defined benefit plans and post retirement benefits plan      
Pensions and Other Post-Employment Benefits      
Number of defined benefit plans 2    
Number of unions with continuing coverage 2    
Number of separate trusts in addition to the Master Trust 2    
Total number of pension plans 2    
Estimated direct benefit payments | € € 111    
Germany foreign defined benefit plans and post retirement plans      
Pensions and Other Post-Employment Benefits      
Number of defined benefit plans 2    
Nokia Retirement Plan For Former NSN & ALU Employees      
Pensions and Other Post-Employment Benefits      
Number of defined benefit plans 1    
United States foreign defined benefit plans      
Pensions and Other Post-Employment Benefits      
Percentage of total healthcare obligations for capped employees 98.00%    
Securities, equity | United States foreign defined benefit plans and post retirement benefits plan      
Pensions and Other Post-Employment Benefits      
Investment allocation balance (as a percent) 20.00%    
Investments, fixed income | United States foreign defined benefit plans and post retirement benefits plan      
Pensions and Other Post-Employment Benefits      
Investment allocation balance (as a percent) 80.00%