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Total Equity - Non-Controlling Interests (Details) - EUR (€)
€ in Millions
12 Months Ended
Nov. 11, 2021
Oct. 01, 2021
Jan. 28, 2021
Dec. 31, 2021
Dec. 31, 2020
Disclosure of reserves within equity [line items]          
Non-controlling interests       € 2,670 € 211
Qualtrics International          
Disclosure of reserves within equity [line items]          
Non-controlling interests     € 909    
Proportion of ownership interest in subsidiary 74.00% 78.00%   74.00%  
Additional value of non-controlling interests € 250 € 261      
Qualtrics International | Initial Public Offering (IPO)          
Disclosure of reserves within equity [line items]          
Percentage of shares issued 4.00%   12.00%    
Proceeds received from IPO € 981   € 1,847