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Shareholders' Equity - Additional Information (Details)
€ / shares in Units, € in Millions, $ in Millions
12 Months Ended
Dec. 31, 2020
EUR (€)
vote
€ / shares
shares
Dec. 31, 2019
shares
Dec. 31, 2018
shares
Mar. 03, 2021
EUR (€)
€ / shares
Mar. 03, 2021
USD ($)
Dec. 31, 2020
USD ($)
shares
Mar. 03, 2020
EUR (€)
€ / shares
Mar. 03, 2020
USD ($)
Dec. 31, 2017
shares
Class of Stock [Line Items]                  
Authorized share capital amount | € € 40                
Common stock, shares authorized (in shares) 2,000,000,000         2,000,000,000      
Special voting shares, shares authorized (in shares) 2,000,000,000         2,000,000,000      
Special voting shares (in eur per share) | € / shares € 0.01                
Common and special voting shares € 18         $ 25      
Common shares, shares issued (in shares) 1,364,400,196         1,364,400,196      
Common shares outstanding (in shares) 1,353,910,471 1,350,132,117       1,353,910,471      
Treasury stock (in shares) 10,489,725         10,489,725      
Special voting shares issued (in shares) 396,474,276         396,474,276      
Special voting shares outstanding (in shares) 371,328,154 387,951,166       371,328,154      
Retirement of special voting shares (in shares) 16,623,012 774,458 181,066            
Capital increase (in shares) 3,778,354 2,568,751 2,741,322            
Number of votes eligible for each common share (in votes) | vote 2                
Common shares, registered three years                
Period in force 18 months                
Stock repurchase program percentage of shares authorized to be repurchased 10.00%         10.00%      
Treasury stock, value | $           $ 106      
Dividend declared (in eur per share) | € / shares             € 0.18    
Dividend declared amount             € 243 $ 267  
Special Voting Shares                  
Class of Stock [Line Items]                  
Treasury stock (in shares) 25,146,122         25,146,122      
Special voting shares outstanding (in shares) 371,328,154 387,951,166 388,725,624     371,328,154     388,906,690
Retirement of special voting shares (in shares) 16,623,012 774,458 181,066            
Subsequent Event                  
Class of Stock [Line Items]                  
Dividend declared (in eur per share) | € / shares       € 0.11          
Dividend declared amount       € 150 $ 180