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Share-based compensation - Narrative (Details)
€ / shares in Units, $ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2024
EUR (€)
€ / shares
shares
Dec. 31, 2024
GBP (£)
shares
Dec. 31, 2023
€ / shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
€ / shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Percentage of shares reserved for sale 10.00% 10.00% 10.00%   10.00%   10.00%
Performance shares              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Vesting period 3 years 3 years 3 years        
Weighted average grant date fair value (in usd per share) | (per share) $ 79.52 € 73.85   € 45.57 $ 48.55 € 34.50 $ 36.29
Awards vested (in shares) | shares 3,080,029 3,080,029 3,080,029   2,985,299   3,084,926
Fair value of awards vested $ 256       $ 147   $ 123
Unrecognized compensation expense $ 183            
Unrecognized compensation expense, remaining weighted average vesting period 1 year 2 months 19 days 1 year 2 months 19 days 1 year 2 months 19 days        
Performance shares | Total shareholder return metric              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Performance conditions, percentage 20.00% 20.00% 20.00%   20.00%    
Performance shares | Return on net assets metric              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Performance conditions, percentage 20.00% 20.00% 20.00%   20.00%    
Performance shares | Sustainability and diversity metric              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Performance conditions, percentage 15.00% 15.00% 15.00%   15.00%    
Performance shares | Cumulative cash flow metric              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Performance conditions, percentage 45.00% 45.00% 45.00%   45.00%    
Share option              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Unrecognized compensation expense $ 1            
Unrecognized compensation expense, remaining weighted average vesting period 1 year 1 month 17 days 1 year 1 month 17 days 1 year 1 month 17 days        
Amount participants may save per month   € 500 £ 500        
Participant purchase period 6 months 6 months 6 months        
Discount percentage 15.00% 15.00% 15.00%        
Stock purchased (in shares) | shares 236,581 236,581 236,581   86,520   402,645
Purchase price (in usd per share) | $ / shares $ 28.68       $ 26.82   $ 25.24
Share option | Minimum              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Participant saving period 3 years 3 years 3 years        
Share option | Maximum              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Participant saving period 5 years 5 years 5 years        
Share options, 3-year              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Volatility assumption, months in historical sample 37 months 37 months 37 months        
Share options, 5-year              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Volatility assumption, months in historical sample 61 months 61 months 61 months