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Loans payable and other financial liabilities - Narrative (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
$ / shares
$ / item
shares
Dec. 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
Jan. 14, 2021
USD ($)
Aug. 31, 2018
USD ($)
Aug. 24, 2018
Debt Instrument [Line Items]                
Gain in interest income and other financial gains   $ 8,000,000 $ 8,000,000          
Revolving Credit Facility                
Debt Instrument [Line Items]                
Borrowing under the facility   0 0          
Revolving Credit Facility | Subsidiaries                
Debt Instrument [Line Items]                
Maximum borrowing capacity         $ 400,000,000      
2.375% Sustainability Notes due 2026                
Debt Instrument [Line Items]                
Convertible senior notes, interest rate           2.375%    
Face amount           $ 400,000,000    
Total amount paid $ 38,000,000              
2026 Sustainability Notes                
Debt Instrument [Line Items]                
Repurchased principal amount 2,000,000              
Outstanding amount     398,000,000          
2031 Notes                
Debt Instrument [Line Items]                
Convertible senior notes, interest rate           3.125%    
Face amount           $ 700,000,000    
Repurchased principal amount $ 44,000,000              
Outstanding amount     656,000,000          
Initial Issuance - 2028 Convertible Senior Notes | Convertible Senior Notes                
Debt Instrument [Line Items]                
Convertible senior notes, interest rate               2.00%
2028 Notes | Convertible Senior Notes                
Debt Instrument [Line Items]                
Convertible senior notes, interest rate             2.00%  
Face amount             $ 880,000,000  
Debt instrument outstanding   439,000,000 439,000,000 $ 439,000,000        
Debt issuance costs   3,000,000 3,000,000 3,000,000        
Amortization of debt issuance costs   $ 2,000,000 $ 5,000,000          
Common stock, closing price per share (in dollars per share) | $ / shares   $ 1,184.6 $ 1,184.6          
Shares able to obtain (in shares) | shares   256,442 256,442          
Estimated fair value   $ 1,202,000,000 $ 1,202,000,000 $ 884,000,000        
Closing trading amount price per share (in dollars per item) | $ / item     100          
Debt instrument convertible, if-converted in excess of principal   $ 734,000,000 $ 734,000,000          
Seven Notes Converted                
Debt Instrument [Line Items]                
Total principal amount     $ 10,000