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Other liabilities and provisions (Details)
$ / shares in Units, shares in Thousands, $ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Earnout Shares      
Other liabilities and provisions      
Period over which Earnout Shares are to be issued 5 years    
Earnout Shares | Maximum      
Other liabilities and provisions      
Shares issued under contingent earn out liability | shares 60,730    
Earnout Shares | Other liabilities      
Other liabilities and provisions      
Liabilities, fair value $ 27   $ 76
Earnout Shares | Option Pricing | Risk-free rate      
Other liabilities and provisions      
Valuation assumption 0.04    
Earnout Shares | Option Pricing | Volatility for shares, measurement input      
Other liabilities and provisions      
Valuation assumption 0.50   0.50
Change in valuation of the Public and Private Warrants $ 49 $ 130  
Percentage of reasonably possible increase in unobservable input 5.00%    
Percentage of reasonably possible decrease in unobservable input 5.00%    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input $ 10   $ 17
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input $ (10)   (17)
Earnout Shares | Year 1      
Other liabilities and provisions      
Value per share of Earnout Shares | $ / shares $ 13    
Earnout Shares | Year 2      
Other liabilities and provisions      
Value per share of Earnout Shares | $ / shares 15    
Earnout Shares | Year 3      
Other liabilities and provisions      
Value per share of Earnout Shares | $ / shares 16.50    
Earnout Shares | Year 4      
Other liabilities and provisions      
Value per share of Earnout Shares | $ / shares 18    
Earnout Shares | Year 5      
Other liabilities and provisions      
Value per share of Earnout Shares | $ / shares 19.50    
AMP Private Warrants      
Other liabilities and provisions      
Exercise price of warrants | $ / shares $ 11.50    
Warrant exercise period 5 years    
AMP Private Warrants | Other liabilities      
Other liabilities and provisions      
Warrant liability $ 2   $ 7
AMP Private Warrants | Option Pricing | Risk-free rate      
Other liabilities and provisions      
Valuation assumption 0.04    
AMP Private Warrants | Option Pricing | Volatility for shares, measurement input      
Other liabilities and provisions      
Valuation assumption 0.50   0.50
Change in valuation of the Public and Private Warrants $ 5 $ 16  
Percentage of reasonably possible increase in unobservable input 5.00%    
Percentage of reasonably possible decrease in unobservable input 5.00%    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input     $ 1
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input     $ (1)