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Subsequent events (Additional Information) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
May 09, 2023
Apr. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Subsequent Event [Line Items]        
Date Paid or To Be Paid     Jun. 08, 2023 Apr. 27, 2023
Common Class B Member        
Subsequent Event [Line Items]        
Dividends Payable, Amount Per Share     $ 0.025  
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Dividends Payable, Date Declared May 09, 2023      
Date Paid or To Be Paid Jun. 08, 2023      
Dividends Payable, Date of Record May 24, 2023      
Purchase of business   $ 265    
Term loan   $ 250    
Subsequent Event [Member] | Common Class B Member        
Subsequent Event [Line Items]        
Dividends Payable, Amount Per Share $ 0.025      
Subsequent Event [Member] | Common Class A Member        
Subsequent Event [Line Items]        
Dividends Payable, Amount Per Share $ 0.025