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Share repurchase programs (Details) - USD ($)
$ / shares in Units, shares in Millions
1 Months Ended 3 Months Ended
Jun. 02, 2023
Dec. 31, 2020
Sep. 30, 2023
Accelerated Share Repurchase Program (ASR)      
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share repurchase program, authorized amount $ 300,000,000    
Number of shares repurchased (in shares) 15.2   3.1
Shares repurchased, value $ 240,000,000    
Percent repurchased 80.00%    
December 2020 Share Repurchase Program      
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share repurchase program, authorized amount   $ 300,000,000  
Stock repurchase program, period in force   3 years  
Number of shares repurchased (in shares)     1.7
Average price paid per share (in dollar per share)     $ 15.96
Shares repurchased, value     $ 27,900,000