Share repurchase program (Details) - USD ($)				1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 22, 2024	Nov. 13, 2023	Nov. 09, 2023	Dec. 31, 2023	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
325 Million Second Accelerated Share Repurchase
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares approved to be repurchased under share repurchase program, amount (up to)			$ 325,000,000
Shares repurchased under share repurchase program (in shares)	4,000,000	17,300,000	17,300,000
Shares repurchased value under share repurchase program		$ 260,000,000
Treasury stock, value, acquired, cost method		$ 260,000,000
Stock repurchase program, percent repurchased		80.00%
Number of shares repurchased (in shares)	4,000,000	17,300,000	17,300,000
December2023 Share Repurchase Program
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares approved to be repurchased under share repurchase program, amount (up to)				$ 650,000,000
Shares repurchased under share repurchase program (in shares)					5,100,000	0	10,900,000
Shares repurchased value under share repurchase program					$ 71,300,000		$ 155,800,000
Treasury stock value acquired not yet have been paid					$ 1,100,000
Average price paid per share (in dollar per share)					$ 14.05		$ 14.29
Treasury stock, value, acquired, cost method					$ 71,300,000		$ 155,800,000
Share repurchase program expiration date				Dec. 31, 2025
Number of shares repurchased (in shares)					5,100,000	0	10,900,000