Shareholders’ equity - Schedule of Share Activity (Details) - shares	3 Months Ended			6 Months Ended
	Jan. 31, 2025	Oct. 31, 2024	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Jul. 31, 2024	Oct. 31, 2023	Jul. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)		0		0
Treasury shares, beginning balance (in shares)	(2,312,552)			(2,312,552)		(30,827,929)
Treasury shares, ending balance (in shares)	(2,312,552)			(2,312,552)
Balance at end of period (in shares)	201,343,253			201,343,253
Total shares outstanding at end of period (in shares)	199,030,701		203,002,762	199,030,701	203,002,762
Ordinary shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	0	232,171,182	232,171,182	232,171,182	232,171,182
Treasury shares canceled (in shares)	0		0	(30,827,929)	0
Ordinary shares canceled (in shares)	0		0	(201,343,253)	0
Balance at end of period (in shares)	0	0	232,171,182	0	232,171,182
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	201,343,253	0	0	0	0
Change in shares issued (in shares)	0	201,343,253	0	201,343,253	0
Balance at end of period (in shares)	201,343,253	201,343,253	0	201,343,253	0
Treasury shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares, beginning balance (in shares)	(2,312,552)	(1,061,473)	(29,168,420)	(2,312,552)	(29,168,420)	(30,827,929)	(28,382,963)	(27,893,680)
Treasury shares canceled (in shares)	0		0	30,827,929	0
Repurchases of ordinary shares (in shares)	(1,257,228)		(794,755)	(2,567,391)	(1,492,153)
Treasury shares used to settle share-based compensation awards (in shares)	6,149		9,298	254,839	217,413
Treasury shares, ending balance (in shares)	(2,312,552)	(1,061,473)	(29,168,420)	(2,312,552)	(29,168,420)
Employee Benefit Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	0	0	20,819	0	274,031
Employee Benefit Trust shares used to settle share-based compensation awards (in shares)	0		0	0	253,212
Shares sold upon termination of Employee Benefit Trust (in shares)	0		20,819	0	20,819
Balance at end of period (in shares)	0	0	0	0	0