Stock-based compensation - Summarized Activity Related to Restricted Stock Units (Detail) - Restricted Stock Unit shares in Thousands	3 Months Ended
	Jan. 31, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares) | shares	69
Granted (in shares) | shares	36
Forfeited (in shares) | shares	(2)
Vested (in shares) | shares	(28)
Ending balance (in shares) | shares	75
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance (in dollars per share) | $ / shares	$ 236,280
Granted (in dollars per share) | $ / shares	233.74
Forfeited (in dollars per share) | $ / shares	240.72
Vested (in dollars per share) | $ / shares	233.59
Ending balance (in dollars per share) | $ / shares	$ 235.89