Equity Award Plans (Allocation of Share-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 294.3	$ 271.0
Cost of revenue \| Cost of product revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	1.3	2.4
Cost of revenue \| Cost of subscription and support revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	30.4	30.6
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	137.8	120.1
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	76.4	79.2
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 48.4	$ 38.7