Employee Benefit Plans - Share Based Compensation by Cost and Expense Categories (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	$ 50.5	$ 44.0	$ 108.0	$ 86.0
Stock options
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	2.5	1.8	5.2	3.7
RSUs, RSAs, and PSAs
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	44.6	37.3	94.5	72.2
ESPP
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	3.4	4.9	8.3	10.1
Cost of revenues - Product
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	1.0	1.1	2.3	2.5
Cost of revenues - Service
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	3.9	3.4	8.4	7.6
Research and development
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	20.1	19.0	44.3	34.2
Sales and marketing
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	14.9	13.2	31.4	27.0
General and administrative
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	$ 10.6	$ 7.3	$ 21.6	$ 14.7