Segments - Revenue by Product (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Total	$ 5,564.5	$ 5,301.2	$ 4,735.4
Automated WAN Solutions
Segment Reporting Information [Line Items]
Total	1,839.3	1,865.3	1,665.0
Cloud-Ready Data Center
Segment Reporting Information [Line Items]
Total	744.7	878.9	727.1
AI-Driven Enterprise
Segment Reporting Information [Line Items]
Total	1,391.8	1,026.2	830.4
Hardware Maintenance and Professional Services
Segment Reporting Information [Line Items]
Total	$ 1,588.7	$ 1,530.8	$ 1,512.9