Other Financial Information - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 234.4	$ 199.6
Accrued payroll and other employee compensation	129.1	138.5
Litigation reserve	0.0	96.6
Contract liabilities	61.8	36.1
Operating lease liabilities	45.9	42.3
Product warranty	29.9	36.5
Restructuring	43.7	69.3	$ 77.3	$ 22.2
Other	280.8	282.9
Accrued expenses and other liabilities	$ 825.6	$ 901.8