Other Financial Information - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 199.6	$ 160.9
Accrued payroll and other employee compensation	138.5	145.4
Litigation reserve	96.6	92.9
Restructuring	69.3	22.2	$ 25.8	$ 28.3
Operating lease liabilities	42.3	35.0
Contract liabilities	36.1	39.8
Product warranty	36.5	43.3
Other	282.9	328.2
Total	$ 901.8	$ 867.7