Other Financial Information - Revenue (Details) $ in Millions	Sep. 30, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 1,158.8
Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	109.8
Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	1,049.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	767.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01 | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 90.4
Revenue recognition expected by period, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01 | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 677.5
Revenue recognition expected by period, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 325.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 17.3
Revenue recognition expected by period, satisfaction period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 308.2
Revenue recognition expected by period, satisfaction period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 65.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 2.1
Revenue recognition expected by period, satisfaction period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 63.3
Revenue recognition expected by period, satisfaction period