Other Financial Information - Revenue (Details) $ in Millions	Sep. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 759.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01 | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 114.5
Revenue recognition expected by period, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01 | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 645.0
Revenue recognition expected by period, satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 318.4
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	$ 21.1
Revenue recognition expected by period, satisfaction period	2 years
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	$ 297.3
Revenue recognition expected by period, satisfaction period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 58.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 2.8
Revenue recognition expected by period, satisfaction period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 55.9
Revenue recognition expected by period, satisfaction period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 1,136.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	138.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 998.2