Revenues Revenues - Additional Information (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01 $ in Billions	Sep. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 years
Products and/or Services
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1.8
Consumables
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2.8